Document:

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                                                                     EXHIBIT 4.1

                          ORBITAL SCIENCES CORPORATION
                                  (as Issuer)

                           ORBITAL INTERNATIONAL, INC.

                                 (as Guarantor)

                                  $135,000,000
                   12% SECOND PRIORITY SECURED NOTES DUE 2006

                                    INDENTURE

                           DATED AS OF AUGUST 22, 2002

                                 U.S. BANK, N.A.

                                  (as Trustee)
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                                TABLE OF CONTENTS
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ARTICLE I
         DEFINITIONS AND INCORPORATION
         BY REFERENCE..............................................................................       1
         SECTION 1.1       DEFINITIONS.............................................................       1
         SECTION 1.2       OTHER DEFINITIONS.......................................................      25
         SECTION 1.3       INCORPORATION BY REFERENCE OF TRUST INDENTURE ACT.......................      26
         SECTION 1.4       RULES OF CONSTRUCTION...................................................      26

ARTICLE II
         THE NOTES.................................................................................      27
         SECTION 2.1       FORM AND DATING.........................................................      27
         SECTION 2.2       EXECUTION AND AUTHENTICATION............................................      28
         SECTION 2.3       REGISTRAR, PAYING AGENT AND DEPOSITARY..................................      29
         SECTION 2.4       PAYING AGENT TO HOLD MONEY IN TRUST.....................................      29
         SECTION 2.5       HOLDER LISTS............................................................      29
         SECTION 2.6       TRANSFER AND EXCHANGE...................................................      30
         SECTION 2.7       REPLACEMENT NOTES.......................................................      44
         SECTION 2.8       OUTSTANDING NOTES.......................................................      44
         SECTION 2.9       TREASURY NOTES..........................................................      45
         SECTION 2.10      TEMPORARY NOTES.........................................................      45
         SECTION 2.11      CANCELLATION............................................................      45
         SECTION 2.12      DEFAULTED INTEREST......................................................      45
         SECTION 2.13      CUSIP NUMBERS...........................................................      46

ARTICLE III
         REDEMPTION................................................................................      46
         SECTION 3.1       NOTICES TO TRUSTEE......................................................      46
         SECTION 3.2       SELECTION OF NOTES TO BE REDEEMED.......................................      47
         SECTION 3.3       NOTICE OF REDEMPTION....................................................      47
         SECTION 3.4       EFFECT OF NOTICE OF REDEMPTION..........................................      48
         SECTION 3.5       DEPOSIT OF REDEMPTION PRICE.............................................      48
         SECTION 3.6       NOTES REDEEMED IN PART..................................................      49
         SECTION 3.7       OPTIONAL REDEMPTION.....................................................      49
         SECTION 3.8       NO MANDATORY REDEMPTION.................................................      50

ARTICLE IV
         COVENANTS.................................................................................      50
         SECTION 4.1       PAYMENT OF NOTES........................................................      50
         SECTION 4.2       MAINTENANCE OF OFFICE OR AGENCY.........................................      50
         SECTION 4.3       SEC REPORTS AND REPORTS TO HOLDERS......................................      51
         SECTION 4.4       COMPLIANCE CERTIFICATE..................................................      51
         SECTION 4.5       TAXES...................................................................      52
         SECTION 4.6       STAY, EXTENSION AND USURY LAWS..........................................      52
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         SECTION 4.7       LIMITATION ON INCURRENCE OF ADDITIONAL INDEBTEDNESS
                           AND DISQUALIFIED CAPITAL STOCK..........................................      52
         SECTION 4.8       LIMITATION ON LIENS.....................................................      53
         SECTION 4.9       LIMITATION ON RESTRICTED PAYMENTS.......................................      53
         SECTION 4.10      LIMITATION ON DIVIDENDS AND OTHER PAYMENT
                           RESTRICTIONS AFFECTING SUBSIDIARIES.....................................      55
         SECTION 4.11      LIMITATION ON IMPAIRMENT OF SECURITY INTERESTS..........................      57
         SECTION 4.12      LIMITATION ON TRANSACTIONS WITH AFFILIATES..............................      57
         SECTION 4.13      LIMITATION ON SALE OF ASSETS AND SUBSIDIARY STOCK.......................      57
         SECTION 4.14      LIMITATION ON SALE-LEASEBACK TRANSACTIONS...............................      60
         SECTION 4.15      LIMITATION ON LAYERING INDEBTEDNESS.....................................      60
         SECTION 4.16      REPURCHASE OF NOTES AT THE OPTION OF THE HOLDER
                           UPON A CHANGE OF CONTROL................................................      61
         SECTION 4.17      SUBSIDIARY GUARANTORS...................................................      62
         SECTION 4.18      LIMITATION ON STATUS AS INVESTMENT COMPANY..............................      62
         SECTION 4.19      MAINTENANCE OF PROPERTIES AND INSURANCE.................................      63
         SECTION 4.20      CORPORATE EXISTENCE.....................................................      63

ARTICLE V
         SUCCESSORS................................................................................      63
         SECTION 5.1       MERGER, CONSOLIDATION OR SALE OF ASSETS.................................      63
         SECTION 5.2       SUCCESSOR CORPORATION SUBSTITUTED.......................................      64

ARTICLE VI
         DEFAULTS AND REMEDIES ....................................................................      65
         SECTION 6.1       EVENTS OF DEFAULT.......................................................      65
         SECTION 6.2       ACCELERATION............................................................      66
         SECTION 6.3       OTHER REMEDIES..........................................................      67
         SECTION 6.4       WAIVER OF PAST DEFAULTS.................................................      68
         SECTION 6.5       CONTROL BY MAJORITY.....................................................      68
         SECTION 6.6       LIMITATION ON SUITS ....................................................      68
         SECTION 6.7       RIGHTS OF HOLDERS OF NOTES TO RECEIVE PAYMENT...........................      69
         SECTION 6.8       COLLECTION SUIT BY TRUSTEE..............................................      69
         SECTION 6.9       TRUSTEE MAY FILE PROOFS OF CLAIM........................................      69
         SECTION 6.10      PRIORITIES..............................................................      70
         SECTION 6.11      UNDERTAKING FOR COSTS...................................................      70

ARTICLE VII
         TRUSTEE...................................................................................      71
         SECTION 7.1       DUTIES OF TRUSTEE ......................................................      71
         SECTION 7.2       RIGHTS OF TRUSTEE.......................................................      72
         SECTION 7.3       INDIVIDUAL RIGHTS OF TRUSTEE ...........................................      73
         SECTION 7.4       TRUSTEE'S DISCLAIMER ...................................................      73
         SECTION 7.5       NOTICE OF DEFAULTS......................................................      74

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         SECTION 7.6       REPORTS BY TRUSTEE TO HOLDERS OF THE NOTES..............................      74
         SECTION 7.7       COMPENSATION AND INDEMNITY..............................................      74
         SECTION 7.8       REPLACEMENT OF TRUSTEE..................................................      75
         SECTION 7.9       SUCCESSOR TRUSTEE BY MERGER, ETC........................................      76
         SECTION 7.10      ELIGIBILITY; DISQUALIFICATION...........................................      76
         SECTION 7.11      PREFERENTIAL COLLECTION OF CLAIMS AGAINST COMPANY.......................      76

 ARTICLE VIII
         LEGAL DEFEASANCE AND COVENANT DEFEASANCE..................................................      77
         SECTION 8.1       OPTION TO EFFECT LEGAL DEFEASANCE OR COVENANT
                           DEFEASANCE .............................................................      77
         SECTION 8.2       LEGAL DEFEASANCE AND DISCHARGE .........................................      77
         SECTION 8.3       COVENANT DEFEASANCE.....................................................      77
         SECTION 8.4       CONDITIONS TO LEGAL OR COVENANT DEFEASANCE..............................      78
         SECTION 8.5       DEPOSITED MONEY AND GOVERNMENT SECURITIES TO
                           BE HELD IN TRUST; OTHER MISCELLANEOUS PROVISIONS........................      79
         SECTION 8.6       REPAYMENT TO COMPANY....................................................      80
         SECTION 8.7       REINSTATEMENT...........................................................      80

ARTICLE IX
         AMENDMENT, SUPPLEMENT AND WAIVER..........................................................      81
         SECTION 9.1       WITHOUT CONSENT OF HOLDERS OF NOTES.....................................      81
         SECTION 9.2       WITH CONSENT OF HOLDERS OF NOTES........................................      82
         SECTION 9.3       COMPLIANCE WITH TRUST INDENTURE ACT.....................................      83
         SECTION 9.4       REVOCATION AND EFFECT OF CONSENTS.......................................      84
         SECTION 9.5       NOTATION ON OR EXCHANGE OF NOTES........................................      84
         SECTION 9.6       TRUSTEE TO SIGN AMENDMENTS, ETC.........................................      84

         ARTICLE X
         COLLATERAL AND SECURITY AND GUARANTY....  ................................................      85
         Section 10.1      Collateral Agreements; Security Interests...............................      85
         SECTION 10.2      FURTHER ASSURANCES AND SECURITY.........................................      86
         SECTION 10.3      OPINIONS................................................................      87
         SECTION 10.4      POSSESSION, USE AND RELEASE OF COLLATERAL...............................      87
         SECTION 10.5      CERTIFICATES OF THE COMPANY.............................................      88
         SECTION 10.6      AUTHORIZATION OF ACTIONS TO BE TAKEN BY THE TRUSTEE
                           UNDER THE COLLATERAL AGREEMENTS.........................................      89
         SECTION 10.7      AUTHORIZATION OF RECEIPT OF FUNDS BY THE TRUSTEE
                           UNDER THE COLLATERAL AGREEMENTS.........................................      89
         SECTION 10.8      GUARANTEES..............................................................      89
         SECTION 10.9      EXECUTION AND DELIVERY OF GUARANTEES....................................      91
         SECTION 10.10     GUARANTORS MAY CONSOLIDATE, ETC., ON CERTAIN TERMS......................      91
         SECTION 10.11     RELEASE OF GUARANTORS...................................................      92
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         SECTION 10.12     LIMITATION OF GUARANTOR'S LIABILITY; CERTAIN
                           BANKRUPTCY EVENTS .....................................................       93
         SECTION 10.13     APPLICATION OF CERTAIN TERMS AND PROVISIONS TO
                           THE GUARANTORS.........................................................       93
         SECTION 10.14     SUBORDINATION OF GUARANTEES............................................       94

ARTICLE XI
         SUBORDINATION............................................................................       94
         SECTION 11.1      NOTES SUBORDINATED TO SENIOR INDEBTEDNESS..............................       94
         SECTION 11.2      NO PAYMENT ON NOTES IN CERTAIN CIRCUMSTANCES...........................       94
         SECTION 11.3      NOTES SUBORDINATED TO PRIOR PAYMENT IN FULL OF
                           ALL SENIOR INDEBTEDNESS ON DISSOLUTION, LIQUIDATION
                           OR REORGANIZATION......................................................       95
         SECTION 11.4      PAYMENTS OR DISTRIBUTIONS TO BE HELD IN TRUST
                           FOR THE BENEFIT OF HOLDERS OF DESIGNATED SENIOR
                           INDEBTEDNESS...........................................................       96
         SECTION 11.5      HOLDERS TO BE SUBROGATED TO RIGHTS OF HOLDERS
                           OF SENIOR INDEBTEDNESS AND DESIGNATED SENIOR
                           INDEBTEDNESS...........................................................       96
         SECTION 11.6      RELATIVE RIGHTS........................................................       97
         SECTION 11.7      TRUSTEE ENTITLED TO ASSUME PAYMENTS NOT
                           PROHIBITED IN ABSENCE OF NOTICE........................................       97
         SECTION 11.8      APPLICATION BY TRUSTEE OF ASSETS DEPOSITED WITH IT.....................       98
         SECTION 11.9      SUBORDINATION RIGHTS NOT IMPAIRED BY ACTS OR
                           OMISSIONS OF THE COMPANY, THE GUARANTORS OR
                           HOLDERS OF SENIOR INDEBTEDNESS AND DESIGNATED
                           SENIOR INDEBTEDNESS....................................................       98
         SECTION 11.10     HOLDERS AUTHORIZE TRUSTEE TO EFFECTUATE
                           SUBORDINATION OF NOTES.................................................       99
         SECTION 11.11     RIGHT OF TRUSTEE TO HOLD SENIOR INDEBTEDNESS
                           AND DESIGNATED SENIOR INDEBTEDNESS.....................................       99
         SECTION 11.12     ARTICLE XI NOT TO PREVENT EVENTS OF DEFAULT............................       99
         SECTION 11.13     NO FIDUCIARY DUTY OF TRUSTEE AND HOLDERS OF
                           SENIOR INDEBTEDNESS....................................................      100

ARTICLE XII
         MISCELLANEOUS............................................................................     100
         SECTION 12.1      TRUST INDENTURE ACT CONTROLS...........................................     100
         SECTION 12.2      NOTICES................................................................     100
         SECTION 12.3      COMMUNICATION BY HOLDERS OF NOTES WITH OTHER
                           HOLDERS OF NOTES ......................................................     101

         SECTION 12.4      CERTIFICATE AND OPINION AS TO CONDITIONS PRECEDENT.....................     101
         SECTION 12.5      STATEMENTS REQUIRED IN CERTIFICATE OR OPINION..........................     102
         SECTION 12.6      RULES BY TRUSTEE AND AGENTS ...........................................     102
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         SECTION 12.7      NO PERSONAL LIABILITY OF DIRECTORS, OFFICERS,
                           EMPLOYEES AND STOCKHOLDERS.............................................     102
         SECTION 12.8      GOVERNING LAW .........................................................     103
         SECTION 12.9      NO ADVERSE INTERPRETATION OF OTHER AGREEMENTS .........................     103
         SECTION 12.10     SUCCESSORS ............................................................     103
         SECTION 12.11     SEVERABILITY ..........................................................     103
         SECTION 12.12     COUNTERPART ORIGINALS..................................................     103
         SECTION 12.13     TABLE OF CONTENTS, HEADINGS, ETC.......................................     103

EXHIBIT A

         [FORM OF NOTE]...........................................................................     A-1

EXHIBIT B

         FORM OF UNIT CERTIFICATE.................................................................     B-1

EXHIBIT C
         FORM OF CERTIFICATE OF TRANSFER..........................................................     C-1

EXHIBIT D
         FORM OF CERTIFICATE OF EXCHANGE..........................................................     D-1

EXHIBIT E

         FORM OF CERTIFICATE FROM ACQUIRING
         INSTITUTIONAL ACCREDITED INVESTOR........................................................     E-1

EXHIBIT F
         FORM OF SUPPLEMENTAL INDENTURETO BE
         DELIVERED BY SUBSEQUENTGUARANTORS........................................................     F-1

EXHIBIT G

         FORM OF INTERCREDITOR AGREEMENT..........................................................     G-1
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                             CROSS-REFERENCE TABLE*

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TIA SECTION                                                                                            INDENTURE SECTION
-----------                                                                                            -----------------
<S>                                                                                               <C>
310(a)(1)...................................................................................                 7.10
   (a)(2)...................................................................................                 7.10
   (a)(3)...................................................................................                 N.A.
   (a)(4)...................................................................................                 N.A.
   (a)(5)...................................................................................            7.8; 7.10
   (b)......................................................................................      7.8; 7.10; 12.2
   (c)......................................................................................                 N.A.
311(a)......................................................................................                 7.11
   (b)......................................................................................                 7.11
   (c)......................................................................................                 N.A.
312(a)......................................................................................                  2.5
   (b)......................................................................................                 12.3
   (c)......................................................................................                 12.3
313(a)......................................................................................                  7.6
   (b)(1)...................................................................................                 N.A.
   (b)(2)...................................................................................             7.6; 7.7
   (c)......................................................................................       7.5; 7.6; 12.2
   (d)......................................................................................                  7.6
314(a)......................................................................................      4.3; 4.4; 12.2
   (b)......................................................................................                 10.3
   (c)(1)...................................................................................                 12.4
   (c)(2)...................................................................................                 12.4
   (c)(3)...................................................................................                 N.A.
   (d)......................................................................................                 10.5
   (e)......................................................................................                 12.5
   (f)......................................................................................                 N.A.
315(a)......................................................................................               7.1(b)
   (b)......................................................................................            7.5; 12.2
   (c)......................................................................................               7.1(a)
   (d)......................................................................................               7.1(c)
   (e)......................................................................................                 6.11
316(a)(last sentence).......................................................................                  2.9
   (a)(1)(A)................................................................................                  6.5
   (a)(1)(B)................................................................................                  6.4
   (a)(2)...................................................................................                 N.A.
   (b)......................................................................................                  6.7
   (c)......................................................................................                  9.4
317(a)(1)...................................................................................                  6.8
   (a)(2)...................................................................................                  6.9
   (b)......................................................................................                  2.4
318(a)......................................................................................                 12.1
   (c)......................................................................................                 12.1
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N.A. means not applicable
*This Cross-Reference table shall not, for any purpose, be deemed to be part of
this Indenture.

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                  INDENTURE, dated as of August 22, 2002, among Orbital Sciences
Corporation, a Delaware corporation (the "Company"), the Guarantor (as defined),
and U.S. Bank, N.A., as trustee (the "Trustee").

                  Each party agrees as follows for the benefit of each other and
for the equal and ratable benefit of the Holders of the 12% Series A Second
Priority Secured Notes due 2006 (the "Series A Notes") and the 12% Series B
Second Priority Secured Notes due 2006 (the "Series B Notes" and, together with
the Series A Notes, the "Notes"):

                                    ARTICLE I
                          DEFINITIONS AND INCORPORATION
                                  BY REFERENCE

SECTION 1.1       DEFINITIONS

                  "144A Global Note" means one or more Global Notes bearing the
Private Placement Legend, that will be issued in an aggregate amount of
denominations equal in total to the outstanding principal amount of the Notes
sold in reliance on Rule 144A.

                  "501 Global Note" means one of more Global Notes bearing the
Private Placement Legend that will be issued in an aggregate amount of
denominations equal in total to the outstanding principal amount of the Notes
sold to institutional "accredited investors" within the meaning of Rule
501(a)(1), (2), (3), or (7) of the Securities Act.

                  "Accrued Bankruptcy Interest" means, with respect to any
Indebtedness, all interest accruing thereon after the filing of a petition by or
against the Company or any of its Subsidiaries under any Bankruptcy Law, in
accordance with and at the rate (including any rate applicable upon any default
or event of default, to the extent lawful) specified in the documents evidencing
or governing such Indebtedness, whether or not the claim for such interest is
allowed as a claim after such filing in any proceeding under such Bankruptcy
Law.

                  "Acquired Indebtedness" means Indebtedness (including
Disqualified Capital Stock) of any Person existing at the time such Person
becomes a Subsidiary of the Company, including by designation, or is merged or
consolidated into or with the Company or one of its Subsidiaries.

                  "Acquisition" means the purchase or other acquisition of any
Person (or any business for which then current audited financial statements are
available) or all or substantially all the assets of any Person by any other
Person, whether by purchase, merger, consolidation, or other transfer, and
whether or not for consideration.

                  "Affiliate" means any Person directly or indirectly
controlling or controlled by or under direct or indirect common control with the
Company. For purposes of this definition, the term "control" means the power to
direct the management and policies of a Person, directly or through one or more
intermediaries, whether through the ownership of voting securities, by contract,
or otherwise; provided, that with respect to ownership interest in the Company
and its Subsidiaries, a Beneficial Owner of 10% or more of the total voting
power normally entitled to vote in the election of directors, managers or
trustees, as applicable, shall for such purposes be

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deemed to possess control. Notwithstanding the foregoing, "Affiliate" shall not
include Wholly Owned Subsidiaries.

                  "Agent" means any Registrar, Paying Agent or co-registrar.

                  "Applicable Procedures" means, with respect to any transfer or
exchange of or for beneficial interests in any Global Note, the rules and
procedures of the Depositary, Euroclear and Clearstream that apply to such
transfer or exchange at the relevant time.

                  "Attributable Indebtedness" in respect of a sale-leaseback
transaction means, at the time of determination, the present value of the
obligation of the lessee for net rental payments during the remaining term of
the lease included in such sale-leaseback transaction including any period for
which such lease has been extended or may, at the option of the lessor, be
extended. Such present value shall be calculated using a discount rate equal to
the rate of interest implicit in such transaction, determined in accordance with
GAAP.

                  "Average Life" means, as of the date of determination, with
respect to any security or instrument, the quotient obtained by dividing (1) the
sum of the products (a) of the number of years (calculated to the nearest
one-twelfth) from the date of determination to the date or dates of each
successive scheduled principal (or redemption) payment of such security or
instrument and (b) the amount of each such respective principal (or redemption)
payment by (2) the sum of all such principal (or redemption) payments.

                  "Bankruptcy Code" means the United States Bankruptcy Code,
codified at 11 U.S.C. Section 101-1330, as amended.

                  "Bankruptcy Law" means Title 11, U.S. Code, or any similar
Federal, state or foreign law for the relief of debtors.

                  "Beneficial Owner" or "beneficial owner" for purposes of the
definition of Change of Control and Affiliate has the meaning attributed to it
in Rules 13d-3 and 13d-5 under the Exchange Act (as in effect on the Issue
Date), whether or not otherwise applicable.

                  "Board of Directors" means, with respect to any Person, the
board of directors (or, if such Person is not a corporation, the equivalent
board of managers or members or body performing similar functions for such
Person) of such Person or any committee of the Board of Directors of such Person
authorized, with respect to any particular matter, to exercise the power of the
board of directors of such Person.

                  "Broker-Dealer" means any broker-dealer that receives Exchange
Notes for its own account in the Exchange Offer in exchange for Notes that were
acquired by such broker-dealer as a result of market-making or other trading
activities.

                  "Business Day" means each Monday, Tuesday, Wednesday, Thursday
and Friday which is not a day on which banking institutions in New York, New
York are authorized or obligated by law or executive order to close.

                  "Capitalized Lease Obligation" means, as to any Person, the
obligations of such Person under a lease that are required to be classified and
accounted for as capital lease

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obligations under GAAP and, for purposes of this definition, the amount of such
obligations at any date shall be the capitalized amount of such obligations at
such date, determined in accordance with GAAP.

                  "Capital Stock" means, with respect to any corporation, any
and all shares, interests, rights to purchase (other than convertible or
exchangeable Indebtedness that is not itself otherwise capital stock), warrants,
options, participations or other equivalents of or interests (however
designated) in stock issued by that corporation.

                  "Cash Equivalent" means:

                  (1) securities issued or directly and fully guaranteed or
insured by the United States of America or any agency or instrumentality thereof
(provided, that the full faith and credit of the United States of America is
pledged in support thereof);

                  (2) time deposits, certificates of deposit, bankers'
acceptances and commercial paper issued by the parent corporation of any
domestic commercial bank of recognized standing having capital and surplus in
excess of $500,000,000;

                  (3) commercial paper issued by others rated at least A-2 or
the equivalent thereof by Standard & Poor's Corporation or at least P-2 or the
equivalent thereof by Moody's Investors Service, Inc.;

                  (4) repurchase obligations with a term of not more than seven
days for underlying securities of the types described in (1) and (2) above
entered into with any financial institution meeting the qualifications specified
in (2) above; or

                  (5) money market funds, substantially all of the assets of
which constitute Cash Equivalents of the kinds described in (1) through (4) of
this definition;

and in the case of each of (1), (2), and (3) maturing within one year after the
date of acquisition.

                  "Change of Control" means: (i) any merger or consolidation of
the Company with or into any Person or any sale, transfer or other conveyance,
whether direct or indirect, of all or substantially all of the Company's assets,
on a consolidated basis, in one transaction or a series of related transactions,
if immediately after giving effect to such transaction(s), any Person is or
becomes the Beneficial Owner, directly or indirectly, of more than 50% of the
aggregate Voting Equity Interests of the transferee(s) or surviving entity or
entities; (ii) any Person is or becomes the Beneficial Owner, directly or
indirectly, of more than 50% of the voting power of the aggregate Voting Equity
Interests of the Company; (iii) the Continuing Directors cease for any reason to
constitute a majority of the Company's Board of Directors then in office; (iv)
the Company adopts a plan of liquidation; or (v) any merger or consolidation of
the Company with or into another Person or the merger of another Person with or
into the Company, or the sale of all or substantially all of the Company's
assets to another Person, if the Company's securities that are outstanding
immediately prior to such transaction and which represent 100% of the aggregate
voting power of the Company's Voting Equity Interests are changed into or
exchanged for, cash, securities or property, unless pursuant to such transaction
such securities are changed into or exchanged for, in addition to any other
consideration, securities of the Surviving Person or transferee that represent,
immediately after such

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transaction, a majority of the aggregate voting power of the Voting Equity
Interests of the Surviving Person or transferee. As used in this definition,
"Person" (including any group that is deemed to be a "person") has the meaning
given by Section 13(d) of the Exchange Act, whether or not applicable.

                  "Clearstream" means Clearstream Banking Luxembourg, or its
successors.

                  "Collateral" means (i) the "Collateral" (as defined in the
Pledge and Security Agreement) and (ii) the real property securing the Mortgage.

                  "Collateral Agent" means the collateral agent and/or trustee
under the Collateral Agreements.

                  "Collateral Agreements" means, collectively, that certain
Pledge and Security Agreement, the Mortgage and any other agreements,
instruments, financing statements or other documents that evidence, set forth or
limit the Lien of the Trustee in the Collateral as all of such agreements,
instruments, financing statements or other documents may be amended,
supplemented or replaced in accordance with the terms of this Indenture.

                  "Consolidation" means, with respect to the Company, the
consolidation of the accounts of the Subsidiaries with those of the Company, all
in accordance with GAAP; provided, that "consolidation" will not include
consolidation of the accounts of any Unrestricted Subsidiary with the accounts
of the Company. The term "consolidated" has a correlative meaning to the
foregoing.

                  "Consolidated EBITDA" means, with respect to any Person, for
any period, the Consolidated Net Income of such Person for such period adjusted
to add thereto (to the extent deducted from net revenues in determining
Consolidated Net Income), without duplication, the sum of:

                  (1) Consolidated income tax expense;

                  (2) Consolidated depreciation and amortization expense;

                  (3) Consolidated Interest Expense; and

                  (4) all other non-cash charges attributable to the grant,
exercise or repurchase of options for or shares of Qualified Capital Stock to or
from employees of such Person and its Consolidated Subsidiaries;

less the amount of all cash payments made by such Person or any of its
Subsidiaries during such period to the extent such payments relate to non-cash
charges that were added back in determining Consolidated EBITDA for such period
or any prior period; provided, that consolidated income tax expense and
depreciation and amortization of a Subsidiary that is a less than a Wholly Owned
Subsidiary shall only be added to the extent of the equity interest of the
Company in such Subsidiary.

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                  "Consolidated Interest Expense" of any Person means, for any
period, the aggregate amount (without duplication and determined in each case in
accordance with GAAP) of:

                  (a) interest expensed or capitalized, paid, accrued, or
scheduled to be paid or accrued (including, in accordance with the following
sentence, interest attributable to Capitalized Lease Obligations) of such Person
and its Consolidated Subsidiaries during such period, including (1) original
issue discount and non-cash interest payments or accruals on any Indebtedness;
(2) the interest portion of all deferred payment obligations; and (3) all
commissions, discounts and other fees and charges owed by such Person or its
Consolidated Subsidiaries and not reimbursed by third parties with respect to
bankers' acceptances and letters of credit financings and currency and Interest
Swap and Hedging Obligations, in each case to the extent attributable to such
period; and

                  (b) the amount of dividends accrued or payable (or guaranteed)
by such Person or any of its Consolidated Subsidiaries (other than dividends
paid in shares of Qualified Capital Stock) in respect of Preferred Stock (other
than by Subsidiaries of the Company to the Company or a Guarantor).

For purposes of this definition, (x) interest on a Capitalized Lease Obligation
shall be deemed to accrue at an interest rate reasonably determined in good
faith by the Company to be the rate of interest implicit in such Capitalized
Lease Obligation in accordance with GAAP and (y) interest expense attributable
to any Indebtedness represented by the guaranty by such Person or a Subsidiary
of such Person of an obligation of another Person shall be deemed to be the
interest expense attributable to the Indebtedness guaranteed.

                  "Consolidated Net Income" means, with respect to any Person
for any period, the net income (or loss) of such Person and its Consolidated
Subsidiaries (determined on a consolidated basis in accordance with GAAP) for
such period, adjusted to exclude (only to the extent included in computing such
net income (or loss) and without duplication):

                  (a) all gains (but not losses (other than any loss resulting
from the Company's sale of its Transportation Management Systems business
segment, which shall be excluded from Consolidated Net Income)) which are either
extraordinary (as determined in accordance with GAAP) or are either unusual or
nonrecurring (including any gain from the sale or other disposition of assets
outside the ordinary course of business or from the issuance or sale of any
capital stock), together with any related provisions for taxes on any such
extraordinary, unusual or non-recurring gain; provided that gains attributable
to payments from mission success insurance policies shall not be excluded to the
extent of any offsetting loss incurred during such period resulting from the
failure to which such policy payment relates;

                  (b) the net income, if positive, of any Person, other than a
Consolidated Subsidiary, in which such Person or any of its Consolidated
Subsidiaries has an interest, and the net income or loss of ORBIMAGE, except, in
each case, to the extent of the amount of any dividends or distributions
actually paid in cash to such Person or a Consolidated Subsidiary of such Person
during such period, but in any case not in excess of such Person's pro rata
share of such Person's net income for such period;

                                        5
<PAGE>
                  (c) the net income or loss of any Person acquired in a pooling
of interests transaction for any period prior to the date of such acquisition;

                  (d) the net income, if positive, of any of such Person's
Consolidated Subsidiaries to the extent that the declaration or payment of
dividends or similar distributions is not at the time permitted by operation of
the terms of its charter or bylaws or any other agreement, instrument, judgment,
decree, order, statute, rule or governmental regulation applicable to such
Consolidated Subsidiary;

                  (e) all dividends and distributions from any Unrestricted
Subsidiary for such period that are a net reduction in Investments of such
Person made in such Unrestricted Subsidiary;

                  (f) the cumulative effect of any change in accounting
principles; and

                  (g) the amortization of original issue discount on the Notes,
including the discount associated with the value of the Warrants, to the extent
such amount is not paid in cash.

                  "Consolidated Net Worth" of any Person at any date means the
aggregate consolidated stockholders' equity of such Person (plus amounts of
equity attributable to preferred stock) and its Consolidated Subsidiaries, as
would be shown on the consolidated balance sheet of such Person prepared in
accordance with GAAP, adjusted to exclude (to the extent included in calculating
such equity) (a) the amount of any such stockholders' equity attributable to
Disqualified Capital Stock or treasury stock of such Person and its Consolidated
Subsidiaries; (b) all upward revaluations and other write-ups in the book value
of any asset of such Person or a Consolidated Subsidiary of such Person
subsequent to the Issue Date; and (c) all investments in Subsidiaries that are
not Consolidated Subsidiaries and in Persons that are not Subsidiaries.

                  "Consolidated Subsidiary" means, for any Person, each
Subsidiary of such Person (whether now existing or hereafter created or
acquired) the financial statements of which are consolidated for financial
statement reporting purposes with the financial statements of such Person in
accordance with GAAP.

                  "Continuing Director" means during any period of 12
consecutive months after the Issue Date, individuals who at the beginning of any
such 12-month period constituted the Board of Directors of the Company (together
with any new directors whose election by such Board of Directors or whose
nomination for election by the shareholders of the Company was approved by a
vote of a majority of the directors then still in office who were either
directors at the beginning of such period or whose election or nomination for
election was previously so approved, including new directors designated in or
provided for in an agreement regarding the merger, consolidation or sale,
transfer or other conveyance, of all or substantially all of the assets of the
Company, if such agreement was approved by a vote of such majority of
directors).

                  "Corporate Trust Office" shall be at the address of the
Trustee specified in Section 12.2 hereof or such other address as to which the
Trustee may give notice to the Company.

                                        6
<PAGE>
                  "Credit Agreement" means the credit agreement, dated March 1,
2002, by and among the Company, certain of its Subsidiaries, certain financial
institutions and Foothill Capital Corporation, as arranger and agent, including
any related notes, guarantees, collateral documents, instruments and agreements
executed in connection therewith, as such credit agreement and/or related
documents may be amended, restated, supplemented, renewed, replaced or otherwise
modified from time to time whether or not with the same agent, trustee,
representative lenders or holders, and, subject to the proviso to the next
succeeding sentence, irrespective of any changes in the terms and conditions
thereof. Without limiting the generality of the foregoing, the term "Credit
Agreement" shall include one or more agreements in respect of Interest Swap and
Hedging Obligations and letter of credit facilities with lenders (or Affiliates
thereof) party to the Credit Agreement and shall also include any amendment,
amendment and restatement, renewal, extension, restructuring, supplement or
modification to any Credit Agreement and all refundings, refinancings and
replacements of any Credit Agreement, including any credit agreement:

                  (1) extending the maturity of any Indebtedness incurred
thereunder or contemplated thereby;

                  (2) adding or deleting borrowers or guarantors thereunder, so
long as borrowers and issuers include one or more of the Company and its
Subsidiaries and their respective successors and assigns;

                  (3) increasing the amount of Indebtedness incurred thereunder
or available to be borrowed thereunder; provided, that on the date such
Indebtedness is incurred it would not be prohibited by Section 4.7; or

                  (4) otherwise altering the terms and conditions thereof in a
manner not prohibited by the terms of this Indenture.

                  "Default" means any event that is or with the passage of time
or the giving of notice or both would be an Event of Default.

                  "Definitive Note" means one or more certificated Notes
registered in the name of the Holder thereof and issued in accordance with
Section 2.6 hereof, in the form of Exhibit A hereto except that such Note shall
not include the information called for by footnotes 3, 4 and 9 thereof.

                  "Depositary" means, with respect to the Global Notes, the
Person specified in Section 2.3 hereof as the Depositary with respect to the
Notes, until a successor will have been appointed and become such pursuant to
the applicable provisions of this Indenture, and thereafter "Depositary" will
mean or include such successor.

                  "Designated Senior Indebtedness" means the Credit Agreement.

                  "Disqualified Capital Stock" means with respect to any Person,
(a) any Equity Interests of such Person that, by its terms or by the terms of
any security into which it is convertible, exercisable or exchangeable, is, or
upon the happening of an event or the passage of time or both would be, required
to be redeemed or repurchased, including at the option of the holder thereof, by
such Person or any of its Subsidiaries, in whole or in part, on or prior to 91

                                        7
<PAGE>
days following the Stated Maturity of the Notes and (b) any Equity Interests of
any Subsidiary of such Person other than any common equity with no preferences,
privileges, and no redemption or repayment provisions. Notwithstanding the
foregoing, any Equity Interests that would constitute Disqualified Capital Stock
solely because the holders thereof have the right to require the Company to
repurchase such Equity Interests upon the occurrence of a change of control or
an asset sale shall not constitute Disqualified Capital Stock if the terms of
such Equity Interests provide that the Company may not repurchase or redeem any
such Equity Interests pursuant to such provisions prior to the Company's
purchase of the Notes as are required to be purchased pursuant to Section 4.13
and Section 4.16. Capital Stock subject to repurchase obligations pursuant to
employee benefit plans of the Company or its Subsidiaries shall not be
considered Disqualified Capital Stock.

                  "Distribution Compliance Period" means the 40-day restricted
period as defined in Regulation S.

                  "Equity Interests" means Capital Stock or partnership,
participation or membership interests and all warrants, options or other rights
to acquire Capital Stock or partnership, participation or membership interests
(but excluding any debt security that is convertible into, or exchangeable for,
Capital Stock or partnership, participation or membership interests).

                  "Euroclear" means Euroclear Bank S.A./N.V., or its successor,
as operator of the Euroclear system.

                  "Event of Loss" means, with respect to any property or asset,
any (1) loss, destruction or damage of such property or asset or (2) any
condemnation, seizure or taking, by exercise of the power of eminent domain or
otherwise, of such property or asset, or confiscation or requisition of the use
of such property or asset.

                  "Exchange Act" means the Securities Exchange Act of 1934, as
amended.

                  "Exchange Notes" means 12% Series B Second Priority Secured
Notes due 2006, of the Company, including the guarantees endorsed thereon,
identical in all respects to the Notes and the Guarantees, except for references
to series and restrictive legends, issued pursuant to an Exchange Offer.

                  "Exchange Offer" means an offer that may be made by the
Company pursuant to the Note Registration Rights Agreement to exchange Exchange
Notes for Series A Notes.

                  "Exchange Offer Registration Statement" shall have the meaning
set forth in the Note Registration Rights Agreement.

                  "Excluded Assets" has the meaning ascribed to "Excluded
Collateral" in the Pledge and Security Agreement.

                  "Exempted Affiliate Transaction" means (a) customary employee
compensation arrangements (including employment agreements) approved by a
majority of independent (as to such transactions) members of the Board of
Directors of the Company and customary directors' fees; (b) dividends permitted
under Section 4.9 and payable, in form and amount, on

                                        8
<PAGE>
a pro rata basis to all holders of common stock of the Company; (c) transactions
solely between or among the Company and any of its Consolidated Subsidiaries or
solely among Consolidated Subsidiaries of the Company; (d) agreements entered
into pursuant to a plan approved by a bankruptcy court with respect to ORBIMAGE,
and (e) the purchase or sale of Common Stock by the Company from or to an
Affiliate at a price per share equal to or less than the average closing price
for the Common Stock as reported or quoted on a national securities exchange or
national interdealer quotation system during the five trading days immediately
preceding the date of such transaction.

                  "Existing Indebtedness" means the Indebtedness of the Company
and its Subsidiaries (other than Indebtedness under the Credit Agreement) in
existence on the Issue Date (after giving effect to the repayment or repurchase
of the Company's 5% Convertible Notes due 2002), reduced to the extent such
amounts are repaid, refinanced or retired.

                  "fair market value" means the price that would be paid in an
arm's-length transaction between an informed and willing seller under no
compulsion to sell and an informed and willing buyer under no compulsion to buy,
as determined in good faith by the Company.

                  "GAAP" means United States generally accepted accounting
principles set forth in the opinions and pronouncements of the Accounting
Principles Board of the American Institute of Certified Public Accountants and
statements and pronouncements of the Financial Accounting Standards Board or in
such other statements by such other entity as approved by a significant segment
of the accounting profession in the United States as in effect from time to
time.

                  "Global Notes" means one or more Notes in the form of Exhibit
A hereto that includes the information referred to in footnotes 3, 4 and 9 to
the form of Note, attached hereto as Exhibit A, issued under this Indenture,
that is deposited with (or held on behalf of) and registered in the name of the
Depositary or its nominee.

                  "Global Note Legend" means the legend set forth in Section
2.6(g)(2) hereof, which is required to be placed on all Global Notes issued
under this Indenture.

                  "Guarantee" means a guarantee (other than by endorsement of
negotiable instruments for collection in the ordinary course of business),
direct or indirect, in any manner, of all or any part of any Indebtedness
(including, without limitation, letters of credit and reimbursement agreements
in respect thereof). When used with respect to the Notes, a "Guarantee" means a
guarantee by the Guarantors of all or any part of the Notes, in accordance with
Article X hereof.

                  "Guarantor" means each of the Company's present and future
Subsidiaries that at the time are guarantors of the Notes in accordance with
this Indenture. As of the Issue Date, the only Guarantor is Orbital
International, Inc.

                  "Holder" means a Person in whose name a Note is registered on
the Registrar's books.

                  "Indebtedness" of any Person means, without duplication,

                                        9
<PAGE>
                  (a) all liabilities and obligations, contingent or otherwise,
of such Person, to the extent such liabilities and obligations would appear as a
liability upon the consolidated balance sheet of such Person in accordance with
GAAP, (1) in respect of borrowed money (whether or not the recourse of the
lender is to the whole of the assets of such Person or only to a portion
thereof); (2) evidenced by bonds, notes, debentures or similar instruments; or
(3) representing the balance deferred and unpaid of the purchase price of any
property or services, except those incurred in the ordinary course of its
business that would ordinarily constitute a trade payable to trade creditors
(other than accounts payable or other obligations to trade creditors which have
remained unpaid for greater than 90 days past their original due date unless
such accounts payable or other obligations are being contested in good faith, in
which case they will not constitute Indebtedness pending final resolution of
such dispute);

                  (b) all liabilities and obligations, contingent or otherwise,
of such Person (1) evidenced by bankers' acceptances or similar instruments
issued or accepted by banks, (2) relating to any Capitalized Lease Obligation,
or (3) evidenced by a letter of credit or a reimbursement obligation of such
Person with respect to any letter of credit;

                  (c) all net obligations of such Person under Interest Swap and
Hedging Obligations;

                  (d) all liabilities and obligations of others of the kind
described in the preceding clauses (a), (b) or (c) that such Person has
guaranteed or provided credit support or that are otherwise its legal liability
or which are secured by any assets or property of such Person;

                  (e) any and all deferrals, renewals, extensions, refinancings
and refundings (whether direct or indirect) of, or amendments, modifications or
supplements to, any liability of the kind described in any of the preceding
clauses (a), (b), (c) or (d), or this clause (e), whether or not between or
among the same parties; and

                  (f) all Disqualified Capital Stock of such Person (measured at
the greater of its voluntary or involuntary maximum fixed repurchase price plus
accrued and unpaid dividends).

                  For purposes hereof, the "maximum fixed repurchase price" of
any Disqualified Capital Stock which does not have a fixed repurchase price
shall be calculated in accordance with the terms of such Disqualified Capital
Stock as if such Disqualified Capital Stock were purchased on any date on which
Indebtedness shall be required to be determined pursuant to this Indenture, and
if such price is based upon, or measured by, the fair market value of such
Disqualified Capital Stock, such fair market value shall be determined in good
faith by the board of directors of the issuer (or managing general partner of
the issuer) of such Disqualified Capital Stock.

                  The amount of any Indebtedness outstanding as of any date
shall be (1) the accreted value thereof, in the case of any Indebtedness issued
with original issue discount, but the accretion of original issue discount in
accordance with the original terms of Indebtedness issued with an original issue
discount will not be deemed to be an incurrence and (2) the principal amount
thereof, together with any interest and fees thereon that are more than 30 days
past due, in the case of any other Indebtedness.

                                       10
<PAGE>
                  "Indenture" means this Indenture, as amended or supplemented
from time to time in accordance with the terms hereof.

                  "Indirect Participant" means an entity that, with respect to
DTC, clears through or maintains a direct or indirect custodial relationship
with a Participant.

                  "Initial Purchasers" mean the initial purchasers of the Series
A Notes under the Purchase Agreement, dated August 9, 2002, with respect to the
Series A Notes.

                  "Institutional Accredited Investor" means an institution that
is an "accredited investor" as defined in Rule 501(a)(1), (2), (3) or (7) under
the Securities Act, who is not also a QIB.

                  "Intercreditor Agreement" means that certain Intercreditor
Agreement among the Trustee and one or more lenders, substantially in the form
attached hereto as Exhibit G, which is entered into on the Issue Date in
accordance with Section 7.1(f) hereof, and any amended or supplemented agreement
or any replacement or substitute agreement entered into in accordance with this
Indenture.

                  "Interest Coverage Ratio" of any Person on any date of
determination (the "Transaction Date") means the ratio, on a pro forma basis, of
(a) the aggregate amount of Consolidated EBITDA of such Person attributable to
continuing operations and businesses (exclusive of amounts attributable to
operations and businesses permanently discontinued or disposed of) for the
Reference Period to (b) the aggregate Consolidated Interest Expense of such
Person (exclusive of amounts attributable to operations and businesses
permanently discontinued or disposed of, but only to the extent that the
obligations giving rise to such Consolidated Interest Expense would no longer be
obligations contributing to such Person's Consolidated Interest Expense
subsequent to the Transaction Date) during the Reference Period; provided, that
for purposes of such calculation:

                  (1) Acquisitions which occurred during the Reference Period or
subsequent to the Reference Period and on or prior to the Transaction Date shall
be assumed to have occurred on the first day of the Reference Period;

                  (2) transactions giving rise to the need to calculate the
Interest Coverage Ratio shall be assumed to have occurred on the first day of
the Reference Period;

                  (3) the incurrence of any Indebtedness (including issuance of
any Disqualified Capital Stock) during the Reference Period or subsequent to the
Reference Period and on or prior to the Transaction Date (and the application of
the proceeds therefrom to the extent used to refinance or retire other
Indebtedness) (other than Indebtedness incurred under any revolving credit
facility) shall be assumed to have occurred on the first day of the Reference
Period; and

                  (4) the Consolidated Interest Expense of such Person
attributable to interest on any Indebtedness or dividends on any Disqualified
Capital Stock bearing a floating interest (or dividend) rate shall be computed
on a pro forma basis as if the average rate in effect from the beginning of the
Reference Period to the Transaction Date had been the applicable rate for the
entire period, unless such Person or any of its Subsidiaries is a party to an
Interest Swap or

                                       11
<PAGE>
Hedging Obligation (which shall remain in effect for the 12-month period
immediately following the Transaction Date) that has the effect of fixing the
interest rate on the date of computation, in which case such rate (whether
higher or lower) shall be used.

                  "Interest Payment Date" means the stated due date of an
installment of interest on the Notes.

                  "Interest Record Date" means an Interest Record Date specified
in the Notes, whether or not such date is a Business Day.

                  "Interest Swap and Hedging Obligation" means any obligation of
any Person pursuant to any interest rate swap agreement, interest rate cap
agreement, interest rate collar agreement, interest rate exchange agreement,
currency exchange agreement or any other agreement or arrangement designed to
protect against fluctuations in interest rates or currency values, including,
without limitation, any arrangement whereby, directly or indirectly, such Person
is entitled to receive from time to time periodic payments calculated by
applying either a fixed or floating rate of interest on a stated notional amount
in exchange for periodic payments made by such Person calculated by applying a
fixed or floating rate of interest on the same notional amount.

                  "Investment" by any Person in any other Person means (without
duplication):

                  (a) the acquisition (whether by purchase, merger,
consolidation or otherwise) by such Person (whether for cash, property,
services, securities or otherwise) of Equity Interests, Capital Stock, bonds,
notes, debentures or other securities, including any options or warrants, of
such other Person or any agreement to make any such acquisition;

                  (b) the making by such Person of any deposit with, or advance,
loan or other extension of credit to, such other Person (including the purchase
of property from another Person subject to an understanding or agreement,
contingent or otherwise, to resell such property to such other Person) or any
commitment to make any such advance, loan or extension (but excluding accounts
receivable, endorsements for collection or deposits arising in the ordinary
course of business);

                  (c) other than guarantees of Indebtedness of the Company or
any Guarantor to the extent permitted by Section 4.7, the entering into by such
Person of any guarantee of, or other credit support or contingent obligation
with respect to, Indebtedness or other liability of such other Person;

                  (d) the making of any capital contribution by such Person to
such other Person; and

                  (e) the designation by the Board of Directors of the Company
of any Person to be an Unrestricted Subsidiary.

The Company shall be deemed to make an Investment in an amount equal to the fair
market value of the net assets of any Person (or, if neither the Company nor any
of its Subsidiaries has theretofore made an Investment in such Person, in an
amount equal to the Investments being made), at the time that such Person is
designated an Unrestricted Subsidiary, and any property

                                       12
<PAGE>
transferred to an Unrestricted Subsidiary from the Company or a Subsidiary of
the Company shall be deemed an Investment valued at its fair market value at the
time of such transfer. The Company or any of its Subsidiaries shall be deemed to
have made an Investment in a Person that is or was a Subsidiary if, upon the
issuance, sale or other disposition of any portion of the Company's or the
Subsidiary's ownership in the Capital Stock of such Person, such Person ceases
to be a Subsidiary. The fair market value of each Investment shall be measured
at the time made or returned, as applicable.

                  "Issue Date" means the date of first issuance of the Notes
under this Indenture.

                  "Junior Security" means any Qualified Capital Stock or any
Indebtedness of the Company or a Guarantor that:

                  (a) has a final maturity date occurring after the final
maturity date of all Indebtedness outstanding under the Credit Agreement on the
date of issuance of such Qualified Capital Stock or Indebtedness;

                  (b) is unsecured;

                  (c) has an Average Life longer than the security for which
such Qualified Capital Stock or Indebtedness is being exchanged; and

                  (d) by its terms or by law is subordinated to Indebtedness
outstanding under the Credit Agreement on the date of issuance of such Qualified
Capital Stock or Indebtedness at least to the same extent as the Notes.

                  "Legal Holiday" means a day other than a Business Day. If a
payment date is a Legal Holiday, payment may be made at that place on the next
succeeding day that is not a Legal Holiday, and no interest shall accrue for the
intervening period.

                  "Letter of Transmittal" means the letter of transmittal to be
prepared by the Company and sent to all Holders of the Notes for use by such
Holders in connection with the Exchange Offer.

                  "Lien" means any mortgage, charge, pledge, lien (statutory or
otherwise), privilege, security interest, hypothecation or other encumbrance
upon or with respect to any property of any kind, real or personal, movable or
immovable, now owned or hereafter acquired.

                  "Liquidated Damages" means all liquidated damages then owing
pursuant to the Note Registration Rights Agreement.

                  "Moody's" means Moody's Investors Service, Inc. and its
successors.

                  "Mortgage" means the Deed of Trust and Security Agreement,
dated as of the Issue Date, by and among the Company, as grantor, in favor of
Walker Title & Escrow Company, Inc., the trustee, for the benefit of U.S. Bank,
N.A. as Trustee, as beneficiary, and any amended or supplemented deed of trust
and security agreement or any replacement or substitute deed of trust and
security agreement entered into in accordance with this Indenture.

                                       13
<PAGE>
                  "Net Cash Proceeds" means (without duplication) the aggregate
amount of cash or Cash Equivalents received by the Company in the case of a sale
of Qualified Capital Stock and by the Company and its Subsidiaries in respect of
an Asset Sale plus, in the case of an issuance of Qualified Capital Stock upon
any exercise, exchange or conversion of securities (including options, warrants,
rights and convertible or exchangeable debt) of the Company that were issued for
cash after the Issue Date, the amount of cash originally received by the Company
upon the issuance of such securities (including options, warrants, rights and
convertible or exchangeable debt) less, in each case, the sum of all payments,
fees, commissions and (in the case of Asset Sales, reasonable and customary),
expenses (including, without limitation, the fees and expenses of legal counsel
and investment banking fees and expenses) incurred in connection with such Asset
Sale or sale of Qualified Capital Stock, and, in the case of an Asset Sale only,
less (a) the amount (estimated reasonably and in good faith by the Company) of
income, franchise, sales and other applicable taxes required to be paid by the
Company or any of its respective Subsidiaries in connection with such Asset Sale
in the taxable year that such sale is consummated or in the immediately
succeeding taxable year, the computation of which shall take into account the
reduction in tax liability resulting from any available operating losses and net
operating loss carryovers, tax credits and tax credit carryforwards, and similar
tax attributes, and (b) appropriate amounts to be provided by the Company or any
of its Subsidiaries, as the case may be, as a reserve required in accordance
with GAAP against any liability associated with such Asset Sale and retained by
the Company or any such Subsidiary, as the case may be, after such Asset Sale,
including pensions and other post-employment benefit liabilities, liabilities
related to environmental matters and liabilities under any indemnification
obligations associated with such Asset Sale, all as reflected in an Officers'
Certificate delivered to the Trustee; provided, however, that any such amounts
remaining after adjustments, revaluations or liquidations of such reserves shall
constitute Net Cash Proceeds.

                  "Non-Guarantor Subsidiaries" means each of OCC and Orbital
Holdings Corporation, a Delaware corporation.

                  "Non-U.S. Person" means any Person other than a U.S. Person.

                  "Notes Custodian" means the Trustee, as custodian with respect
to the Global Notes, or any successor entity thereto.

                  "Note Registration Rights Agreement" means the Note
Registration Rights Agreement, dated as of the Issue Date, by and among the
Company and the other parties named on the signature pages thereof, as such
agreement may be amended, modified or supplemented from time to time.

                  "Obligation" means any principal, premium or interest payment,
or monetary penalty, or damages, due by the Company or any Guarantor under the
terms of the Notes, this Indenture or the Collateral Agreements, including any
Liquidated Damages due pursuant to the terms of the Note Registration Rights
Agreement.

                  "OCC" means Orbital Communications Corporation, a Delaware
corporation.

                  "Officer" means, with respect to any Person, the Chairman of
the Board, the Chief Executive Officer, the President, the Chief Operating
Officer, the Chief Financial Officer,

                                       14
<PAGE>
the Treasurer, any Assistant Treasurer, the Controller, the Secretary, any
Assistant Secretary or any Vice President of such Person.

                  "Officers' Certificate" means the officers' certificate to be
delivered upon the occurrence of certain events as set forth in this Indenture.

                  "Opinion of Counsel" means an opinion from legal counsel who
is reasonably acceptable to the Trustee, that meets the requirements of Sections
12.4 and 12.5 hereof. The counsel may be an employee of or counsel to the
Company or any Subsidiary of the Company.

                  "ORBIMAGE" means Orbital Imaging Corporation, a Delaware
corporation.

                  "Participant" means, with respect to the Depositary, Euroclear
or Clearstream, a Person who has an account with the Depositary, Euroclear or
Clearstream, respectively (and, with respect to The Depository Trust Company,
shall include Euroclear and Clearstream).

                  "Permitted Indebtedness" means that:

                  (a) the Company and the Guarantors may incur Indebtedness
evidenced by the Notes and the Guarantees issued pursuant to this Indenture up
to the amounts being issued on the original Issue Date less any amounts repaid
or retired;

                  (b) the Company and its Subsidiaries, as applicable, may incur
Refinancing Indebtedness with respect to any Existing Indebtedness or, with
respect to the Company and the Guarantors, any Indebtedness (including
Disqualified Capital Stock) described in clause (a) or incurred pursuant to the
Debt Incurrence Ratio test of Section 4.7 hereof, or which was refinanced
pursuant to this clause (b);

                  (c) the Company and its Subsidiaries may incur Indebtedness
solely in respect of bankers acceptances, letters of credit and completion
guarantees (to the extent that such incurrence does not result in the incurrence
of any obligation to repay any obligation relating to borrowed money or other
Indebtedness), all in the ordinary course of business in accordance with
customary industry practices, in amounts and for the purposes customary in the
Company's industry; provided, that the aggregate principal amount outstanding of
such Indebtedness (including Refinancing Indebtedness and any other Indebtedness
issued to retire, refund, defease, or replace such Indebtedness and including
any Existing Indebtedness meeting the description of this clause (c)) shall at
no time exceed $10,500,000;

                  (d) (i) the Company may incur Indebtedness owed to (borrowed
from) any Guarantor; (ii) any Guarantor may incur Indebtedness owed to (borrowed
from) any other Guarantor or the Company; and (iii) any Subsidiary may incur
Indebtedness owed to (borrowed from) any Guarantor or the Company; provided,
that (x) in the case of Indebtedness of the Company, such obligations shall be
unsecured and contractually subordinated in all respects to the Company's
obligations pursuant to the Notes and any event that causes such Guarantor no
longer to be a Guarantor (including by designation to be an Unrestricted
Subsidiary) shall be deemed to be a new incurrence by the Company of such
Indebtedness and any guarantor thereof subject to Section 4.7 hereof, (y) in the
case of Indebtedness of a Guarantor, such obligations shall be unsecured and
contractually subordinated in all respects to such Guarantor's obligations
pursuant to such Guarantor's Guarantee and any event that causes the Guarantor
lender no

                                       15
<PAGE>
longer to be a Guarantor (including a designation as an Unrestricted Subsidiary)
shall be deemed to be a new incurrence by such Guarantor borrower of such
Indebtedness and any guarantor thereof subject to Section 4.7 hereof, and (z) in
the case of Indebtedness of a Subsidiary pursuant to clause (iii) such
obligations shall be unsecured and any event that causes the Guarantor lender no
longer to be a Guarantor (including a designation as an Unrestricted Subsidiary)
shall be deemed to be a new incurrence by such Subsidiary borrower of such
Indebtedness and any guarantor thereof subject to Section 4.7 hereof;

                  (e) the Company and the Guarantors may incur Interest Swap and
Hedging Obligations that are incurred for the purpose of fixing or hedging
interest rate or currency risk with respect to any fixed or floating rate
Indebtedness that is permitted by this Indenture to be outstanding or any
receivable or liability the payment of which is determined by reference to a
foreign currency; provided, that the notional amount of any such Interest Swap
and Hedging Obligation does not exceed the principal amount of Indebtedness to
which such Interest Swap and Hedging Obligation relates;

                  (f) the Company and the Guarantors may incur Indebtedness
pursuant to a Credit Agreement in an aggregate amount incurred and outstanding
at any time pursuant to this clause (f) (plus any Refinancing Indebtedness
incurred to retire, defease, refinance, replace or refund such Indebtedness) of
up to $35,000,000 minus the amount of any such Indebtedness (i) retired with the
Net Cash Proceeds from any Asset Sale applied to permanently reduce the
outstanding amounts or the commitments with respect to such Indebtedness
pursuant to Section 4.13(b)(1)(ii) hereof or (ii) assumed by a transferee in an
Asset Sale so long as neither the Company nor such Guarantor continues to be an
obligor under such Indebtedness;

                  (g) the Company and the Guarantors may incur Purchase Money
Indebtedness in an aggregate amount incurred and outstanding at any time
pursuant to this clause (g) (plus any Refinancing Indebtedness incurred to
repay, redeem, discharge, retire, defease, refinance, replace or refund such
Indebtedness) of up to $5,000,000; provided that, in each case, such
Indebtedness shall not constitute more than 100% of the cost of the Company or
the cost of such Guarantor (determined in accordance with GAAP in good faith by
the Board of Directors of the Company), as applicable, of the property so
purchased, constructed, improved or leased with such Purchase Money
Indebtedness; and

                  (h) the Company and the Guarantors may incur Subordinated
Indebtedness not otherwise included as "Permitted Indebtedness" herein, in an
aggregate amount incurred and outstanding at any time pursuant to this clause
(h) (plus any Refinancing Indebtedness incurred to repay, redeem, discharge,
retire, defease, refinance, replace or refund such Indebtedness) of up to
$10,000,000.

                  "Permitted Investment" means:

                  (a) any Investment in any of the Notes;

                  (b) any Investment in Cash Equivalents;

                  (c) intercompany notes to the extent permitted under clause
(i) or (ii) of clause (d) of the definition of "Permitted Indebtedness";

                                       16
<PAGE>
                  (d) any Investment by the Company or any Guarantor in a Person
in a Related Business if as a result of such Investment such Person immediately
becomes a Subsidiary and a Guarantor or such Person is immediately merged with
or into the Company or a Guarantor;

                  (e) other Investments in any Person or Persons (other than
Non-Guarantor Subsidiaries), provided, that after giving pro forma effect to
each such Investment, the aggregate amount of all such Investments made on and
after the Issue Date pursuant to this clause (e) that are outstanding (after
giving effect to any such Investments or any portions thereof that are returned
to the Company or the Guarantor that made such prior Investment, without
restriction, in cash on or prior to the date of any such calculation, but only
up to the amount of the Investment made under this clause (e)) in such Person at
any time does not in the aggregate exceed $20,000,000 (measured by the value
attributed to the Investment at the time made or returned, as applicable);

                  (f) any Investment in any Person in exchange for the Company's
Qualified Capital Stock or the Net Cash Proceeds of any substantially concurrent
sale of the Company's Qualified Capital Stock;

                  (g) Investments pursuant to agreements or obligations of the
Company or a Subsidiary, in effect on the Issue Date and not exceeding
$10,000,000 in the aggregate;

                  (h) prepaid expenses and lease, utility and workers'
compensation, and other similar deposits made in the ordinary course of business
consistent with the Company's past practices;

                  (i) Interest Swap and Hedging Obligations to the extent
permitted under clause (e) of the definition of "Permitted Indebtedness";

                  (j) any Investment made as a result of the receipt of non-cash
consideration from an Asset Sale that was made pursuant to and in compliance
with Section 4.13 herein;

                  (k) Investments made in a Non-Guarantor Subsidiary to pay for
de minimus franchise and other similar taxes and costs associated with
maintaining the existence and good standing of such entities and administrative
costs, which in the aggregate do not exceed $100,000 in any year;

                  (l) stocks, obligations or securities received in satisfaction
of judgments;

                  (m) Investments in the form of advances to employees for
travel, relocation and like expenses, in each case, in the ordinary course of
business, consistent with the Company's past practices; and

                  (n) Investments in the Company's 5% Convertible Subordinated
Notes due 2002; provided that none of such notes are acquired at a price in
excess of 100% of the principal amount plus accrued and unpaid interest.

                  "Permitted Lien" means:

                                       17
<PAGE>
                  (a) Liens existing on the Issue Date;

                  (b) Liens imposed by governmental authorities for taxes,
assessments or other charges not yet subject to penalty or which are being
contested in good faith and by appropriate proceedings, if adequate reserves
with respect thereto are maintained on the books of the Company in accordance
with GAAP;

                  (c) statutory liens of carriers, warehousemen, mechanics,
material men, landlords, repairmen or other like Liens arising by operation of
law in the ordinary course of business provided that (1) the underlying
obligations are not overdue for a period of more than 30 days, or (2) such Liens
are being contested in good faith and by appropriate proceedings and adequate
reserves with respect thereto are maintained on the books of the Company in
accordance with GAAP;

                  (d) Liens securing the performance of bids, trade contracts
(other than borrowed money), leases, statutory obligations, surety and appeal
bonds, performance bonds and other obligations of a like nature incurred in the
ordinary course of business;

                  (e) easements, rights-of-way, zoning, similar restrictions and
other similar encumbrances or title defects which, singly or in the aggregate,
do not in any case materially detract from the value of the property subject
thereto (as such property is used by the Company or any of its Subsidiaries) or
interfere with the ordinary conduct of the business of the Company or any of its
Subsidiaries;

                  (f) pledges or deposits made in the ordinary course of
business in connection with workers' compensation, unemployment insurance and
other types of social security legislation;

                  (g)      Liens securing the Notes and the Guarantees;

                  (h) Liens securing Indebtedness of a Person existing at the
time such Person becomes a Subsidiary or is merged with or into the Company or a
Subsidiary or Liens securing Indebtedness incurred in connection with an
Acquisition, provided, that such Liens were in existence prior to the date of
such acquisition, merger or consolidation, were not incurred in anticipation
thereof, and do not extend to any other assets;

                  (i) Liens arising from Purchase Money Indebtedness incurred
pursuant to the second paragraph of Section 4.7 hereof or clause (g) of the
definition of "Permitted Indebtedness"; provided such Liens relate solely to the
property which is subject to such Purchase Money Indebtedness, and provided,
further than such Liens secure Purchase Money Indebtedness in the aggregate not
greater than: $5,000,000 if measured during the period from the Issue Date to
August 14, 2003, $7,000,000 if measured during the period from August 15, 2003
to August 14, 2004, $9,000,000 if measured during the period from August 15,
2004 to August 14, 2005, and $11,000,000 if measured during the period from
August 15, 2005 to August 15, 2006;

                  (j) leases or subleases granted to other Persons not
materially interfering with the conduct of the business of the Company or any of
its Subsidiaries or materially detracting from the value of the relative assets
of the Company or any Subsidiary;

                                       18
<PAGE>
                  (k) Liens arising from precautionary Uniform Commercial Code
financing statement filings regarding operating leases entered into by the
Company or any of its Subsidiaries in the ordinary course of business;

                  (l) Liens securing Refinancing Indebtedness incurred to
refinance any Indebtedness that was previously so secured in a manner no more
adverse to the Holders of the Notes than the terms of the Liens securing such
refinanced Indebtedness, and provided that the Indebtedness secured is not
increased and the Lien is not extended to any additional assets or property that
would not have been security for the Indebtedness refinanced;

                  (m) Liens securing Indebtedness incurred under the Credit
Agreement incurred pursuant to clause (f) of the definition of "Permitted
Indebtedness"; provided that the Company and its Subsidiaries shall have granted
a Lien in favor of the Collateral Agent on all assets secured by such Credit
Agreement, other than Excluded Assets;

                  (n) Liens in favor of the Company or any Guarantor, which are
assigned to the Collateral Agent for the Notes or a Subsidiary Guarantee, as
applicable;

                  (o) Liens resulting from any judgment or award that is not a
Default under this Indenture;

                  (p) the non-exclusive right granted to Boeing Corporation to
use certain property of the Company pursuant to that certain letter agreement
dated December 4, 2001 between the Company and the Boeing Corporation, as in
effect on the Issue Date;

                  (q) Liens granted to the United States government pursuant to
F.A.R. 52.232-16 and F.A.R. 52.245-5 on certain assets of the Company or any
Guarantor specified in prime contracts between the Company or any Guarantor and
the United States Government or any department, agency, public corporation or
instrumentality of the United States or as specified in subcontracts to which
the Company or any Guarantor is a party;

                  (r) Liens with respect to assets of a Guarantor granted by a
Guarantor to the Company to secure Indebtedness owing to the Company;

                  (s) Liens encumbering property or assets under construction
arising from progress or partial payments by a customer of the Company or its
Subsidiaries relating to such property or assets;

                  (t) Liens in favor of customs and revenue authorities arising
as a matter of law to secure payment of customs duties in connection with the
importation of goods;

                  (u) Liens with respect to cash collateralized letters of
credit incurred pursuant to clause (c) of the definition of "Permitted
Indebtedness";

                  (v) Liens encumbering customary initial deposits and margin
deposits, and other Liens that are either within the general parameters
customary in the industry and incurred in the ordinary course of business, in
each case, securing Indebtedness under Interest Swap and Hedging Obligations
permitted by clause (e) of the definition of "Permitted Indebtedness"; and

                                       19
<PAGE>
                  (w) Liens arising out of conditional sale, title retention,
consignment or similar arrangements for the sale of goods entered into by the
Company or any of its Subsidiaries in the ordinary course of business in
accordance with past practices of the Company and its Subsidiaries prior to the
Issue Date.

                  "Person" or "person" means any corporation, individual,
limited liability company, joint stock company, joint venture, partnership,
limited liability partnership, unincorporated association, governmental
regulatory entity, country, state or political subdivision thereof, trust,
municipality or other entity.

                  "Pledge and Security Agreement" means that certain Pledge and
Security Agreement, dated as of the date hereof, among the Company, each of the
Guarantors party thereto and the Trustee as secured party, and any amended or
supplemented agreement or any replacement or substitute agreement entered into
in accordance with this Indenture.

                  "Preferred Stock" means any Equity Interest of any class or
classes of a Person (however designated) which is preferred as to payments of
dividends, or as to distributions upon any liquidation or dissolution, over
Equity Interests of any other class of such Person.

                  "Private Placement Legend" means the legend set forth in
Section 2.6(g)(1) hereof to be placed on all Notes issued under this Indenture
except where specifically stated otherwise by the provisions of this Indenture.

                  "Pro Forma" or "pro forma" shall have the meaning set forth in
Regulation S-X of the Securities Act, unless otherwise specifically stated
herein.

                  "Public Equity Offering" means an underwritten public offering
of Qualified Capital Stock of the Company pursuant to an effective registration
statement filed under the Securities Act.

                  "Purchase Money Indebtedness" of any Person means any
Indebtedness of such Person to any seller or other Person incurred solely to
finance the acquisition (including in the case of a Capitalized Lease
Obligation, the lease), construction, installation or improvement of any after
acquired real or personal tangible property which, in the reasonable good faith
judgment of the Board of Directors of the Company, is directly related to a
Related Business of the Company and which is incurred substantially concurrently
with such acquisition, construction, installation or improvement and is secured
only by the assets so financed.

                  "QIB" means a "qualified institutional buyer" as defined in
Rule 144A.

                  "Qualified Capital Stock" means any Capital Stock of the
Company that is not Disqualified Capital Stock.

                  "Qualified Exchange" means:

                  (1) any legal defeasance, redemption, retirement, repurchase
or other acquisition of Capital Stock or Indebtedness of the Company or any
Guarantor with the Net Cash Proceeds received by the Company from the
substantially concurrent sale of its Qualified Capital Stock (other than to a
Subsidiary); or

                                       20
<PAGE>
                  (2) any issuance of Qualified Capital Stock of the Company in
exchange for any Capital Stock or Indebtedness of the Company or any Guarantor.

                  "Reference Period" with regard to any Person means the four
full fiscal quarters for which financial statements are available (or such
lesser period during which such Person has been in existence) ended immediately
preceding any date upon which any determination is to be made pursuant to the
terms of the Notes or this Indenture.

                  "Refinancing Indebtedness" means Indebtedness (including
Disqualified Capital Stock) (a) issued in exchange for, or the proceeds from the
issuance and sale of which are used substantially concurrently to repay, redeem,
defease, refund, refinance, replace, discharge or otherwise retire for value, in
whole or in part; or (b) constituting an amendment, modification or supplement
to, or a deferral or renewal of ((a) and (b) above are, collectively, a
"Refinancing"), any Indebtedness (including Disqualified Capital Stock) in a
principal amount or, in the case of Disqualified Capital Stock, liquidation
preference, not to exceed (after deduction of reasonable and customary fees and
expenses incurred in connection with the Refinancing plus the amount of any
premium paid in connection with such Refinancing) the lesser of (1) the
principal amount or, in the case of Disqualified Capital Stock, liquidation
preference, of the Indebtedness (including Disqualified Capital Stock) so
Refinanced and (2) if such Indebtedness being Refinanced was issued with an
original issue discount, the accreted value thereof (as determined in accordance
with GAAP) at the time of such Refinancing; provided, that (A) such Refinancing
Indebtedness shall only be used to refinance outstanding Indebtedness (including
Disqualified Capital Stock) of such Person issuing such Refinancing
Indebtedness; (B) such Refinancing Indebtedness shall (x) not have an Average
Life shorter than the Indebtedness (including Disqualified Capital Stock) to be
so refinanced at the time of such Refinancing (or, if earlier, 91 days after the
Stated Maturity of the Notes), and (y) in all respects, be no less contractually
subordinated or junior, if applicable, to the rights of Holders of the Notes
than was the Indebtedness (including Disqualified Capital Stock) to be
refinanced; (C) such Refinancing Indebtedness shall have a final stated maturity
or redemption date, as applicable, no earlier than the final stated maturity or
redemption date, as applicable, of the Indebtedness (including Disqualified
Capital Stock) to be so refinanced or, if sooner, 91 days after the Stated
Maturity of the Notes; and (D) such Refinancing Indebtedness shall be secured
(if secured) in a manner no more adverse to the Holders of the Notes than the
terms of the Liens (if any) securing such refinanced Indebtedness, including,
without limitation, the amount of Indebtedness secured shall not be increased
(except to the extent of customary fees and expenses incurred in connection with
the Refinancing plus the amount of any premium paid in connection with such
Refinancing).

                  "Reg S Permanent Global Note" means one or more permanent
Global Notes bearing the Private Placement Legend, that will be issued in an
aggregate amount of denominations equal in total to the outstanding principal
amount of the Reg S Temporary Global Note upon expiration of the Distribution
Compliance Period.

                  "Reg S Temporary Global Note" means one or more temporary
Global Notes bearing the Private Placement Legend and the Reg S Temporary Global
Note Legend, issued in an aggregate amount of denominations equal in total to
the outstanding principal amount of the Notes initially sold in reliance on Rule
903 of Regulation S.

                                       21
<PAGE>
                  "Reg S Temporary Global Note Legend" means the legend set
forth in Section 2.6(g)(3) hereof, which is required to be placed on all Reg S
Temporary Global Notes issued under this Indenture.

                  "Regulation S" means Regulation S promulgated under the
Securities Act, as it may be amended from time to time, and any successor
provision thereto.

                  "Regulation S Global Note" means a Reg S Temporary Global Note
or a Reg S Permanent Global Note, as the case may be.

                  "Related Business" means the business conducted (or proposed
to be conducted) by the Company and its Subsidiaries as of the Issue Date and
any and all businesses that in the good faith judgment of the Board of Directors
of the Company are related businesses.

                  "Restricted Definitive Note" means one or more Definitive
Notes bearing the Private Placement Legend, issued under this Indenture.

                  "Restricted Global Note" means one or more Global Notes
bearing the Private Placement Legend, issued under this Indenture; provided,
that in no case shall an Exchange Note issued in accordance with this Indenture
and the terms of the Note Registration Rights Agreement be a Restricted Global
Note.

                  "Restricted Investment" means, in one or a series of related
transactions, any Investment other than a Permitted Investment.

                  "Restricted Payment" means, with respect to any Person:

                  (a) the declaration or payment of any dividend or other
distribution in respect of Equity Interests of such Person;

                  (b) any payment (except to the extent with Qualified Capital
Stock) on account of the purchase, redemption or other acquisition or retirement
for value of Equity Interests of such Person;

                  (c) other than with the proceeds from the substantially
concurrent sale of, or in exchange for, Refinancing Indebtedness, any purchase,
redemption, or other acquisition or retirement for value of, any payment in
respect of any amendment of the terms of or any defeasance of, any Subordinated
Indebtedness directly or indirectly, by such Person or a Subsidiary of such
Person prior to the scheduled maturity, any scheduled repayment of principal, or
scheduled sinking fund payment, as the case may be, of such Indebtedness; and

                  (d) any Restricted Investment by such Person;

provided, however, that the term "Restricted Payment" does not include (1) any
dividend, distribution or other payment on or with respect to Equity Interests
of an issuer to the extent payable solely in shares of Qualified Capital Stock
of such issuer, or (2) any dividend, distribution or other payment to the
Company, or to any of the Guarantors, by the Company or any of its Subsidiaries
and any Investment in any Guarantor by the Company or any Subsidiary.

                                       22
<PAGE>
                  "Rule 144" means Rule 144 promulgated under the Securities
Act, as it may be amended from time to time, and any successor provision
thereto.

                  "Rule 144A" means Rule 144A promulgated under the Securities
Act, as it may be amended from time to time, and any successor provision
thereto.

                  "SEC" means the United States Securities and Exchange
Commission, or any successor agency.

                  "Securities Act" means the Securities Act of 1933, as amended,
and the rules and regulations of the SEC thereunder.

                  "Senior Indebtedness" means all of the obligations of the
Company and the Guarantors to pay the principal of, premium, if any, interest
(including all interest, fees, costs and expenses accruing subsequent to the
commencement of any bankruptcy or similar proceeding, whether or not a claim for
post-petition interest, fees, costs or expenses is allowed as a claim in any
proceeding) and amounts payable on or in connection with, and all letters of
credit, reimbursement obligations and fees, costs, expenses and other amounts
and liabilities accrued or due on or in connection with, and Interest Swap and
Hedging Obligations issued by parties (or their affiliates) to and secured with,
of up to $35,000,000 in principal amount of Indebtedness incurred under the
Credit Agreement and any other unsubordinated Existing Indebtedness or
Indebtedness which is incurred pursuant to Section 4.7 and is permitted by the
terms of Section 4.7 to be senior in right of payment to the Notes.

                  "Shelf Registration Statement" shall have the meaning set
forth in the Note Registration Rights Agreement.

                  "Significant Subsidiary" shall have the meaning provided under
Regulation S-X of the Securities Act, as in effect on the Issue Date.

                  "Special Record Date" means, for payment of any Defaulted
Interest, a date fixed by the Paying Agent pursuant to Section 2.12 hereof.

                  "S&P" means Standard & Poor's Ratings Services, a division of
The McGraw- Hill Companies, and its successors.

                  "Stated Maturity," when used with respect to any Note, means
August 15, 2006.

                  "Subordinated Indebtedness" means Indebtedness of the Company
or a Guarantor that is subordinated in right of payment by its terms or the
terms of any document or instrument relating thereto ("contractually") to the
Notes or such Guarantee, as applicable, in any respect.

                  "Subsidiary," with respect to any Person, means (1) a
corporation a majority of whose Voting Equity Interests is at the time, directly
or indirectly, owned by such Person, by such Person and one or more Subsidiaries
of such Person or by one or more Subsidiaries of such Person, and (2) any other
Person (other than a corporation) in which such Person, one or more Subsidiaries
of such Person, or such Person and one or more Subsidiaries of such Person,
directly or indirectly, at the date of determination thereof has a majority
ownership interest, or (3) a partnership in which such Person or a Subsidiary of
such Person is, at the time, a general

                                       23
<PAGE>
partner and in which such Person, directly or indirectly, at the date of
determination thereof has a majority ownership interest. Notwithstanding the
foregoing, an Unrestricted Subsidiary shall not be a Subsidiary of the Company
or of any Subsidiary of the Company for any purpose under this Indenture
(including the definitions therein). Unless the context requires otherwise,
Subsidiary means each direct and indirect Subsidiary of the Company.
Notwithstanding the foregoing, ORBIMAGE shall not be deemed a Subsidiary of the
Company or its Subsidiaries.

                  "TIA" means the Trust Indenture Act of 1939, as amended, and
the rules and regulations (and, if applicable, no-action letters) of the SEC
thereunder.

                  "TMS Indebtedness" means the Indebtedness incurred by the
Company prior to the Issue Date attributable to its Transportation Management
Systems business segment.

                  "Transfer Restricted Notes" means Global Notes and Definitive
Notes that bear or are required to bear the Private Placement Legend, issued
under this Indenture.

                  "Trustee" means the party named as such above until a
successor replaces it in accordance with the applicable provisions of this
Indenture and thereafter means such successor serving hereunder.

                  "Unit" means a unit consisting of one Note in aggregate
principal amount of $1,000 and one Warrant.

                  "Unrestricted Definitive Note" means one or more Definitive
Notes that do not bear and are not required to bear the Private Placement
Legend, issued under this Indenture.

                  "Unrestricted Global Note" means one or more permanent Global
Notes representing a series of Notes that does not bear and is not required to
bear the Private Placement Legend, issued under this Indenture.

                  "Unrestricted Subsidiary" means (1) any subsidiary of the
Company that does not own any Capital Stock of, or own or hold any Lien on any
property of, the Company or any other Subsidiary of the Company and that, at the
time of determination, shall be an Unrestricted Subsidiary (as designated by the
Board of Directors of the Company); provided, that such Subsidiary at the time
of such designation (a) is not party to any agreement, contract, arrangement or
understanding with the Company or any Subsidiary of the Company unless the terms
of any such agreement, contract, arrangement or understanding are no less
favorable to the Company or such Subsidiary than those that might be obtained at
the time from Persons who are not Affiliates of the Company; (b) is a Person
with respect to which neither the Company nor any of its Subsidiaries has any
direct or indirect obligation (x) to subscribe for additional Equity Interests
or (y) to maintain or preserve such Person's financial condition or to cause
such Person to achieve any specified levels of operating results; and (c) has
not guaranteed or otherwise directly or indirectly provided credit support for
any Indebtedness of the Company or any of its Subsidiaries, and (2) any
subsidiary of any Unrestricted Subsidiary. The Board of Directors of the Company
may designate any Unrestricted Subsidiary to be a Subsidiary, provided, that (1)
no Default or Event of Default is existing or will occur as a consequence
thereof and (2) immediately after giving effect to such designation, on a pro
forma basis, the Company could incur at least $1.00 of Indebtedness pursuant to
the Debt Incurrence Ratio of Section 4.7 herein. Each such designation shall be
evidenced by filing with the Trustee a

                                       24
<PAGE>
certified copy of the resolution giving effect to such designation and an
Officers' Certificate certifying that such designation complied with the
foregoing conditions.

                  "U.S. Government Obligations" means direct non-callable
obligations of, or noncallable obligations guaranteed by, the United States of
America for the payment of which obligation or guarantee the full faith and
credit of the United States of America is pledged.

                  "U.S. Person" means a U.S. person as defined in Rule 902(k)
under the Securities Act.

                  "Voting Equity Interests" means Equity Interests which at the
time are entitled to vote in the election of directors or members of the
comparable governing body generally.

                  "Warrant Agreement" means the Warrant Agreement dated as of
the date hereof among the Company and U.S. Bank, N.A., as warrant agent, as such
agreement may be amended, modified and supplemented from time to time in
accordance with the terms thereof.

                  "Warrants" has the meaning given to such term in the Warrant
Agreement.

                  "Warrant Shares" has the meaning given to such term in the
Warrant Agreement.

                  "Wholly Owned Subsidiary" means a Subsidiary all the Equity
Interests of which (other than directors' qualifying shares) are owned by the
Company or one or more Wholly Owned Subsidiaries of the Company or a combination
thereof.

SECTION 1.2       OTHER DEFINITIONS

<TABLE>
<CAPTION>
               Term                                                 Defined in Section
               ----                                                 ------------------
<S>                                                                 <C>
               "Affiliate Transaction"                              4.12
               "Asset Sale"                                         4.13
               "Asset Sale Amount"                                  4.13
               "Asset Sale Offer"                                   4.13
               "Asset Sale Offer Amount"                            4.13
               "Asset Sale Offer Period"                            4.13
               "Authentication Order"                               2.2
               "Benefitted Party"                                   10.8
               "Change of Control Offer"                            4.16
               "Change of Control Offer Period"                     4.16
               "Change of Control Purchase Date"                    4.16
               "Change of Control Purchase Price"                   4.16
               "Covenant Defeasance"                                8.3
               "Debt Incurrence Ratio"                              4.7
               "Defaulted Interest"                                 2.12
               "DTC"                                                2.3
               "Excess Proceeds"                                    4.13
</TABLE>

                                       25
<PAGE>
<TABLE>
<S>                                                                 <C>
               "Guarantee Obligations"                              10.8
               "incur" or "incurrence"                              4.7
               "Incurrence Date"                                    4.7
               "Legal Defeasance"                                   8.2
               "Paying Agent"                                       2.3
               "Registrar"                                          2.3
               "Redemption Date"                                    3.7
</TABLE>

SECTION 1.3       INCORPORATION BY REFERENCE OF TRUST INDENTURE ACT

                  Whenever this Indenture refers to a provision of the TIA, such
provision is incorporated by reference in and made a part of this Indenture.

                  The following TIA terms used in this Indenture have the
following meanings:

                  "Commission" means the Securities and Exchange Commission;

                  "obligor" on the Notes means the Company, each Guarantor and
any successor obligor upon the Notes.

                  All other terms used in this Indenture that are defined by the
TIA, defined by TIA reference to another statute or defined by SEC rule under
the TIA have the meanings so assigned to them.

SECTION 1.4       RULES OF CONSTRUCTION

                  Unless the context otherwise requires:

                  (1) a term has the meaning assigned to it;

                  (2) an accounting term not otherwise defined has the meaning
assigned to it in accordance with GAAP;

                  (3) "or" is not exclusive;

                  (4) words in the singular include the plural, and in the
plural include the singular;

                  (5) provisions apply to successive events and transactions;

                  (6) "herein," "hereof" and other words of similar import refer
to this Indenture as a whole and not to any particular Article, Section or other
subdivision;

                  (7) references to sections of or rules under the Securities
Act and the Exchange Act shall be deemed to include substitute, replacement of
successor sections or rules adopted by the SEC from time to time; and

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<PAGE>
                  (8) reference to "subject to the terms of the Intercreditor
Agreement" shall mean if the Intercreditor Agreement is then in effect.

                                   ARTICLE II
                                    THE NOTES

SECTION 2.1       FORM AND DATING

                  (a) General. The Notes and the Trustee's certificate of
authentication shall be substantially in the form of Exhibit A hereto and shall
be issued initially, together with the Warrants, as Units, substantially in the
form of Exhibit B hereto. The Notes and the Warrants shall be separately
transferable at the option of the Holder immediately following the Issue Date.
The Notes and Warrants will be mandatorily separated upon the earlier to occur
of (i) the date on with the registration statement for the Exchange Offer is
declared effective under the Securities Act and (ii) the date on which a shelf
registration statement with respect to the Notes or for the Warrants or the
Warrant Shares is declared effective under the Securities Act.

                  The Notes may have notations, legends or endorsements required
by law, stock exchange rule or usage. Each Note shall be dated the date of its
authentication. The Notes shall be in denominations of $1,000 and integral
multiples thereof.

                  The terms and provisions contained in the Notes shall
constitute, and are hereby expressly made, a part of this Indenture and the
Company, the Guarantors and the Trustee, by their execution and delivery of this
Indenture, expressly agree to such terms and provisions and to be bound thereby.
However, to the extent any provision of any Note conflicts with the express
provisions of this Indenture, the provisions of this Indenture shall govern and
be controlling.

                  (b) Global Notes. Global Notes shall be substantially in the
form of Exhibit A attached hereto (including the Global Note Legend thereon and
the "Schedule of Exchanges of Interests in the Global Note" attached thereto).
Definitive Notes shall be substantially in the form of Exhibit A attached hereto
(but without the Global Note Legend thereon and without the "Schedule of
Exchanges of Interests in the Global Note" attached thereto). Each Global Note
shall represent such of the outstanding Notes as shall be specified therein and
each shall provide that it shall represent the aggregate principal amount of
outstanding Notes from time to time endorsed thereon and that the aggregate
principal amount of outstanding Notes represented thereby may from time to time
be reduced or increased, as appropriate, to reflect exchanges and redemptions.
Any endorsement of a Global Note to reflect the amount of any increase or
decrease in the aggregate principal amount of outstanding Notes represented
thereby shall be made by the Trustee or the Notes Custodian, at the direction of
the Trustee, in accordance with instructions given by the Holder thereof as
required by Section 2.6 hereof.

                  (c) Temporary Global Notes. Notes offered and sold in reliance
on Regulation S shall be issued initially in the form of the Reg S Temporary
Global Note, which shall be deposited on behalf of the Holders with the Trustee,
at its Corporate Trust office, as custodian for the Depositary, and registered
in the name of the Depositary or the nominee of the Depositary for the accounts
of designated agents holding of behalf of Euroclear or Clearstream, duly
executed by the Company and authenticated by the Trustee as hereinafter
provided. The

                                       27
<PAGE>
Distribution Compliance Period shall be terminated upon the receipt by the
Trustee of (i) a written certificate from the Depositary, together with copies
of certificates from Euroclear and Clearstream certifying that they have
received certification of non-United States beneficial ownership of 100% of the
aggregate principal amount of the Reg S Temporary Global Note (except to the
extent of any beneficial owners thereof who acquired an interest therein during
the Distribution Compliance Period pursuant to another exemption from
registration under the Securities Act and who will take delivery of a beneficial
ownership interest in a 144A Global Note bearing the Private Placement Legend as
contemplated by Section 2.6 hereof), and (ii) and Officers' Certificate from the
Company. Following the termination of the Distribution Compliance Period,
beneficial interests in the Reg S Temporary Global Note shall be exchanged for
beneficial interests in the Reg S Permanent Global Notes pursuant to the
Applicable Procedures. Simultaneously with the authentication of the Reg S
Permanent Global Note, the Trustee shall cancel the Reg S Temporary Global Note.
The aggregate principal amount of the Reg S Temporary Global Note and the Reg S
Permanent Global Note may from time to time be increased or decreased by
adjustments made on the records of the Trustee and the Depositary or its
nominee, as the case may be, in connection with transfers of interest as
hereinafter provided.

                  (d) Euroclear and Clearstream Procedures Applicable. The
provisions of the "Operating Procedures of the Euroclear System" and "Terms and
Conditions Governing Use of Euroclear" and the "General Terms and Conditions of
Clearstream Banking Luxem bourg" and "Customer Handbook" of Clearstream Banking
Luxembourg in effect at the relevant time shall be applicable to transfers of
beneficial interests in the Regulation S Global Notes that are held by
Participants through Euroclear or Clearstream Banking Luxembourg.

SECTION 2.2       EXECUTION AND AUTHENTICATION

                  Two Officers shall sign the Notes for the Company by manual or
facsimile signature. In the case of Definitive Notes, such signatures may be
imprinted or otherwise reproduced on such Notes. If an Officer whose signature
is on a Note no longer holds that office at the time a Note is authenticated,
the Note shall nevertheless be valid. A Note shall not be valid until
authenticated by the manual signature of the Trustee. The signature shall be
conclusive evidence that the Note has been authenticated under this Indenture.
The Trustee shall, upon a written order of the Company signed by an Officer (an
"Authentication Order"), authenticate Notes for issuance up to the aggregate
principal amount stated in such Authentica tion Order; provided that Notes
authenticated for issuance on the Issue Date shall not exceed $135,000,000 in
aggregate principal amount. The Trustee may appoint an authenticating agent
acceptable to the Company to authenticate Notes. An authenticating agent may
authenticate Notes whenever the Trustee may do so. Each reference in this
Indenture to authentication by the Trustee includes authentication by such
agent. An authenticating agent has the same rights as an Agent to deal with
Holders or an Affiliate of the Company.

SECTION 2.3       REGISTRAR, PAYING AGENT AND DEPOSITARY

                  The Company shall maintain an office or agency in the Borough
of Manhattan, The City of New York, where Notes may be presented for
registration of transfer or for exchange ("Registrar") and an office or agency
where Notes may be presented for payment ("Paying Agent"). The Registrar shall
keep a register of the Notes and of their transfer and exchange. The Company may
appoint one or more co-registrars and one or more additional

                                       28
<PAGE>
paying agents. The term "Registrar" includes any co-registrar and the term
"Paying Agent" includes any additional paying agent. The Company may change any
Paying Agent or Registrar without notice to any Holder. The Company shall notify
the Trustee in writing of the name and address of any Agent not a party to this
Indenture. If the Company fails to appoint or maintain another entity as
Registrar or Paying Agent, the Trustee shall act as such. The Company or any of
its Subsidiaries may act as Paying Agent or Registrar. The Company initially
appoints The Depository Trust Company ("DTC") to act as Depositary with respect
to the Global Notes. The Company initially appoints the Trustee to act as the
Registrar and Paying Agent and to act as Notes Custodian with respect to the
Global Notes.

SECTION 2.4       PAYING AGENT TO HOLD MONEY IN TRUST

                  The Company shall require each Paying Agent other than the
Trustee to agree in writing that the Paying Agent will hold in trust for the
benefit of Holders or the Trustee all money held by the Paying Agent for the
payment of principal, premium or Liquidated Damages, if any, or interest on the
Notes, and will notify the Trustee of any default by the Company in making any
such payment. While any such default continues, the Trustee may require a Paying
Agent to pay all money held by it to the Trustee. The Company at any time may
require a Paying Agent to pay all money held by it to the Trustee. Upon payment
over to the Trustee, the Paying Agent (if other than the Company or a
Subsidiary) shall have no further liability for the money. If the Company or a
Subsidiary acts as Paying Agent, it shall segregate and hold in a separate trust
fund for the benefit of the Holders all money held by it as Paying Agent. Upon
any bankruptcy or reorganization proceedings relating to the Company, the
Trustee shall serve as Paying Agent for the Notes.

SECTION 2.5       HOLDER LISTS

                  The Trustee shall preserve in as current a form as is
reasonably practicable the most recent list available to it of the names and
addresses of all Holders and shall otherwise comply with TIA Section 312(a). If
the Trustee is not the Registrar, the Company shall furnish, or shall cause the
Registrar (if other than the Company) to furnish, to the Trustee at least seven
Business Days before each Interest Payment Date and at such other times as the
Trustee may request in writing, a list in such form and as of such date as the
Trustee may reasonably require of the names and addresses of the Holders of
Notes and the Company shall otherwise comply with TIA Section 312(a).

SECTION 2.6       TRANSFER AND EXCHANGE

                  (a) Transfer and Exchange of Global Notes. A Global Note may
not be transferred except as a whole by the Depositary to a nominee of the
Depositary, by a nominee of the Depositary to the Depositary or to another
nominee of the Depositary, or by the Depositary or any such nominee to a
successor Depositary or a nominee of such successor Depositary. Global Notes
will not be exchanged by the Company for Definitive Notes unless:

                  (i) the Company delivers to the Trustee notice from the
                  Depositary that (x) it is unwilling or unable to continue to
                  act as Depositary and a successor Depositary is not appointed
                  by the Company within 90 days after the date of such notice
                  from the Depositary or (y) it is no longer a clearing agency
                  registered under the Exchange Act;

                                       29
<PAGE>
                  (ii) the Company in its sole discretion determines that the
                  Global Notes (in whole but not in part) should be exchanged
                  for Definitive Notes and delivers a written notice to such
                  effect to the Trustee (provided, that in no event shall the
                  Regulation S Temporary Global Note be exchanged by the Company
                  for Definitive Notes prior to (x) the expiration of the
                  Restricted Period and (y) the receipt by the Registrar of any
                  certificates required pursuant to Rule 903(b)(3)(ii)(B) under
                  the Securities Act and provided further, there shall be no
                  continuing Default or Event of Default); or

                  (iii) an Event of Default shall have occurred and be
                  continuing with respect to the Notes and the Trustee has
                  received a request from the Depositary or any Holder to issue
                  Definitive Notes;

provided, that in no event shall the Reg S Temporary Global Note be exchanged by
the Company for Definitive Notes prior to (x) the expiration of the Distribution
Compliance Period and (y) the receipt by the Registrar of any certificate
identified by the Company and its counsel to be required pursuant to Rule 903 or
Rule 904 under the Securities Act. Upon the occurrence of any of the preceding
events in (i), (ii) or (iii) above, Definitive Notes shall be issued in such
names as the Depositary shall instruct the Trustee.

                  In addition, beneficial interests in a Global Note may be
exchanged for a Definitive Note upon request but only upon 20 days' prior
written notice by or on behalf of the Depositary in accordance with its
customary procedures. Upon the occurrence of any of the events described in this
Section 2.6(a), Definitive Notes shall be issued in such names as the Depositary
shall instruct the Trustee. Global Notes also may be exchanged or replaced, in
whole or in part, as provided in Sections 2.7 and 2.10 hereof. Every Note, other
than a Definitive Note, authenticated and delivered in exchange for, or in lieu
of, a Global Note or any portion thereof, pursuant to this Section 2.6 or
Section 2.7 or 2.10 hereof, shall be authenticated and delivered in the form of,
and shall be, a Global Note. A Global Note may be exchanged for another Note
only upon compliance with the applicable provisions of this Section 2.6(a) and
Sections 2.7 and 2.10 hereof. Beneficial interests in a Global Note may be
transferred and exchanged only upon compliance with the applicable provisions of
Sections 2.6(b), (c), or (f) hereof.

                  (b) Transfer and Exchange of Beneficial Interests in the
Global Notes. The transfer and exchange of beneficial interests in the Global
Notes shall be effected through the Depositary, in accordance with the
provisions of this Indenture and the Applicable Procedures. Beneficial interests
in the Restricted Global Notes shall be subject to restrictions on transfer
comparable to those set forth herein to the extent required by the Securities
Act. Transfers of beneficial interests in the Global Notes also shall require
compliance with either subparagraph (1) or (2) below, as applicable, as well as
one or more of the other following subparagraphs, as applicable:

                  (1) Transfer of Beneficial Interests in the Same Global Note.
Beneficial interests in any Restricted Global Note may be transferred to Persons
who take delivery thereof in the form of a beneficial interest in the same
Restricted Global Note in accordance with the transfer restrictions set forth in
the Private Placement Legend; provided, however, that prior to the expiration of
the Distribution Compliance Period, transfers of beneficial interests in the Reg
S Temporary Global Note may not be made to a U.S. person (as such term is
defined in Regulation S) or for the account or benefit of a U.S. person (other
than an Initial Purchaser).

                                       30
<PAGE>
Beneficial interests in any Unrestricted Global Note may be transferred to
Persons who take delivery thereof in the form of a beneficial interest in an
Unrestricted Global Note. No written orders or instructions shall be required to
be delivered to the Registrar to effect the transfers described in this Section
2.6(b)(1), but the Company or the Trustee may request an opinion of counsel.

                  (2) All Other Transfers and Exchanges of Beneficial Interests
in Global Notes (including for Definitive Notes). In connection with all
transfers and exchanges of beneficial interests that are not subject to Section
2.6(b)(1) above, the transferor of such beneficial interest must deliver to the
Registrar either (A) (1) an order from a Participant or an Indirect Participant
given to the Depositary in accordance with the Applicable Procedures directing
the Depositary to credit or cause to be credited a beneficial interest in
another Global Note in an amount equal to the beneficial interest to be
transferred or exchanged and (2) instructions given in accordance with the
Applicable Procedures containing information regarding the Participant account
to be credited with such increase or (B) (1) an order from a Participant or an
Indirect Participant given to the Depositary in accordance with the Applicable
Procedures directing the Depositary to cause to be issued a Definitive Note in
an amount equal to the beneficial interest to be transferred or exchanged and
(2) instructions given by the Depositary to the Registrar containing information
regarding the Person in whose name such Definitive Note shall be registered to
effect the transfer or exchange referred to in (B)(1) above; provided, that in
no event shall Definitive Notes be issued upon the transfer or exchange of
beneficial interests in the Reg S Temporary Global Note prior to (x) the
expiration of the Distribution Compliance Period and (y) the receipt by the
Registrar of any certificates identified by the Company or its counsel to be
required pursuant to Rule 903 and Rule 904 under the Securities Act. Upon
consummation of an Exchange Offer by the Company in accordance with Section
2.6(f) hereof, the requirements of this Section 2.6(b)(2) shall be deemed to
have been satisfied upon receipt by the Registrar of the instructions contained
in the Letter of Transmittal delivered by the Holder of such beneficial
interests in the Restricted Global Notes. Upon satisfaction of all of the
requirements for transfer or exchange of beneficial interests in Global Notes
contained in this Indenture and the Notes or otherwise applicable under the
Securities Act, the Trustee shall adjust the principal amount of the relevant
Global Note(s) pursuant to Section 2.6(h) hereof.

                  (3) Transfer of Beneficial Interests to Another Restricted
Global Note. A beneficial interest in any Restricted Global Note may be
transferred to a Person who takes delivery thereof in the form of a beneficial
interest in another Restricted Global Note if the transfer complies with the
requirements of Section 2.6(b)(2) above and the Registrar receives the
following:

                    (A) if the transferee will take delivery in the form of a
beneficial interest in the 144A Global Note, then the transferor must deliver a
certificate in the form of Exhibit C hereto, including the certifications in
item (1) thereof;

                    (B) if the transferee will take delivery in the form of a
beneficial interest in the 501 Global Note, then the transferor must deliver a
certificate in the form of Exhibit C hereto, including the certifications in
item (3)(d) thereof; or

                    (C) if the transferee will take delivery in the form of a
beneficial interest in the Reg S Temporary Global Note or the Reg S Permanent
Global Note,

                                       31
<PAGE>
then the transferor must deliver a certificate in the form of Exhibit C hereto,
including the certifications in item (2) thereof.

                  (4) Transfer and Exchange of Beneficial Interests in a
Restricted Global Note for Beneficial Interests in an Unrestricted Global Note.
A beneficial interest in any Restricted Global Note may be exchanged by any
holder thereof for a beneficial interest in an Unrestricted Global Note or
transferred to a Person who takes delivery thereof in the form of a beneficial
interest in an Unrestricted Global Note if the exchange or transfer complies
with the requirements of Section 2.6(b)(2) above and:

                    (A) such exchange or transfer is effected pursuant to the
Exchange Offer in accordance with the Note Registration Rights Agreement and
Section 2.6(f) hereof, and the holder of the beneficial interest to be
transferred, in the case of an exchange, or the transferee, in the case of a
transfer, certifies in the applicable Letter of Transmittal that it is not (1) a
Broker-Dealer, (2) a Person participating in the distribution of the Exchange
Notes or (3) a Person who is an affiliate (as defined in Rule 144) of the
Company;

                    (B) such transfer is effected pursuant to the Shelf
Registration Statement in accordance with the Note Registration Rights Agreement
and a certificate to the effect set forth in Exhibit C hereto, including the
certifications in item (3)(c) thereof, is delivered by the transferor;

                    (C) such transfer is effected by a Broker-Dealer pursuant to
the Exchange Offer Registration Statement in accordance with the Note
Registration Rights Agreement and a certificate to the effect set forth in
Exhibit C hereto, including the certifications in item (3)(c) thereof, is
delivered by the transferor; or

                    (D) the Registrar receives the following: (1) if the holder
of such beneficial interest in a Restricted Global Note proposes to exchange
such beneficial interest for a beneficial interest in an Unrestricted Global
Note, a certificate from such holder in the form of Exhibit D hereto, including
the certifications in item (1)(a) thereof; or (2) if the holder of such
beneficial interest in a Restricted Global Note proposes to transfer such
beneficial interest to a Person who shall take delivery thereof in the form of a
beneficial interest in an Unrestricted Global Note, a certificate from such
holder in the form of Exhibit C hereto, including the certifications in item (4)
thereof; and, in each such case set forth in this subparagraph (D), an Opinion
of Counsel in form, and from legal counsel, reasonably acceptable to the
Registrar and the Company to the effect that such exchange or transfer is in
compliance with the Securities Act and that the restrictions on transfer
contained herein and in the Private Placement Legend are no longer required in
order to maintain compliance with the Securities Act.

                  If any such transfer is effected pursuant to subparagraph (B)
or (D) above at a time when an Unrestricted Global Note has not yet been issued,
the Company shall issue and, upon receipt of an Authentication Order in
accordance with Section 2.2 hereof, the Trustee shall authenticate one or more
Unrestricted Global Notes in an aggregate principal amount equal to the
aggregate principal amount of beneficial interests transferred pursuant to
subparagraph (B) or (D) above. Beneficial interests in an Unrestricted Global
Note cannot be exchanged for, or transferred to Persons who take delivery
thereof in the form of, a beneficial interest in a Restricted Global Note.

                                       32
<PAGE>
                  (c) Transfer and Exchange of Beneficial Interests for
Definitive Notes. Transfer and exchange of beneficial interests in the Global
Notes for Definitive Notes shall be made subject to compliance with this Section
2.6(c), and the requesting Holder shall provide any certifications, documents
and information, as applicable, required pursuant to the following provisions of
this Section 2.6(c). Any Definitive Note issued in exchange for a beneficial
interest in a Global Note pursuant to this Section 2.6(c) shall be registered in
such name or names and in such authorized denomination or denominations as the
Holder of such beneficial interest shall instruct the Registrar through
instructions from the Depositary and the Participant or Indirect Participant.
The Trustee shall deliver such Definitive Notes to the Persons in whose names
such Definitive Notes are so registered.

                  (1) Beneficial Interests in Restricted Global Notes to
Restricted Definitive Notes. If any holder of a beneficial interest in a
Restricted Global Note proposes to exchange such beneficial interest for a
Restricted Definitive Note or to transfer such beneficial interest to a Person
who takes delivery thereof in the form of a Restricted Definitive Note, then,
upon receipt by the Registrar of the following documentation:

                    (A) if the holder of such beneficial interest in a
Restricted Global Note proposes to exchange such beneficial interest for a
Restricted Definitive Note, a certificate from such holder in the form of
Exhibit D hereto, including the certifications in item (2)(a) thereof;

                    (B) if such beneficial interest is being transferred to a
QIB in accordance with Rule 144A under the Securities Act, a certificate to the
effect set forth in Exhibit C hereto, including the certifications in item (1)
thereof;

                    (C) if such beneficial interest is being transferred to a
Non-U.S. Person (as such term is defined in Regulation S) in an offshore
transaction in accordance with Rule 903 or Rule 904 under the Securities Act, a
certificate to the effect set forth in Exhibit C hereto, including the
certifications in item (2) thereof;

                    (D) if such beneficial interest is being transferred to an
Institutional Accredited Investor in reliance on an exemption from the
registration requirements of the Securities Act other than those listed in
subparagraphs (B) and (C) above, a certificate to the effect set forth in
Exhibit C hereto, including the certifications, certificates and Opinion of
Counsel required by item (3)(d) thereof, if applicable; or

                    (E) if such beneficial interest is being transferred to the
Company or any of its Subsidiaries, a certificate to the effect set forth in
Exhibit C hereto, including the certifications in item (3)(b) thereof,

the Trustee shall cause the aggregate principal amount of the Restricted Global
Note to be reduced accordingly pursuant to Section 2.6(h) hereof, and the
Company shall execute and, upon receipt of an Authentication Order pursuant to
Section 2.2, the Trustee shall authenticate and deliver to the Person designated
in the instructions a Restricted Definitive Note, in the appropriate principal
amount.

                                       33
<PAGE>
Any Restricted Definitive Note issued in exchange for a beneficial interest in a
Restricted Global Note pursuant to this Section 2.6(c)(1) shall bear the Private
Placement Legend and shall be subject to all restrictions on transfer contained
therein.

                  (2) Beneficial Interests in Restricted Global Notes to
Unrestricted Definitive Notes. A holder of a beneficial interest in a Restricted
Global Note may exchange such beneficial interest for an Unrestricted Definitive
Note or may transfer such beneficial interest to a Person who takes delivery
thereof in the form of an Unrestricted Definitive Note only if:

                    (A) such exchange or transfer is effected pursuant to the
Exchange Offer in accordance with the Note Registration Rights Agreement and
Section 2.6(f) hereof, and the holder of such beneficial interest, in the case
of an exchange, or the transferee, in the case of a transfer, certifies in the
applicable Letter of Transmittal that it is not (1) a Broker-Dealer, (2) a
Person participating in the distribution of the Exchange Notes or (3) a Person
who is an affiliate (as defined in Rule 144) of the Company;

                    (B) such transfer is effected pursuant to the Shelf
Registration Statement in accordance with the Note Registration Rights Agreement
and a certificate to the effect set forth in Exhibit C hereto, including the
certifications in item (3)(c) thereof, is delivered by the transferor;

                    (C) such transfer is effected by a Broker-Dealer pursuant to
the Exchange Offer Registration Statement in accordance with the Note
Registration Rights Agreement and a certificate to the effect set forth in
Exhibit C hereto, including the certifications in item (3)(c) thereof, is
delivered by the transferor; or

                    (D) the Registrar receives the following: (1) if the holder
of such beneficial interest in a Restricted Global Note proposes to exchange
such beneficial interest for an Unrestricted Definitive Note, a certificate from
such holder in the form of Exhibit D hereto, including the certifications in
item (1)(b) thereof; or (2) if the holder of such beneficial interest in a
Restricted Global Note proposes to transfer such beneficial interest to a Person
who shall take delivery thereof in the form of an Unrestricted Definitive Note,
a certificate from such holder in the form of Exhibit C hereto, including the
certifications in item (4) thereof; and, in each such case set forth in this
subparagraph (D), an Opinion of Counsel in form, and from legal counsel,
reasonably acceptable to the Registrar and the Company to the effect that such
exchange or transfer is in compliance with the Securities Act and that the
restrictions on transfer contained herein and in the Private Placement Legend
are no longer required in order to maintain compliance with the Securities Act.

Upon receipt of such applicable documentation, the Trustee shall cause the
aggregate principal amount of the Restricted Global Note to be reduced
accordingly pursuant to Section 2.6(h) hereof, and the Company shall execute
and, upon receipt of an Authentication Order pursuant to Section 2.2, the
Trustee shall authenticate and deliver to the Person designated in the
instructions an Unrestricted Definitive Note, in the appropriate principal
amount.

                  Beneficial interests in an Unrestricted Global Note cannot be
exchanged for, or transferred to Persons who take delivery thereof in the form
of, a Restricted Definitive Note.

                                       34
<PAGE>
                  (3) Beneficial Interests in Unrestricted Global Notes to
Unrestricted Definitive Notes. If any holder of a beneficial interest in an
Unrestricted Global Note proposes to exchange such beneficial interest for an
Unrestricted Definitive Note or to transfer such beneficial interest to a Person
who takes delivery thereof in the form of an Unrestricted Definitive Note, then
such holder shall satisfy the applicable conditions set forth in Section
2.6(b)(2) hereof. Upon receipt of such applicable documentation, the Trustee
shall cause the aggregate principal amount of the Unrestricted Global Note to be
reduced accordingly pursuant to Section 2.6(h) hereof, and the Company shall
execute and, upon receipt of an Authentication Order pursuant to Section 2.2,
the Trustee shall authenticate and deliver to the Person designated in the
instructions an Unrestricted Definitive Note, in the appropriate principal
amount. Any Unrestricted Definitive Note issued in exchange for a beneficial
interest pursuant to this Section 2.6(c)(3) shall not bear the Private Placement
Legend.

                  (4) Transfer or Exchange of Reg S Temporary Global Notes.
Notwith standing the other provisions of this Section 2.6, a beneficial interest
in the Reg S Temporary Global Note may not be (A) exchanged for a Definitive
Note prior to (x) the expiration of the Distribution Compliance Period (unless
such exchange is approved by the Company, does not require an investment
decision on the part of the Holder thereof and does not violate the provisions
of Regulation S) and (y) the receipt by the Registrar of any certificates
identified by the Company or its counsel to be required pursuant to Rule
903(b)(3)(ii)(B) under the Securities Act or (B) transferred to a Person who
takes delivery thereof in the form of a Definitive Note prior to the events set
forth in clause (A) above or unless the transfer is pursuant to an exemption
from the registration requirements of the Securities Act other than Rule 903 or
Rule 904.

                  (d) Transfer and Exchange of Definitive Notes for Beneficial
Interests. Transfer and exchange of Definitive Notes for beneficial interests in
the Global Notes shall be made subject to compliance with this Section 2.6(d),
and the requesting Holder shall provide any certifications, documents and
information, as applicable, required pursuant to the following provisions of
this Section 2.6(d). Upon receipt from such Holder of such applicable
documentation and the surrender to the Registrar of the Definitive Notes duly
endorsed or accompanied by a written instruction of transfer in form
satisfactory to the Registrar, duly executed by such Holder or by its attorney,
duly authorized in writing, the Registrar shall register the transfer or
exchange of the Definitive Notes. The Trustee shall cancel such Definitive Notes
so surrendered and cause the aggregate principal amount of the applicable
Restricted Global Note or Unrestricted Global Note, as applicable, to be
increased accordingly pursuant to Section 2.6(h) hereof.

                  (1) Restricted Definitive Notes to Beneficial Interests in
Restricted Global Notes. If any Holder of a Restricted Definitive Note proposes
to exchange such Note for a beneficial interest in a Restricted Global Note or
to transfer such Restricted Definitive Notes to a Person who takes delivery
thereof in the form of a beneficial interest in a Restricted Global Note, then,
upon receipt by the Registrar of the following documentation:

                    (A) if the Holder of such Restricted Definitive Note
proposes to exchange such Note for a beneficial interest in a Restricted Global
Note, a certificate from such Holder in the form of Exhibit D hereto, including
the certifications in item (2)(b) thereof;

                                       35
<PAGE>
                    (B) if such Restricted Definitive Note is being transferred
to a QIB in accordance with Rule 144A under the Securities Act, a certificate to
the effect set forth in Exhibit C hereto, including the certifications in item
(1) thereof;

                    (C) if such Restricted Definitive Note is being transferred
to a Non-U.S. Person in an offshore transaction in accordance with Rule 903 or
Rule 904 under the Securities Act, a certificate to the effect set forth in
Exhibit C hereto, including the certifications in item (2) thereof; or

                    (D) if such Restricted Definitive Note is being transferred
to an Institutional Accredited Investor in accordance with Regulation D under
the Securities Act, a certificate to the effect set forth in Exhibit C hereto,
including the certifications in item (3)(d) thereof;

                  the Trustee shall cancel the Restricted Definitive Note and
increase or cause to be increased the aggregate principal amount of, in the case
of clause (A) above, the appropriate Restricted Global Note, in the case of
clause (B) above, the 144A Global Note, in the case of clause (C) above, the
Regulation S Global Note and in the case of clause (D) above, the 501 Global
Note.

                  (2) Restricted Definitive Notes to Beneficial Interests in
Unrestricted Global Notes. A Holder of a Restricted Definitive Note may exchange
such Note for a beneficial interest in an Unrestricted Global Note or transfer
such Restricted Definitive Note to a Person who takes delivery thereof in the
form of a beneficial interest in an Unrestricted Global Note only if:

                    (A) such exchange or transfer is effected pursuant to the
Exchange Offer in accordance with the Note Registration Rights Agreement and
Section 2.6(f) hereof, and the Holder, in the case of an exchange, or the
transferee, in the case of a transfer, certifies in the applicable Letter of
Transmittal that it is not (1) a Broker-Dealer, (2) a Person participating in
the distribution of the Exchange Notes or (3) a Person who is an affiliate (as
defined in Rule 144) of the Company;

                    (B) such transfer is effected pursuant to the Shelf
Registration Statement in accordance with the Note Registration Rights Agreement
and a certificate to the effect set forth in Exhibit C hereto, including the
certifications in item (3)(c) thereof, is delivered by the transferor;

                    (C) such transfer is effected by a Broker-Dealer pursuant to
the Exchange Offer Registration Statement in accordance with the Note
Registration Rights Agreement and a certificate to the effect set forth in
Exhibit C hereto, including the certifications in item (3)(c) thereof, is
delivered by the transferor; or

                    (D) the Registrar receives the following: (1) if the Holder
of such Restricted Definitive Notes proposes to exchange such Notes for a
beneficial interest in the Unrestricted Global Note, a certificate from such
Holder in the form of Exhibit D hereto, including the certifications in item
(1)(c) thereof; or (2) if the Holder of such Restricted Definitive Notes
proposes to transfer such Notes to a Person who shall take delivery thereof in
the form of a beneficial interest in the Unrestricted Global Note, a certificate
from such Holder

                                       36
<PAGE>
in the form of Exhibit C hereto, including the certifications in item (4)
thereof; and, in each such case set forth in this subparagraph (D), an Opinion
of Counsel in form, and from legal counsel, reasonably acceptable to the
Registrar and the Company to the effect that such exchange or transfer is in
compliance with the Securities Act and that the restrictions on transfer
contained herein and in the Private Placement Legend are no longer required in
order to maintain compliance with the Securities Act.

                  (3) Unrestricted Definitive Notes to Beneficial Interests in
Unrestricted Global Notes. A Holder of an Unrestricted Definitive Note may
exchange such Note for a beneficial interest in an Unrestricted Global Note or
transfer such Definitive Notes to a Person who takes delivery thereof in the
form of a beneficial interest in an Unrestricted Global Note at any time.

                  If any such exchange or transfer from a Definitive Note to a
beneficial interest is effected pursuant to subparagraphs (2)(B), (2)(D) or (3)
of this Section 2.6(d) at a time when an Unrestricted Global Note has not yet
been issued, the Company shall issue and, upon receipt of an Authentication
Order in accordance with Section 2.2 hereof, the Trustee shall authenticate one
or more Unrestricted Global Notes in an aggregate principal amount equal to the
principal amount of Definitive Notes so transferred.

                  (e) Transfer and Exchange of Definitive Notes for Definitive
Notes. Upon request by a Holder of Definitive Notes and such Holder's compliance
with the provisions of this Section 2.6(e), the Registrar shall register the
transfer or exchange of Definitive Notes. Prior to such registration of transfer
or exchange, the requesting Holder shall present or surrender to the Registrar
the Definitive Notes duly endorsed or accompanied by a written instruction of
transfer in form satisfactory to the Registrar duly executed by such Holder or
by its attorney, duly authorized in writing. The Trustee shall cancel any such
Definitive Notes so surrendered, and the Company shall execute and, upon receipt
of an Authentication Order pursuant to Section 2.2, the Trustee shall
authenticate and deliver to the Person designated in the instructions a
Restricted Definitive Note or an Unrestricted Definitive Note, as applicable, in
the appropriate principal amount. Any Definitive Note issued pursuant to this
Section 2.6(e) shall be registered in such name or names and in such authorized
denomination or denomina tions as the Holder of such beneficial interest shall
instruct the Registrar through instructions from the Depositary and the
Participant or Indirect Participant. The Trustee shall deliver such Definitive
Notes to the Persons in whose names such Definitive Notes are so registered. In
addition, the requesting Holder shall provide any additional certifications,
documents and information, as applicable, required pursuant to the following
provisions of this Section 2.6(e).

                  (1) Restricted Definitive Notes to Restricted Definitive
Notes. Any Restricted Definitive Note may be transferred to and registered in
the name of Persons who take delivery thereof in the form of a Restricted
Definitive Note if the Registrar receives the following:

                    (A) if the transfer will be made to a QIB pursuant to Rule
144A under the Securities Act, then the transferor must deliver a certificate in
the form of Exhibit C hereto, including the certifications in item (1) thereof;

                                       37
<PAGE>
                    (B) if the transfer will be made pursuant to Rule 903 or
Rule 904, then the transferor must deliver a certificate in the form of Exhibit
C hereto, including the certifications in item (2) thereof;

                    (C) if such beneficial interest is being transferred to an
Institutional Accredited Investor in reliance on an exemption from the
registration requirements of the Securities Act other than those listed in
subparagraphs (A) and (B) above, then the transferor must deliver a certificate
to the effect set forth in Exhibit C hereto, including the certifications,
certificates and Opinion of Counsel required by item (3)(d) thereof, if
applicable; or

                    (D) if such beneficial interest is being transferred to the
Company or any of its Subsidiaries, a certificate to the effect set forth in
Exhibit C hereto, including the certifications in item (3)(b) thereof, must be
delivered by the transferor.

                  (2) Restricted Definitive Notes to Unrestricted Definitive
Notes. Any Restricted Definitive Note may be exchanged by the Holder thereof for
an Unrestricted Definitive Note or transferred to a Person or Persons who take
delivery thereof in the form of an Unrestricted Definitive Note if:

                    (A) such exchange or transfer is effected pursuant to the
Exchange Offer in accordance with the Note Registration Rights Agreement and
Section 2.6(f) hereof, and the Holder, in the case of an exchange, or the
transferee, in the case of a transfer, certifies in the applicable Letter of
Transmittal that it is not (1) a Broker-Dealer, (2) a Person participating in
the distribution of the Exchange Notes or (3) a Person who is an affiliate (as
defined in Rule 144) of the Company;

                    (B) any such transfer is effected pursuant to the Shelf
Registration Statement in accordance with the Note Registration Rights Agreement
and a certificate to the effect set forth in Exhibit C hereto, including the
certifications in item (3)(c) thereof, is delivered by the transferor;

                    (C) any such transfer is effected by a Broker-Dealer
pursuant to the Exchange Offer Registration Statement in accordance with the
Note Registration Rights Agreement and a certificate to the effect set forth in
Exhibit C hereto, including the certifications in item (3)(c) thereof, is
delivered by the transferor; or

                    (D) the Registrar receives the following: (1) if the Holder
of such Restricted Definitive Notes proposes to exchange such Notes for an
Unrestricted Definitive Note, a certificate from such Holder in the form of
Exhibit D hereto, including the certifications in item (1)(d) thereof; or (2) if
the Holder of such Restricted Definitive Notes proposes to transfer such Notes
to a Person who shall take delivery thereof in the form of an Unrestricted
Definitive Note, a certificate from such Holder in the form of Exhibit C hereto,
including the certifications in item (4) thereof; and, in each such case set
forth in this subparagraph (D), an Opinion of Counsel in form, and from legal
counsel, reasonably acceptable to the Registrar and the Company to the effect
that such exchange or transfer is in compliance with the Securities Act and that
the restrictions on transfer contained herein and in the Private Placement
Legend are no longer required in order to maintain compliance with the
Securities Act.

                                       38
<PAGE>
                  (3) Unrestricted Definitive Notes to Unrestricted Definitive
Notes. A Holder of Unrestricted Definitive Notes may transfer such Notes to a
Person who takes delivery thereof in the form of an Unrestricted Definitive
Note. Upon receipt of a request to register such a transfer, the Registrar shall
register the Unrestricted Definitive Notes pursuant to the instructions from the
Holder thereof.

                  (f) Exchange Offer. Upon the occurrence of the Exchange Offer
in accordance with the Note Registration Rights Agreement, the Company shall
issue and, upon receipt of an Authentication Order in accordance with Section
2.2 and an Opinion of Counsel for the Company as to certain matters discussed in
this Section 2.6(f), the Trustee shall authenticate (i) one or more Unrestricted
Global Notes in an aggregate principal amount equal to the sum of (A) the
principal amount of the beneficial interests in the Restricted Global Notes
exchanged or transferred for beneficial interests in Unrestricted Global Notes
in connection with the Exchange Offer pursuant to Section 2.6(b)(4) and (B) the
principal amount of Restricted Definitive Notes exchanged or transferred for
beneficial interests in Unrestricted Global Notes in connection with the
Exchange Offer pursuant to Section 2.6(d)(2), in each case tendered for
acceptance by Persons that certify in the applicable Letters of Transmittal that
(x) they are not Broker-Dealers, (y) they are not participating in a
distribution of the Exchange Notes and (z) they are not affiliates (as defined
in Rule 144) of the Company, and accepted for exchange in the Exchange Offer,
and (ii) one or more Unrestricted Definitive Notes in an aggregate principal
amount equal to the sum of (A) the principal amount of the Restricted Definitive
Notes exchanged or transferred for Unrestricted Definitive Notes in connection
with the Exchange Offer pursuant to Section 2.6(e)(2) and (B) the principal
amount of the beneficial interests in the Restricted Global Notes exchanged or
transferred for Unrestricted Definitive Notes in connection with the Exchange
Offer pursuant to Section 2.6(c)(2), in each case tendered for acceptance by
Persons that certify in the applicable Letters of Transmittal that (x) they are
not Broker-Dealers, (y) they are not participating in a distribution of the
Exchange Notes and (z) they are not affiliates (as defined in Rule 144) of the
Company, and accepted for exchange in the Exchange Offer. Concurrently with the
issuance of such Notes, the Trustee shall cancel any Definitive Notes so
surrendered and shall cause the aggregate principal amount of the applicable
Restricted Global Notes to be reduced accordingly, and the Company shall execute
and, upon receipt of an Authentication Order pursuant to Section 2.2, the
Trustee shall authenticate and deliver to the Persons designated by the Holders
of Definitive Notes so accepted Definitive Notes in the appropriate principal
amount.

                  The Opinion of Counsel for the Company referenced above shall
state substantially as follows:

                    (A) the Exchange Notes have been duly authorized and, when
executed by the Company and authenticated by the Trustee in accordance with the
provisions of this Indenture and delivered in exchange for Series A Notes in
accordance with this Indenture and the Exchange Offer, will be entitled to the
benefits of this Indenture, and will constitute valid and binding obligations of
the Company, enforceable against the Company in accordance with their terms,
except as the enforceability thereof may be limited by bankruptcy, insolvency,
reorganization, receivership, moratorium or other laws affecting creditors'
rights (including, without limitation, the effect of statutory and other laws
regarding fraudulent conveyances, fraudulent transfers and preferential
transfers) and as may be limited by the exercise of judicial discretion and the
application of principles of equity including, without limitation, requirements

                                       39
<PAGE>
of good faith, fair dealing, conscionability and materiality (regardless of
whether the enforceability of the Exchange Notes is considered in a proceeding
in equity or at law); and

                    (B) when the Exchange Notes are issued and executed by the
Company and authenticated by the Trustee in accordance with the provisions of
this Indenture and delivered in exchange for Series A Notes in accordance with
this Indenture and the Exchange Offer, the Guarantees by the Guarantors endorsed
thereon will be entitled to the benefits of this Indenture, and will constitute
valid and binding obligations of the Guarantors, enforceable against the
Guarantors in accordance with their terms, except as the enforceability thereof
may be limited by bankruptcy, insolvency, reorganization, receivership,
moratorium or other laws affecting creditors' rights (including, without
limitation, the effect of statutory and other laws regarding fraudulent
conveyances, fraudulent transfers and preferential transfers) and as may be
limited by the exercise of judicial discretion and the application of principles
of equity including, without limitation, requirements of good faith, fair
dealing, conscionability and materiality (regardless of whether the
enforceability of the Guarantees is considered in a proceeding in equity or at
law).

                  (g) Legends. The following legends shall appear on the face of
all Global Notes and Definitive Notes issued under this Indenture unless
specifically stated otherwise in the applicable provisions of this Indenture.

                    (1) Private Placement Legend.

                    (A) Except as permitted by subparagraph (B) below, each
          Global Note and each Definitive Note (and all Notes issued in exchange
          therefor or substitution thereof) shall bear the legend in
          substantially the following form:

"THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS. NEITHER THIS
SECURITY NOR ANY INTEREST OR PARTICIPATION HEREIN MAY BE REOFFERED, SOLD,
ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR OTHERWISE DISPOSED OF IN THE
ABSENCE OF SUCH REGISTRATION OR UNLESS SUCH TRANSACTION IS EXEMPT FROM, OR NOT
SUBJECT TO, REGISTRATION. THE HOLDER OF THIS SECURITY BY ITS ACCEPTANCE HEREOF
AGREES TO OFFER, SELL OR OTHERWISE TRANSFER THIS SECURITY, PRIOR TO THE DATE
WHICH IS TWO YEARS (OR SUCH OTHER PERIOD THAT MAY HEREAFTER BE PROVIDED UNDER
RULE 144(K) UNDER THE SECURITIES ACT AS PERMITTING RESALES OF RESTRICTED
SECURITIES BY NON-AFFILIATES WITHOUT RESTRIC TION) AFTER THE LATER OF THE
ORIGINAL ISSUE DATE HEREOF AND THE LAST DATE ON WHICH THE COMPANY OR ANY
AFFILIATE OF THE COMPANY WAS THE OWNER OF THIS SECURITY (OR ANY PREDECESSOR OF
THIS SECURITY) (THE "RESALE RESTRICTION TERMINATION DATE") ONLY (A) TO THE
COMPANY, (B) PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BEEN DECLARED
EFFECTIVE UNDER THE SECURITIES ACT, (C) FOR SO LONG AS THIS SECURITY IS ELIGIBLE
FOR RESALE PURSUANT TO RULE 144A UNDER THE SECURITIES ACT, IN THE UNITED STATES
TO A PERSON IT REASONABLY BELIEVES IS A "QUALIFIED INSTITUTIONAL BUYER" (AS
DEFINED IN RULE 144A UNDER THE SECURI TIES ACT) THAT PURCHASES FOR ITS OWN
ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS
GIVEN THAT THE

                                       40
<PAGE>
TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A UNDER THE SECURITIES ACT, (D) TO
AN INSTITUTIONAL "ACCREDITED INVESTOR" WITHIN THE MEANING OF SUBPARAGRAPH
(a)(1), (2), (3) OR (7) OF RULE 501 UNDER THE SECURITIES ACT THAT IS ACQUIRING
THIS SECURITY FOR ITS OWN ACCOUNT, OR FOR THE ACCOUNT OF SUCH AN INSTITUTIONAL
"ACCREDITED INVESTOR," FOR INVESTMENT PURPOSES AND NOT WITH A VIEW TO, OR FOR
OFFER OR SALE IN CONNECTION WITH, ANY DISTRIBUTION IN VIOLATION OF THE
SECURITIES ACT, (E) OUTSIDE OF THE UNITED STATES IN AN OFFSHORE TRANSACTION IN
ACCORDANCE WITH RULE 904 UNDER THE SECURITIES ACT OR (F) PURSUANT TO ANOTHER
AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT,
SUBJECT TO THE COMPANY'S AND THE TRUSTEE'S RIGHT PRIOR TO ANY SUCH OFFER, SALE
OR TRANSFER TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL, CERTIFICATIONS
AND/OR OTHER INFORMATION SATISFACTORY TO EACH OF THEM, AND IN EACH OF THE
FOREGOING CASES, A CERTIFICATE OF TRANSFER IN THE FORM APPEARING ON THIS
SECURITY IS COMPLETED AND DELIVERED BY THE TRANSFEROR TO THE TRUSTEE AND IN EACH
CASE IN ACCORDANCE WITH APPLICABLE SECURITIES LAWS OF ANY U.S. STATE OR ANY
OTHER APPLICABLE JURISDICTION. THE HOLDER OF THIS SECURITY AGREES THAT IT WILL
DELIVER TO EACH PERSON TO WHOM THIS SECURITY IS TRANSFERRED A NOTICE
SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. THIS LEGEND WILL BE REMOVED UPON THE
REQUEST OF THE HOLDER AFTER THE RESALE RESTRICTION TERMINATION DATE."

                    (B) Notwithstanding the foregoing, any Global Note or
          Definitive Note issued pursuant to subparagraphs (b)(4), (c)(2),
          (c)(3), (d)(2), (d)(3), (e)(2), (e)(3) or (f) to this Section 2.6 (and
          all Notes issued in exchange therefor or substitution thereof) shall
          not bear the Private Placement Legend.

                  (2) Global Note Legend. To the extent required by the
Depositary, each Global Note shall bear legends in substantially the following
forms:

     "THIS GLOBAL NOTE IS HELD BY THE DEPOSITARY (AS DEFINED IN THE INDENTURE
     GOVERNING THIS NOTE) OR ITS NOMINEE IN CUSTODY FOR THE BENEFIT OF THE
     BENEFICIAL OWNERS HEREOF, AND IS NOT TRANSFERABLE TO ANY PERSON UNDER ANY
     CIRCUMSTANCES EXCEPT THAT (I) THE TRUSTEE MAY MAKE SUCH NOTATIONS HEREON AS
     MAY BE REQUIRED PURSUANT TO SECTION 2.6 OF THE INDENTURE, (II) THIS GLOBAL
     NOTE MAY BE EXCHANGED IN WHOLE BUT NOT IN PART PURSUANT TO SECTION 2.6(a)
     OF THE INDENTURE, (III) THIS GLOBAL NOTE MAY BE DELIVERED TO THE TRUSTEE
     FOR CANCELLATION PURSUANT TO SECTION 2.11 OF THE INDEN TURE AND (IV) THIS
     GLOBAL NOTE MAY BE TRANSFERRED TO A SUCCESSOR DEPOSITARY WITH THE PRIOR
     WRITTEN CONSENT OF THE COMPANY."

     "UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR NOTES IN
     DEFINITIVE FORM, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE
     DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY
     TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY
     OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH
     SUCCESSOR DEPOSITARY.

                                       41
<PAGE>
     UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTA TIVE OF
     THE DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) ("DTC"),
     TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR
     PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO.
     OR SUCH OTHER NAME AS MAY BE REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF
     DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR SUCH OTHER ENTITY AS MAY BE
     REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANS FER, PLEDGE OR
     OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL
     INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST
     HEREIN."

                  (3) Reg S Temporary Global Note Legend. To the extent required
by the Depositary, each Reg S Temporary Global Note shall bear a legend in
substantially the following form:

     "THE RIGHTS ATTACHING TO THIS REGULATION S TEMPORARY GLOBAL NOTE, AND THE
     CONDITIONS AND PROCEDURES GOVERNING ITS EXCHANGE FOR DEFINITIVE NOTES, ARE
     AS SPECIFIED IN THE INDENTURE (AS DEFINED HEREIN). NEITHER THE HOLDER NOR
     THE BENEFICIAL OWNERS OF THIS REGULATION S TEMPORARY GLOBAL NOTE SHALL BE
     ENTITLED TO RECEIVE CASH PAYMENTS OF INTEREST DURING THE PERIOD WHICH SUCH
     HOLDER HOLDS THIS NOTE. NOTHING IN THIS LEGEND SHALL BE DEEMED TO PREVENT
     INTEREST FROM ACCRUING ON THIS NOTE."

                  (h) Cancellation and/or Adjustment of Global Notes. At such
time as all beneficial interests in a particular Global Note have been exchanged
for Definitive Notes or a particular Global Note has been redeemed, repurchased
or cancelled in whole and not in part, each such Global Note shall be returned
to or retained and cancelled by the Trustee in accordance with Section 2.11
hereof. At any time prior to such cancellation, if any beneficial interest in a
Global Note is exchanged for or transferred to a Person who will take delivery
thereof in the form of a beneficial interest in another Global Note or for
Definitive Notes, the principal amount of Notes represented by such Global Note
shall be reduced accordingly and an endorsement may be made on such Global Note
by the Trustee or by the Depositary at the direction of the Trustee to reflect
such reduction; and if the beneficial interest is being exchanged for or
transferred to a Person who will take delivery thereof in the form of a
beneficial interest in another Global Note, such other Global Note shall be
increased accordingly and an endorsement may be made on such Global Note by the
Trustee or by the Depositary at the direction of the Trustee to reflect such
increase.

                  (i) General Provisions Relating to Transfers and Exchanges.

                    (i) To permit registrations of transfers and exchanges, the
Company shall execute and the Trustee shall authenticate Global Notes and
Definitive Notes upon receipt of an Authentication Order.

                    (ii) No service charge shall be made to a holder of a
beneficial interest in a Global Note or to a Holder of a Definitive Note for any
registration of transfer or exchange, but the Company may require payment of a
sum sufficient to cover any transfer tax

                                       42
<PAGE>
or similar governmental charge payable in connection therewith (other than any
such transfer taxes or similar governmental charge payable upon exchange or
transfer pursuant to Sections 2.10, 3.6, 4.13 or 4.16 hereof).

                    (iii) The Registrar shall not be required to register the
transfer of or exchange any Note selected for redemption in whole or in part,
except the unredeemed portion of any Note being redeemed in part.

                    (iv) All Global Notes and Definitive Notes issued upon any
registration of transfer or exchange of Global Notes or Definitive Notes shall
be the valid obligations of the Company, evidencing the same Indebtedness, and
entitled to the same benefits under this Indenture, as the Global Notes or
Definitive Notes surrendered upon such registration of transfer or exchange.

                    (v) The Company shall not be required (A) to issue, to
register the transfer of or to exchange any Notes during a period beginning at
the opening of business 15 days before the day of any selection of Notes for
redemption under Section 3.2 hereof and ending at the close of business on the
day of selection, (B) to register the transfer of or to exchange any Note so
selected for redemption in whole or in part, except the unredeemed portion of
any Note being redeemed in part or (C) to register the transfer of or to
exchange a Note between an Interest Record Date and the next succeeding Interest
Payment Date.

                    (vi) Prior to due presentment for the registration of a
transfer of any Note, the Trustee, any Agent and the Company may deem and treat
the Person in whose name any Note is registered as the absolute owner of such
Note for the purpose of receiving payment of principal of and interest on such
Notes and for all other purposes, and none of the Trustee, any Agent or the
Company shall be affected by notice to the contrary.

                    (vii) None of the Company, the Trustee, the Paying Agent or
the Registrar will have any responsibility or liability for any aspect of the
records relating to or payments made on account of beneficial ownership
interests of the Global Notes or for 429951.03-D.C. S1A maintaining, supervising
or reviewing any records relating to such beneficial ownership interests.

                    (viii) The Trustee shall authenticate Global Notes and
Definitive Notes in accordance with the provisions of Section 2.2 hereof.

                    (ix) All certifications, certificates and Opinions of
Counsel required to be submitted to the Registrar pursuant to this Section 2.6
to effect a registration of transfer or exchange may be submitted by facsimile.

                  Notwithstanding anything herein to the contrary, as to any
certifications and certificates delivered to the Registrar pursuant to this
Section 2.6, the Registrar's duties shall be limited to confirming that any such
certifications and certificates delivered to it are in the form of Exhibits A,
B, C, D and E attached hereto. The Registrar shall not be responsible for
confirming the truth or accuracy of representations made in any such
certifications or certificates.

                                       43
<PAGE>
SECTION 2.7       REPLACEMENT NOTES

                  If any mutilated Note is surrendered to the Trustee or the
Company and the Trustee and the Company receive evidence (which evidence may be
from the Trustee) to their satisfaction of the destruction, loss or theft of any
Note, the Company shall issue and the Trustee, upon receipt of an Authentication
Order, shall authenticate a replacement Note if the Trustee's and the Company's
requirements are met. If required by the Trustee or the Company, an indemnity
bond must be supplied by the Holder that is sufficient in the judgment of the
Trustee and the Company to protect the Company, the Trustee, any Agent and any
authenticat ing agent from any loss that any of them may suffer if a Note is
replaced. The Company may charge for its expenses in replacing a Note. Every
replacement Note is an additional obligation of the Company and shall be
entitled to all of the benefits of this Indenture equally and proportionately
with all other Notes duly issued hereunder.

SECTION 2.8       OUTSTANDING NOTES

                  The Notes outstanding at any time are all the Notes
authenticated by the Trustee (including any Note represented by a Global Note)
except for those cancelled by it or at its direction, those delivered to it for
cancellation, those reductions in the interest in a Global Note effected by the
Trustee in accordance with the provisions hereof, and those described in this
Section 2.8 as not outstanding. Except as set forth in Section 2.9 hereof, a
Note does not cease to be outstanding because the Company or an Affiliate of the
Company holds the Note. If a Note is replaced pursuant to Section 2.7 hereof,
such Note, together with the Guarantee of that particular Note endorsed thereon,
ceases to be outstanding unless the Trustee receives proof satisfactory to it
that the replaced Note is held by a bona fide purchaser. If the principal amount
of any Note is considered paid under Section 4.1 hereof, it ceases to be
outstanding and interest on it ceases to accrue. If the Paying Agent (other than
the Company, a Subsidiary or an Affiliate of any thereof) holds, on a redemption
date or the maturity date, money sufficient to pay Notes payable on that date,
then on and after that date such Notes shall be deemed to be no longer
outstanding and shall cease to accrue interest.

SECTION 2.9       TREASURY NOTES

                  In determining whether the Holders of the required principal
amount of Notes have concurred in any direction, waiver or consent, Notes owned
by the Company, or by any Person directly or indirectly controlling or
controlled by or under direct or indirect common control with the Company, shall
be considered as though not outstanding, except that for the purposes of
determining whether the Trustee shall be protected in relying on any such
direction, waiver or consent, only Notes that the Trustee knows are so owned
shall be so disregarded.

SECTION 2.10      TEMPORARY NOTES

                  Until certificates representing Notes are ready for delivery,
the Company may prepare and the Trustee, upon receipt of an Authentication
Order, shall authenticate temporary Notes. Temporary Notes shall be
substantially in the form of Definitive Notes but may have variations that the
Company considers appropriate for temporary Notes and as shall be reasonably
acceptable to the Trustee. Without unreasonable delay, the Company shall prepare
and the Trustee shall authenticate Definitive Notes in exchange for temporary
Notes. Holders of temporary Notes shall be entitled to all of the benefits of
this Indenture.

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<PAGE>
SECTION 2.11      CANCELLATION

                  The Company at any time may deliver Notes to the Trustee for
cancellation. The Registrar and Paying Agent shall forward to the Trustee any
Notes surrendered to them for registration of transfer, exchange or payment. The
Trustee, or at the direction of the Trustee, the Registrar or the Paying Agent
(other than the Company or an Affiliate of the Company), and no one else shall
cancel all Notes surrendered for registration of transfer, exchange, payment,
replacement or cancellation and shall destroy cancelled Notes (subject to the
record retention requirement of the Exchange Act). Certification of the
destruction of all cancelled Notes shall be delivered to the Company. The
Company may not issue new Notes to replace Notes that it has paid or that have
been delivered to the Trustee for cancellation.

SECTION 2.12      DEFAULTED INTEREST

                  Any interest on any Note which is payable, but is not
punctually paid or duly provided for, on any Interest Payment Date plus, to the
extent lawful, any interest payable on the defaulted interest at the rate and in
the manner provided in Section 4.1 hereof and in the Note (herein called
"Defaulted Interest") shall forthwith cease to be payable to the registered
holder on the relevant Interest Record Date, and such Defaulted Interest may be
paid by the Company, at its election in each case, as provided in clause (1) or
(2) below:

                    (1) The Company may elect to make payment of any Defaulted
          Interest to the Persons in whose names the Notes are registered at the
          close of business on a Special Record Date for the payment of such
          Defaulted Interest, which shall be fixed in the following manner. The
          Company shall notify the Trustee and the Paying Agent in writing of
          the amount of Defaulted Interest proposed to be paid on each Note and
          the date of the proposed payment, and at the same time the Company
          shall deposit with the Paying Agent an amount of cash equal to the
          aggregate amount proposed to be paid in respect of such Defaulted
          Interest or shall make arrangements reasonably satisfactory to the
          Paying Agent for such deposit prior to the date of the proposed
          payment, such cash when deposited to be held in trust for the benefit
          of the Persons entitled to such Defaulted Interest as provided in this
          clause (1). Thereupon the Paying Agent shall fix a "Special Record
          Date" for the payment of such Defaulted Interest which shall be not
          more than 15 days and not less than 10 days prior to the date of the
          proposed payment and not less than 10 days after the receipt by the
          Paying Agent of the notice of the proposed payment. The Paying Agent
          shall promptly notify the Company and the Trustee of such Special
          Record Date and, in the name and at the expense of the Company, shall
          cause notice of the proposed payment of such Defaulted Interest and
          the Special Record Date therefor to be mailed, first-class postage
          prepaid, to each Holder at its address as it appears in the Note
          register maintained by the Registrar not less than 10 days prior to
          such Special Record Date. Notice of the proposed payment of such
          Defaulted Interest and the Special Record Date therefor having been
          mailed as aforesaid, such Defaulted Interest shall be paid to the
          persons in whose names the Notes (or their respective predecessor
          Notes) are registered on such Special Record Date and shall no longer
          be payable pursuant to the following clause (2).

                      (2) The Company may make payment of any Defaulted Interest
         in any other lawful manner not inconsistent with the requirements of
         any securities exchange on which the Notes may be listed, and upon such
         notice as may be required by such

                                       45
<PAGE>
          exchange, if, after notice given by the Company to the Trustee and the
          Paying Agent of the proposed payment pursuant to this clause, such
          manner shall be deemed practicable by the Trustee and the Paying
          Agent.

                  Subject to the foregoing provisions of this Section 2.12, each
Note delivered under this Indenture upon registration of transfer of or in
exchange for or in lieu of any other Note shall carry the rights to interest
accrued and unpaid, and to accrue, which were carried by such other Note.

SECTION 2.13      CUSIP NUMBERS

                  The Company in issuing the Notes may use "CUSIP" numbers (if
then generally in use), and, if so, the Trustee shall use "CUSIP" numbers in
notices of redemption as a convenience to Holders; provided that any such notice
may state that no representation is made as to the correctness of such numbers
either as printed on the Notes or as contained in any notice of a redemption and
that reliance may be placed only on the other identification numbers printed on
the Notes, and any such redemption shall not be affected by any defect in or
omission of such numbers. The Company will promptly notify the Trustee of any
change in the "CUSIP" numbers.

                                   ARTICLE III
                                   REDEMPTION

SECTION 3.1       NOTICES TO TRUSTEE

                  If the Company elects to redeem Notes pursuant to the optional
redemption provisions of Section 3.7 hereof, it shall furnish to the Trustee, at
least 30 days (unless a shorter period is acceptable to the Trustee) but not
more than 60 days (unless a longer period is acceptable to the Trustee) before a
Redemption Date, an Officers' Certificate setting forth (i) the clause of this
Indenture pursuant to which the redemption shall occur, (ii) the Redemption
Date, (iii) the principal amount of Notes to be redeemed and (iv) the redemption
price.

SECTION 3.2       SELECTION OF NOTES TO BE REDEEMED

                  If less than all of the Notes are to be redeemed at any time,
the Trustee shall select the Notes or portions thereof to be redeemed among the
Holders of the Notes in compliance with the requirements of the principal
national securities exchange, if any, on which the Notes are listed or, if the
Notes are not so listed, on a pro rata basis, by lot or in accordance with any
other method the Trustee considers fair and appropriate. In the event of partial
redemption by lot, the particular Notes to be redeemed shall be selected, unless
otherwise provided herein, not less than 30 nor more than 60 days prior to the
Redemption Date by the Trustee from the outstanding Notes not previously called
for redemption.

                  The Trustee shall promptly notify the Company in writing of
the Notes selected for redemption and, in the case of any Note selected for
partial redemption, the principal amount thereof to be redeemed. Notes and
portions of Notes in denominations of larger than $1,000 selected shall be in
amounts of $1,000 or integral multiples of $1,000; except that if all of the
Notes of a Holder are to be redeemed, the entire outstanding amount of Notes
held by such Holder, even if not an integral multiple of $1,000, shall be
redeemed. Except as

                                       46
<PAGE>
provided in the preceding sentence, provisions of this Indenture that apply to
Notes called for redemption also apply to portions of Notes called for
redemption.

SECTION 3.3       NOTICE OF REDEMPTION

                  Subject to the provisions of Section 3.7 hereof, at least 30
days but not more than 60 days before a Redemption Date, the Company shall mail
or cause to be mailed, by first class mail, a notice of redemption to each
Holder whose Notes are to be redeemed at its registered address.

                  The notice shall identify the Notes to be redeemed and shall
state:

                  (a) the Redemption Date;

                  (b) the redemption price;

                  (c) if any Note is being redeemed in part, the portion of the
principal amount of such Note to be redeemed and that, on or after the
Redemption Date upon surrender of such Note, a new Note or Notes in principal
amount equal to the unredeemed portion shall be issued upon cancellation of the
original Note;

                  (d) the name and address of the Paying Agent;

                  (e) that Notes called for redemption must be surrendered to
the Paying Agent to collect the redemption price;

                  (f) that, unless the Company defaults in making such
redemption payment, interest on Notes called for redemption ceases to accrue on
and after the Redemption Date;

                  (g) the paragraph of the Notes and/or Section of this
Indenture pursuant to which the Notes called for redemption are being redeemed;
and

                  (h) that no representation is made as to the correctness or
accuracy of the CUSIP number, if any, listed in such notice or printed on the
Notes.

                  At the Company's request, the Trustee shall give the notice of
redemption in the Company's name and at its expense; provided, however, that the
Company shall have delivered to the Trustee, at least 45 days prior to the
Redemption Date (unless a shorter period shall be acceptable to the Trustee), an
Officers' Certificate requesting that the Trustee give such notice and setting
forth the information to be stated in such notice as provided in the preceding
paragraph.

                  Failure to send such notice in the manner herein provided to
the Holder of any particular Note designated for redemption as a whole or in
part, or any defect in the notice to such Holder, shall not affect the validity
of the proceedings for the redemption of any other Notes or portions thereof.

                                       47
<PAGE>
SECTION 3.4       EFFECT OF NOTICE OF REDEMPTION

                  Once notice of redemption is mailed in accordance with Section
3.3 hereof, Notes called for redemption become irrevocably due and payable on
the Redemption Date at the redemption price. A notice of redemption may not be
conditional.

SECTION 3.5       DEPOSIT OF REDEMPTION PRICE

                  On or prior to the Redemption Date, the Company shall deposit
with the Trustee or with the Paying Agent immediately available funds sufficient
to pay the redemption price of and accrued and unpaid interest (and Liquidated
Damages, if any) on all Notes to be redeemed on that date. The Trustee or the
Paying Agent shall promptly return to the Company any money deposited with the
Trustee or the Paying Agent by the Company in excess of the amounts necessary to
pay the redemption price of, and accrued and unpaid interest (and Liquidated
Damages, if any) on, all Notes to be redeemed.

                  If the Company complies with the provisions of the preceding
paragraph, on and after the Redemption Date, interest shall cease to accrue on
the Notes or the portions of Notes called for redemption. If a Note is redeemed
on or after an Interest Record Date but on or prior to the related Interest
Payment Date, then any accrued and unpaid interest (and Liquidated Damages, if
any) shall be paid to the Person in whose name such Note was registered at the
close of business on such Interest Record Date. If any Note called for
redemption shall not be so paid upon surrender for redemption because of the
failure of the Company to comply with the preceding paragraph, interest shall be
paid on the unpaid principal, from the Redemption Date until such principal is
paid, and to the extent lawful on any interest not paid on such unpaid
principal, in each case at the rate provided in the Notes and in Section 4.1
hereof.

SECTION 3.6       NOTES REDEEMED IN PART

                  Upon surrender of a Note that is redeemed in part, the Company
shall issue and, upon receipt of an Authentication Order, the Trustee shall
authenticate for the Holder at the expense of the Company a new Note equal in
principal amount to the unredeemed portion of the Note surrendered.

SECTION 3.7       OPTIONAL REDEMPTION

                  (a) Except as set forth in clause (b) of this Section 3.7, the
Company shall not have the option to redeem the Notes pursuant to this Section
3.7 prior to August 15, 2003. The Notes shall be redeemable for cash at the
option of the Company, in whole or in part, at any time on or after August 15,
2003, upon not less than 30 days nor more than 60 days prior notice mailed by
first class mail to each Holder at its last registered address, at the following
redemption prices (expressed as percentages of the principal amount) if redeemed
during the 12-month period commencing August 15 of the years indicated below, in
each case, together with accrued and unpaid interest (and Liquidated Damages, if
any) thereon, to the date of redemption of the Notes (the "Redemption Date")
(subject to the right of Holders of record on an Interest Record Date to receive
the corresponding interest due (and the corresponding Liquidated Damages, if
any) on the corresponding Interest Payment Date that is on or prior to such
Redemption Date):

                                       48
<PAGE>
<TABLE>
<CAPTION>
           Year                                     Percentage
           ----                                     ----------
<S>                                                 <C>
           2003.................................    104.000 %
           2004.................................    102.000 %
           2005 and thereafter..................    100.000 %
</TABLE>

                  (b) Notwithstanding the provisions of clause (a) of this
Section 3.7, at any time or from time to time prior to August 15, 2003, upon a
Public Equity Offering of the Company's common stock for cash, up to 35% of the
aggregate principal amount of the Notes issued pursuant to this Indenture (only
as necessary to avoid any duplication, excluding any replacement Notes) may be
redeemed at the Company's option within 90 days of the closing of any such
Public Equity Offering, on not less than 30 days, but not more than 60 days,
notice to each Holder of the Notes to be redeemed, with cash received by the
Company from the Net Cash Proceeds of such Public Equity Offering, at a
redemption price equal to 112.00% of the principal amount of the Notes (or
portion thereof) to be redeemed, together with accrued and unpaid interest (and
Liquidated Damages, if any) thereon, to the Redemption Date (subject to the
right of Holders of record on an Interest Record Date to receive the
corresponding interest due (and the corresponding Liquidated Damages, if any) on
the corresponding Interest Payment Date that is on or prior to such Redemption
Date); provided, however, that immediately following such redemption not less
than 65% of the aggregate principal amount of the Notes originally issued
pursuant to this Indenture on the Issue Date remain outstanding (only as
necessary to avoid any duplication, excluding any replacement Notes).

                  (c) Any redemption pursuant to this Section 3.7 shall be made
pursuant to the provisions of Sections 3.1 through 3.6 hereof.

SECTION 3.8       NO MANDATORY REDEMPTION

                  The Company shall not be required to make mandatory redemption
payments with respect to the Notes (however, the Company is required to offer to
repurchase Notes in accordance with the provisions of Sections 4.13 and 4.16
below). The Notes shall not have the benefit of any sinking fund.

                                   ARTICLE IV
                                    COVENANTS

SECTION 4.1       PAYMENT OF NOTES

                  The Company shall pay or cause to be paid the principal of,
premium, if any, and interest on the Notes on the dates and in the manner
provided in the Notes. Principal, premium, if any, and interest and Liquidated
Damages, if any, shall be considered paid on the date due if the Paying Agent,
if other than the Company or a Subsidiary thereof, holds as of 12:00 noon
Eastern time on the due date money deposited by the Company in immediately
available funds and designated for and sufficient to pay all principal, premium,
if any, and interest and Liquidated Damages, if any, then due. The Company shall
pay all Liquidated Damages, if any, in the same manner on the dates and in the
amounts set forth in the Note Registration Rights Agreement and herein.

                                       49
<PAGE>
                  The Company shall pay interest (including Accrued Bankruptcy
Interest in any proceeding under any Bankruptcy Law) on overdue principal at the
then applicable interest rate on the Notes to the extent lawful; it shall pay
interest (including Accrued Bankruptcy Interest in any proceeding under any
Bankruptcy Law) on overdue installments of interest and Liquidated Damages, if
any, (without regard to any applicable grace period) at the same rate to the
extent lawful.

SECTION 4.2       MAINTENANCE OF OFFICE OR AGENCY

                  The Company and the Guarantors shall maintain in the Borough
of Manhattan, The City of New York, an office or agency (which may be an office
of the Trustee or an affiliate of the Trustee, Registrar or co-registrar) where
Notes may be surrendered for registration of transfer or for exchange and where
notices and demands to or upon the Company and the Guarantors in respect of the
Notes and this Indenture may be served. The Company and the Guarantors shall
give prompt written notice to the Trustee of the location, and any change in the
location, of such office or agency. If at any time the Company and the
Guarantors shall fail to maintain any such required office or agency or shall
fail to furnish the Trustee with the address thereof, such presentations,
surrenders, notices and demands may be made or served at the Corporate Trust
Office of the Trustee.

                  The Company and the Guarantors may also from time to time
designate one or more other offices or agencies where the Notes may be presented
or surrendered for any or all such purposes and may from time to time rescind
such additional designations; provided that no such designation or rescission
shall in any manner relieve the Company and the Guarantors of their obligation
to maintain an office or agency in the Borough of Manhattan, The City of New
York. The Company and the Guarantors shall give prompt written notice to the
Trustee of any such designation or rescission and of any change in the location
of any such other office or agency.

                  The Company hereby designates the Corporate Trust Office of
the Trustee as one such office or agency of the Company in accordance with
Section 2.3 hereof.

SECTION 4.3       SEC REPORTS AND REPORTS TO HOLDERS

                  Whether or not the Company is subject to the reporting
requirements of Section 13 or 15(d) of the Exchange Act, the Company will
deliver to the Trustee and to each Holder of Notes, within 15 days after the
Company is or would have been (if the Company was subject to such reporting
obligations) required to file such with the SEC, (i) annual and quarterly
financial statements substantially equivalent to financial statements that would
have been included in reports on Forms 10-K or 10-Q (including, with respect to
annual information only, a report thereon by the Company's certified independent
public accountants as such would be required in such reports to the SEC, and, in
each case, together with a management's discussion and analysis of financial
condition and results of operations which would be so required) and (ii) all
information that would have been included in current reports on Form 8-K filed
with the SEC, if the Company were subject to the requirements of Section 13 or
15(d) of the Exchange Act, and, unless the SEC will not accept such reports,
file with the SEC the annual, quarterly and other reports which it is or would
have been required to file with the SEC. In addition, the Company and the
Guarantors agree that, prior to consummation of the Exchange Offer, they will
make available to the holders and to securities analysts and prospective
investors, upon their

                                       50
<PAGE>
request, the information required to be delivered pursuant to Rule 144A(d)(4)
under the Securities Act.

SECTION 4.4       COMPLIANCE CERTIFICATE

                  (a) The Company shall deliver to the Trustee, within 120 days
after the end of each fiscal year, an Officers' Certificate stating that a
review of the activities of the Company and its Subsidiaries during the
preceding fiscal year has been made under the supervision of the signing
Officers with a view to determining whether the Company and its Subsidiaries
have kept, observed, performed and fulfilled their obligations under this
Indenture (without regard to any period of grace or requirement of notice), and
further stating, as to each such Officer signing such certificate, that to his
or her knowledge the Company and its Subsidiaries are not in default in the
performance or observance of any of the terms, provisions and conditions of this
Indenture (or, if a Default or Event of Default shall have occurred and be
continuing, describing all such Defaults or Events of Default of which he or she
may have knowledge and what action the Company is taking or proposes to take
with respect thereto) and that to his or her knowledge no event has occurred and
remains in existence by reason of which payments on account of the principal of
or interest, if any, on the Notes is prohibited or if such event has occurred, a
description of the event and what action the Company is taking or proposes to
take with respect thereto. The Company shall provide the Trustee with timely
written notice of any change in its fiscal year end, which is currently December
31.

                  (b) The Company shall, so long as any of the Notes are
outstanding, deliver to the Trustee, within three Business Days of any Officer
becoming aware of any Default or Event of Default, an Officers' Certificate
specifying such Default or Event of Default and what action the Company is
taking or proposes to take with respect thereto.

SECTION 4.5       TAXES

                  The Company shall pay, and shall cause each of its
Subsidiaries to pay, prior to delinquency, all material taxes, assessments, and
governmental levies except such as are contested in good faith and by
appropriate proceedings or where the failure to effect such payment would not
have a material adverse effect on the ability of the Company and the Guarantors
to satisfy their obligations under the Notes, the Guarantees and this Indenture.

SECTION 4.6       STAY, EXTENSION AND USURY LAWS

                  The Company covenants (to the extent that it may lawfully do
so) that it shall not at any time insist upon, plead, or in any manner
whatsoever claim or take the benefit or advantage of, any stay, extension or
usury law wherever enacted, now or at any time hereafter in force, that may
affect the covenants or the performance of this Indenture; and the Company (to
the extent that it may lawfully do so) hereby expressly waives all benefit or
advantage of any such law, and covenants that it shall not, by resort to any
such law, hinder, delay or impede the execution of any power herein granted to
the Trustee, but shall suffer and permit the execution of every such power as
though no such law has been enacted.

                                       51
<PAGE>
SECTION 4.7       LIMITATION ON INCURRENCE OF ADDITIONAL INDEBTEDNESS AND
                  DISQUALIFIED CAPITAL STOCK

                  Except as set forth in this Section 4.7, the Company and the
Guarantors shall not, and shall not permit any of their Subsidiaries to,
directly or indirectly, issue, assume, guaranty, incur, become directly or
indirectly liable with respect to (including as a result of an Acquisition), or
otherwise become responsible for, contingently or otherwise (individually and
collectively, to "incur" or, as appropriate, an "incurrence"), any Indebtedness
(including Disqualified Capital Stock and Acquired Indebtedness), other than
Permitted Indebtedness.

                  Notwithstanding the foregoing, if:

                  (1) no Default or Event of Default shall have occurred and be
         continuing at the time of, or would occur after giving effect on a pro
         forma basis to, such incurrence of Indebtedness;

                  (2) on the date of such incurrence (the "Incurrence Date"),
         the Company's Interest Coverage Ratio for the Reference Period
         immediately preceding the Incurrence Date, after giving effect on a pro
         forma basis to such incurrence of such Indebtedness and, to the extent
         set forth in the definition of Interest Coverage Ratio, the use of
         proceeds thereof, would be at least 2.0 to 1.0 (the "Debt Incurrence
         Ratio"); and

                  (3) such Indebtedness is Subordinated Indebtedness or is
Purchase Money Indebtedness that is permitted to be secured by a Lien pursuant
to clause (i) of the definition of "Permitted Liens,"

then the Company and the Guarantors may incur such Indebtedness (including
Disqualified Capital Stock and Acquired Indebtedness).

                  Indebtedness (including Disqualified Capital Stock) of any
Person which is outstanding at the time such Person becomes one of the Company's
Subsidiaries (including upon designation of any Person as a Subsidiary) or is
merged with or into or consolidated with the Company or one of its Subsidiaries
shall be deemed to have been incurred at the time such Person becomes or is
designated one of the Company's Subsidiaries or is merged with or into or
consolidated with the Company or one of its Subsidiaries as applicable.

                  Notwithstanding any other provision of this Section 4.7, but
only to avoid duplication, a guarantee by a Guarantor of the Company's
Indebtedness or of the Indebtedness of another Guarantor incurred in accordance
with the terms of this Indenture (other than guarantees with respect to
Indebtedness incurred pursuant to clause (b) of the definition of Permitted
Indebtedness made at the time such Indebtedness was incurred or, if later, at
the time the guarantor thereof became a Guarantor) will not constitute a
separate incurrence, or amount outstanding, of Indebtedness. Upon each
incurrence, the Company may designate pursuant to which provision of this
Section 4.7 (including which portion of the definition of Permitted
Indebtedness) such Indebtedness is being incurred and the Company may subdivide
an amount of Indebtedness and such Indebtedness shall not be deemed to have been
incurred or outstanding under any other provision of this Section 4.7 (or other
portion of the definition of Permitted Indebtedness) (except that all
Indebtedness outstanding under the Credit Agreement on the original Issue Date
shall be deemed to have been incurred pursuant to clause (f) of the definition

                                       52
<PAGE>
of Permitted Indebtedness and all Indebtedness under the Notes, the Guarantees
and this Indenture shall be deemed to have been incurred pursuant to clause (a)
of the definition of Permitted Indebtedness).

SECTION 4.8       LIMITATION ON LIENS

                  The Company shall not, and the Guarantors shall not, and shall
not permit any of their Subsidiaries to, create, incur, assume or suffer to
exist any Lien of any kind, other than Permitted Liens, upon any of their
respective assets (including, without limitation, all real, tangible or
intangible property) now owned or acquired on or after the date of this
Indenture or upon any income or profits therefrom or convey any right to receive
income therefrom.

SECTION 4.9       LIMITATION ON RESTRICTED PAYMENTS

                  The Company and the Guarantors shall not, and shall not permit
any of their Subsidiaries to, directly or indirectly, make any Restricted
Payment if, after giving effect to such Restricted Payment on a pro forma basis:

                  (1) a Default or an Event of Default shall have occurred and
         be continuing;

                  (2) the Company is not permitted to incur at least $1.00 of
         additional Indebtedness pursuant to the Debt Incurrence Ratio in
         Section 4.7 hereof; or

                  (3) the aggregate amount of all Restricted Payments made by
         the Company and its Subsidiaries, on and after the Issue Date, would
         exceed, without duplication, the sum of:

                           (a) 50% of the Company's aggregate Consolidated Net
                  Income for the period (taken as one accounting period),
                  commencing on the first day of the fiscal quarter in which the
                  Issue Date occurs, to and including the last day of the fiscal
                  quarter ended immediately prior to the date of each such
                  calculation for which the Company's consolidated financial
                  statements are required to be delivered to the Trustee or, if
                  sooner, filed with the SEC (or, in the event Consolidated Net
                  Income for such period is a deficit, then minus 100% of such
                  deficit), plus

                           (b) 100% of the aggregate Net Cash Proceeds received
                  by the Company from the issuance or sale of the Company's
                  Qualified Capital Stock, (other than (i) to one of the
                  Company's Subsidiaries, (ii) to the extent applied in
                  connection with a Qualified Exchange or, to avoid duplication,
                  otherwise given credit for in any provision of this or the
                  following paragraph or (iii) used as consideration to make a
                  Permitted Investment), after the Issue Date, plus

                           (c) except in each case, in order to avoid
                  duplication, to the extent any such payment or proceeds have
                  been included in the calculation of Consolidated Net Income,
                  an amount equal to the net reduction in Investments (other
                  than returns of or from Permitted Investments) in any Person
                  (including an Unrestricted Subsidiary) resulting from cash
                  distributions on or cash repayments of any Investments,
                  including payments of interest on Indebtedness,
                                       53
<PAGE>
                  dividends, repayments of loans or advances, or other
                  distributions or other transfers of assets, in each case to
                  the Company or any Subsidiary or from the Net Cash Proceeds
                  from the sale of any such Investment or from redesignations of
                  Unrestricted Subsidiaries as Subsidiaries (valued in each case
                  as provided in the definition of "Investments"), not to
                  exceed, in each case, the amount of Investments previously
                  made by the Company or any Subsidiary in such Person,
                  including, if applicable, such Unrestricted Subsidiary, less
                  the cost of disposition.

                  The foregoing clauses (2) and (3) of the immediately preceding
paragraph of this Section 4.9, however, shall not prohibit:

                  (w) repurchases, redemptions, or other retirements or
         acquisitions of Capital Stock from the Company's employees, directors
         or managers (or their heirs or estates) or employees, directors or
         managers (or their heirs or estates) of the Company's Subsidiaries upon
         the death, disability or termination of employment or pursuant to the
         terms of any subscription, stockholder or other agreement or plan in
         effect on the Issue Date in an aggregate amount pursuant to this clause
         (w) to all employees, directors or managers (or their heirs or estates)
         not to exceed (i) $500,000 per year on and after the Issue Date, or
         (ii) $2,000,000 in the aggregate pursuant to this clause (w); provided
         that the Company's purchase of up to 303,000 shares of its common stock
         from employees to pay for income tax obligations which arise in
         connection with the vesting of restricted stock awards granted prior to
         the Issue Date shall not count for purposes of the limits contained in
         clauses (i) and (ii) hereof;

and the foregoing clauses (1), (2) and (3) of the immediately preceding
paragraph of this Section 4.9 shall not prohibit:

                  (x) any dividend, distribution or other payment by any of the
         Company's Subsidiaries on the Company's Equity Interests that is paid
         pro rata to all holders of such Equity Interests;

                  (y) a Qualified Exchange; or

                  (z) the payment of any dividend on Qualified Capital Stock
         within 60 days after the date of its declaration if such dividend could
         have been made on the date of such declaration in compliance with the
         foregoing provisions.

                  The full amount of any Restricted Payment made pursuant to the
foregoing clauses (w), (x) and (z) (but not pursuant to clause (y)) of the
immediately preceding sentence, however, shall be counted as Restricted Payments
made for purposes of the calculation of the aggregate amount of Restricted
Payments available to be made referred to in clause (3) of the first paragraph
of this Section 4.9.

                  For purposes of this Section 4.9, the amount of any Restricted
Payment made or returned, if other than in cash, shall be the fair market value
thereof, as determined in the good faith reasonable judgment of the Company's
Board of Directors, at the time made or returned, as applicable. Additionally,
within 5 Business Days of each Restricted Payment, the Company shall deliver an
Officers' Certificate to the Trustee describing in reasonable detail the

                                       54
<PAGE>
nature of such Restricted Payment, stating the amount of such Restricted
Payment, stating in reasonable detail the provisions of this Indenture pursuant
to which such Restricted Payment was made and certifying that such Restricted
Payment was made in compliance with the terms of this Indenture.

SECTION 4.10      LIMITATION ON DIVIDENDS AND OTHER PAYMENT RESTRICTIONS
                  AFFECTING SUBSIDIARIES

                  The Company and the Guarantors shall not, and shall not permit
any of their Subsidiaries to, directly or indirectly, create, assume or suffer
to exist any consensual restriction on the ability of any of their Subsidiaries
to pay dividends or make other distributions to or on behalf of, or to pay any
obligation to or on behalf of, or otherwise to transfer assets or property to or
on behalf of, or make or pay loans or advances to or on behalf of, the Company,
the Guarantors or any of their Subsidiaries, except:

                  (1) restrictions imposed by the Notes, the Collateral
         Agreements or this Indenture or by the Company's other Indebtedness
         (which may also be guaranteed by the Guarantors) ranking pari passu
         with the Notes or the Guarantees, as applicable; provided, that such
         restrictions are no more restrictive in any material respect than those
         imposed by this Indenture, the Collateral Agreements and the Notes;

                  (2) restrictions imposed by applicable law;

                  (3) existing restrictions as of the Issue Date, including
         those under Existing Indebtedness;

                  (4) restrictions under any Acquired Indebtedness or Capital
         Stock of a Person acquired by the Company or any of the Guarantors not
         incurred in violation of this Indenture or any agreement relating to
         any property, asset, or business acquired by the Company, the
         Guarantors or any of their Subsidiaries, which restrictions, in each
         case, existed at the time of acquisition, were not put in place in
         connection with or in anticipation of such acquisition and are not
         applicable to any Person, other than the Person acquired, or to any
         property, asset or business, other than the property, assets and
         business so acquired;

                  (5) any restriction imposed by Indebtedness incurred under the
         Credit Agreement pursuant to clause (f) of the definition of "Permitted
         Indebtedness"; provided, that such restriction or requirement is no
         more restrictive in any material respect than that imposed by the
         Credit Agreement on the Issue Date;

                  (6) restrictions with respect solely to any of the Company's
         Subsidiaries imposed pursuant to a binding agreement which has been
         entered into for the sale or disposition of all of the Equity Interests
         or assets of such Subsidiary; provided, that such restrictions apply
         solely to the Equity Interests or assets of such Subsidiary which are
         being sold;

                  (7) restrictions on transfer contained in Purchase Money
         Indebtedness incurred pursuant to Section 4.7 hereof or clause (g) of
         the definition of "Permitted
                                       55
<PAGE>
         Indebtedness;" provided, that such restrictions relate only to the
         transfer of the property acquired with the proceeds of such Purchase
         Money Indebtedness;

                  (8) in connection with and pursuant to permitted refinancings,
         the replacements of restrictions imposed pursuant to clauses (1), (3),
         (4) or (7) or this clause (8) of this paragraph that are not more
         restrictive in any material respect than those being replaced and do
         not apply to any other Person or assets than those that would have been
         covered by the restrictions in the Indebtedness so refinanced; and

                  (9) any other customary provisions arising or agreed to in the
ordinary course of business consistent with past practice, not relating to
Indebtedness or Capital Stock, that do not individually or in the aggregate
detract from the value of the assets of the Company or any Guarantor.

                  Notwithstanding the foregoing, (a) leases, licenses or
contracts entered into in the ordinary course of business, consistent with
industry practice may be subject to customary restrictions on subletting or
assignment, and (b) any asset subject to a Lien which is not prohibited to exist
with respect to such asset pursuant to the terms of this Indenture, may be
subject to customary restrictions on the transfer or disposition thereof
pursuant to such Lien.

                  Nothing contained in this Section 4.10 shall prevent the
Company or any Subsidiary from creating, incurring, assuming or suffering to
exist any Lien otherwise permitted pursuant to Section 4.8 hereof.

SECTION 4.11      LIMITATION ON IMPAIRMENT OF SECURITY INTERESTS

                  Except as permitted in this Indenture, the Intercreditor
Agreement and the Collateral Agreements, neither the Company nor any of its
Subsidiaries shall take or omit to take any action that would have the result of
materially adversely affecting or impairing the Lien on the Collateral in favor
of the Trustee for the benefit of the holders of the Notes.

SECTION 4.12      LIMITATION ON TRANSACTIONS WITH AFFILIATES

                  Neither the Company nor any of its Subsidiaries shall be
permitted on or after the Issue Date to enter into or suffer to exist any
contract, agreement, arrangement or transaction with any Affiliate (an
"Affiliate Transaction"), or any series of related Affiliate Transactions (other
than Exempted Affiliate Transactions and transactions subject to written
agreements to which the Company or any Subsidiary is a party as of the Issue
Date), unless (1) it is determined that the terms of such Affiliate Transaction
are fair and reasonable to the Company, and no less favorable to the Company
than could have been obtained in an arm's length transaction with a
non-Affiliate, and (2) if involving consideration to either party of $5,000,000
or more, such Affiliate Transaction(s) has been approved by a majority of the
members of the Company's Board of Directors that are disinterested in such
transaction, and (3) if involving consideration to either party of $10,000,000
or more (or if no members of the Board of Directors of the Company are
disinterested in such transaction), the Company and/or its applicable
Subsidiaries, prior to the consummation thereof, obtain a written favorable
opinion as to the fairness of such transaction to the Company from a financial
point of view from an independent investment banking firm of national reputation
in the United States or, if pertaining to a matter for which such investment
banking firms do not customarily render such opinions, an appraisal or

                                       56
<PAGE>
valuation firm of national reputation in the United States. Within 5 days of any
Affiliate Transaction(s) involving consideration to either party of $5,000,000
or more, the Company shall deliver to the Trustee an Officers' Certificate
addressed to the Trustee certifying that such Affiliate Transaction (or
Transactions) complied with clause (1), (2), and (3), as applicable.

SECTION 4.13      LIMITATION ON SALE OF ASSETS AND SUBSIDIARY STOCK

                  (a) The Company and the Guarantors shall not, and shall not
permit any of the Company's Subsidiaries to, in one or a series of related
transactions, convey, sell, transfer, assign or otherwise dispose of, directly
or indirectly, any of their property, business or assets, including by merger or
consolidation (in the case of a Guarantor or a Subsidiary or Unrestricted
Subsidiary of the Company), and including any sale or other transfer or issuance
of any Equity Interests of any of the Company's Subsidiaries or Unrestricted
Subsidiaries, whether by the Company or one of its Subsidiaries or Unrestricted
Subsidiaries or through the issuance, sale or transfer of Equity Interests by
one of the Company's Subsidiaries or Unrestricted Subsidiaries and including any
sale-leaseback transaction (any of the foregoing, an "Asset Sale"), unless, with
respect to any Asset Sale or related series of Asset Sales involving securities,
property or assets with an aggregate fair market value in excess of $5,000,000
(an Asset Sale (including a series of related Asset Sales) of less than
$5,000,000 shall not be subject to this Section 4.13), (a) at least 75% of the
total consideration for such Asset Sale or series of related Asset Sales
consists of cash or Cash Equivalents, and (b) the Company's Board of Directors
determines in good faith that the Company will be receiving or such Subsidiary
will be receiving, as applicable, fair market value for such Asset Sale. Solely
for purposes of the preceding sentence, "cash and Cash Equivalents" shall also
include, (i) Purchase Money Indebtedness secured solely by the assets sold and
assumed by a transferee; provided, that the Company and its Subsidiaries are
fully released from obligations in connection therewith, (ii) assets for use in
a Related Business or Equity Interests of a Person that becomes a Guarantor
which is primarily engaged in a Related Business, (iii) Indebtedness incurred
under the Credit Agreement that is assumed by a transferee; provided that the
Company and its Subsidiaries are fully released from obligations in connection
with the amounts assumed and the assumed Indebtedness permanently reduced the
Indebtedness under the Credit Agreement (and in the case of a revolver or
similar arrangement that makes credit available, such commitment is permanently
reduced by such amount), (iv) property that within 30 days of such Asset Sale is
converted into cash or Cash Equivalents; provided, that such cash and Cash
Equivalents shall be treated as Net Cash Proceeds attributable to the original
Asset Sale for which such property was received and (v) TMS Indebtedness;
provided that the Company and its Subsidiaries are fully released from
obligations in connection with the amounts assumed.

                  (b) Within 360 days following such Asset Sale, Net Cash
Proceeds therefrom (the "Asset Sale Amount") shall be:

                  (1) used (i) to retire Purchase Money Indebtedness secured by
         the asset which was the subject of the Asset Sale; or (ii) to retire
         and permanently reduce Indebtedness incurred under the Credit
         Agreement; provided, that in the case of a revolver or similar
         arrangement that makes credit available, such commitment is permanently
         reduced by such amount; or

                                       57
<PAGE>
                  (2) used to make (i) capital expenditures or (ii) investments
         in assets and property (other than notes, bonds, obligations and
         securities, except in connection with the acquisition of a Person in a
         Related Business that becomes a Guarantor) which in the good faith
         reasonable judgment of the Company's Board of Directors will
         immediately constitute or be a part of a Related Business of the
         Company or such Guarantor (if it continues to be a Guarantor)
         immediately following such transaction; or the Company shall, within
         such 360-day period, enter into a legally binding agreement to apply
         such Net Cash Proceeds as described in this clause (b) within six
         months after such agreement is entered into and apply such Net Cash
         Proceeds in accordance with the provisions of this clause (b);
         provided, that if such agreement terminates the Company shall have
         until the later of (i) 90 days after the date of such termination and
         (ii) 360 days after the date of the Asset Sale resulting in such Net
         Cash Proceeds to effect such application.

                  (c) The accumulated Net Cash Proceeds from Asset Sales and
from any Event of Loss not applied as set forth in Section 4.13(b) shall
constitute "Excess Proceeds." Pending the final application of any Net Cash
Proceeds, the Company may temporarily reduce revolving credit borrowings or
otherwise invest or use for general corporate purposes (other than Restricted
Payments that are not solely Restricted Investments) the Net Cash Proceeds in
any manner that is not prohibited by this Indenture.

                  (d) When the Excess Proceeds equal or exceed $10,000,000,
within 10 Business Days the Company shall offer to repurchase the Notes,
together with any other Indebtedness ranking on a parity with the Notes and with
similar provisions requiring the Company to make an offer to purchase such
Indebtedness with the proceeds from such Asset Sale pursuant to a cash offer
(subject only to conditions required by applicable law, if any), pro rata in
proportion to the respective principal amounts of such Indebtedness (or accreted
values in the case of Indebtedness issued with an original issue discount) and
the Notes (the "Asset Sale Offer") at a purchase price of 100% of the principal
amount (or accreted value in the case of Indebtedness issued with an original
issue discount) (the "Asset Sale Offer Price") together with accrued and unpaid
interest and Liquidated Damages, if any, to the date of payment. The Asset Sale
Offer shall remain open for at least 20 Business Days following its commencement
(the "Asset Sale Offer Period").

                  (e) Upon expiration of the Asset Sale Offer Period, the
Company shall apply an amount equal to the Excess Proceeds (the "Asset Sale
Offer Amount") plus an amount equal to accrued and unpaid interest and
Liquidated Damages, if any, to the purchase of all Indebtedness properly
tendered in accordance with the provisions hereof (on a pro rata basis if the
Asset Sale Offer Amount is insufficient to purchase all Indebtedness so
tendered) at the Asset Sale Offer Price (together with accrued and unpaid
interest and Liquidated Damages, if any, to the day of payment). To the extent
that the aggregate amount of Notes and such other pari passu Indebtedness
tendered pursuant to an Asset Sale Offer is less than the Asset Sale Offer
Amount, the Company may use any remaining Net Cash Proceeds as otherwise
permitted by this Indenture. Following the consummation of each Asset Sale
Offer, the Excess Proceeds amount shall be reset to zero.

                  (f) Notwithstanding, and without complying with, the
provisions of this Section 4.13:

                                       58
<PAGE>
                  (1) the Company may and its Subsidiaries may, in the ordinary
         course of business, (a) convey, sell, transfer, assign or otherwise
         dispose of inventory and other assets acquired and held for resale in
         the ordinary course of business and (b) liquidate Cash Equivalents;

                  (2) the Company may and its Subsidiaries may convey, sell,
         transfer, assign or otherwise dispose of assets pursuant to and in
         accordance with Section 5.1;

                  (3) the Company may and its Subsidiaries may sell or dispose
         of damaged, worn out or other obsolete personal property in the
         ordinary course of business so long as such property is no longer
         necessary for the proper conduct of the Company's business or the
         business of such Subsidiary, as applicable;

                  (4) the Company may and its Subsidiaries may convey, sell,
         transfer, assign or otherwise dispose of assets to the Company or any
         of the Guarantors;

                  (5) the Company may and each of its Subsidiaries may settle,
         release or surrender tort or other litigation claims in the ordinary
         course of business or grant Liens not prohibited by this Indenture; and

                  (6) the Company may and its Subsidiaries may make Permitted
         Invest ments (other than pursuant to clause (a) of the definition
         thereof) and Restricted Investments that are not prohibited by Section
         4.9 hereof.

                  (g) All Net Cash Proceeds from an Event of Loss shall be
reinvested or used as otherwise provided above in clauses (1) or (2) of Section
4.13(b).

                  (h) Any Asset Sale Offer shall be made in compliance with all
applicable laws, rules, and regulations, including, if applicable, Regulation
14E of the Exchange Act and the rules and regulations thereunder and all other
applicable Federal and state securities laws. To the extent that the provisions
of any securities laws or regulations conflict with the provisions of this
Section 4.13, the Company's compliance or the compliance of any of its
Subsidiaries with such laws and regulations shall not in and of itself cause a
breach of the Company's obligations under this Section 4.13.

                  If the payment date in connection with an Asset Sale Offer
hereunder is on or after an Interest Record Date and on or before the associated
Interest Payment Date, any accrued and unpaid interest (and Liquidated Damages,
if any, due on such Interest Payment Date) will be paid to the Person in whose
name a Note is registered at the close of business on such Interest Record Date.

SECTION 4.14      LIMITATION ON SALE-LEASEBACK TRANSACTIONS

                  The Company will not, and will not permit any of its
Subsidiaries to, enter into any sale-leaseback transaction (other than a
sale-leaseback transaction between the Company and one or more Guarantors or
among Guarantors); provided that the Company and its Subsidiaries may enter into
a sale-leaseback transaction if:

                                       59
<PAGE>
                  (1) the Company or such Subsidiary could have (a) incurred
         Indebtedness in an amount equal to the Attributable Indebtedness
         relating to such sale-leaseback transaction under the Debt Incurrence
         Ratio in the second paragraph of Section 4.7 hereof and (b) incurred a
         Lien to secure such Indebtedness pursuant to Section 4.8 hereof;

                  (2) the gross cash proceeds of such sale-leaseback transaction
         are at least equal to the fair market value, as determined in good
         faith by the Board of Directors and set forth in an Officers'
         Certificate delivered to the Trustee, of the property that is the
         subject of such sale-leaseback transaction; and

                  (3) the transfer of assets in such sale-leaseback transaction
         is permitted by, and the Company applies the proceeds of such
         transaction in compliance with, Section 4.13 hereof.

SECTION 4.15      LIMITATION ON LAYERING INDEBTEDNESS

                  The Company and the Guarantors shall not, directly or
indirectly, incur any Indebtedness that is contractually subordinated in right
of payment to any of the Company's other Indebtedness or the Indebtedness of any
Guarantor unless such Indebtedness is as contractually subordinated in right of
payment to the Notes or such Guarantor's Guarantee, as applicable, at least to
the same extent as it is to such other Indebtedness or Indebtedness of such
Guarantor.

SECTION 4.16      REPURCHASE OF NOTES AT THE OPTION OF THE HOLDER UPON A CHANGE
                  OF CONTROL

                  In the event that a Change of Control has occurred, each
Holder of Notes will have the right, at such Holder's option, pursuant to an
offer (subject only to conditions required by applicable law, if any) by the
Company (the "Change of Control Offer"), to require the Company to repurchase
all or any part of such Holder's Notes (provided, that the principal amount of
such Notes must be $1,000 or an integral multiple thereof) on a date (the
"Change of Control Purchase Date") that is no later than 45 Business Days after
the occurrence of such Change of Control, at a cash price equal to the following
purchase prices (expressed as percentages of the principal amount) if such
Change of Control occurs during the 12-month period commencing August 15 of the
years indicated below (the "Change of Control Purchase Price"), in each case,
together with accrued and unpaid interest (and Liquidated Damages, if any)
thereon, to the Change of Control Purchase Date.

<TABLE>
<CAPTION>
           Year                                 Percentage
           ----                                 ----------
<S>                                             <C>
           2002..............................   106.000 %
           2003..............................   104.000 %
           2004..............................   102.000 %
           2005 and thereafter...............   100.000 %
</TABLE>

                  The Change of Control Offer shall be made within 25 Business
Days following a Change of Control and shall remain open for at least 20
Business Days following its commencement (the "Change of Control Offer Period").
Upon expiration of the Change of

                                       60
<PAGE>
Control Offer Period, the Company promptly shall purchase all Notes properly
tendered in response to the Change of Control Offer.

                  On or before the Change of Control Purchase Date, the Company
shall:

                    (1) accept for payment Notes or portions thereof properly
tendered pursuant to the Change of Control Offer;

                    (2) deposit with the Paying Agent cash sufficient to pay the
Change of Control Purchase Price (together with accrued and unpaid interest and
Liquidated Damages, if any) of all Notes so tendered; and

                    (3) deliver to the Trustee the Notes so accepted together
with an Officers' Certificate listing the Notes or portions thereof being
purchased by the Company.

                  The Paying Agent promptly will pay the Holders of Notes so
accepted an amount equal to the Change of Control Purchase Price (together with
accrued and unpaid interest and Liquidated Damages, if any) and the Trustee
promptly will authenticate and deliver to such Holders a new Note equal in
principal amount to any unpurchased portion of the Note surrendered. Any Notes
not so purchased will be delivered promptly by the Company to the Holder
thereof. The Company publicly will announce the results of the Change of Control
Offer on or as soon as practicable after the Change of Control Purchase Date.

                  Any Change of Control Offer will be made in compliance with
all applicable laws, rules and regulations, including, if applicable, Regulation
14E under the Exchange Act and the rules thereunder and all other applicable
Federal and state securities laws. To the extent that the provisions of any
securities laws or regulations conflict with the provisions of this Section
4.16, the Company's compliance with such laws and regulations shall not in and
of itself cause a breach of its obligations under this Section 4.16.

                  If the Change of Control Purchase Date is on or after an
Interest Record Date and on or before the associated Interest Payment Date, any
accrued and unpaid interest (and Liquidated Damages, if any) due on such
Interest Payment Date will be paid to the Person in whose name a Note is
registered at the close of business on such Interest Record Date.

                  The Company shall not be required to make a Change of Control
Offer upon a Change of Control if a third party makes the Change of Control
Offer in the manner, at the times and otherwise in compliance with the
requirements set forth in this Indenture applicable to a Change of Control made
by the Company and purchases all Notes validly tendered and not withdrawn under
such Change of Control Offer.

SECTION 4.17      SUBSIDIARY GUARANTORS

                  All of the Company's present and future Subsidiaries (other
than the Non- Guarantor Subsidiaries unless and until the revenue of the
Non-Guarantor Subsidiaries, in the aggregate, exceeds 1% of the revenue of the
Company and its Consolidated Subsidiaries, or the book value of the assets of
the Non-Guarantor Subsidiaries, in the aggregate, exceeds 1% of the book value
of the assets of the Company and its Consolidated Subsidiaries) jointly and
severally will guaranty all principal, premium, if any, and interest on the
Notes on a senior subordinated

                                       61
<PAGE>
basis, grant a subordinated security interest in and/or pledge Collateral owned
by such Subsidiary to secure such Obligations on the terms set forth in the
Collateral Agreements, and deliver to the Trustee an opinion of counsel that
such guaranty and Collateral Agreements have been duly authorized, executed and
delivered.

                  Notwithstanding anything herein or in this Indenture to the
contrary, if any of the Company's Subsidiaries (other than OCC solely with
respect to its guarantee of the Credit Agreement) that is not a Guarantor
guarantees any of the Company's other Indebtedness or any other Indebtedness of
any Guarantor, or the Company or any of the Guarantors, individually or
collectively, pledges more than 65% of the Voting Equity Interests of a
Subsidiary (other than OCC solely with respect to the Company's pledge of its
Voting Equity Interests under the Credit Agreement) that is not a Guarantor to a
lender to secure the Company's Indebtedness or any Indebtedness of any
Guarantor, then such Subsidiary must become a Guarantor and grant the security
interest as provided in this Section 4.17.

SECTION 4.18      LIMITATION ON STATUS AS INVESTMENT COMPANY

                  The Company and its Subsidiaries shall be prohibited from
being required to register as an "investment company" (as that term is defined
in the Investment Company Act of 1940, as amended (the "Investment Company
Act")), or from otherwise becoming subject to regulation under the Investment
Company Act.

SECTION 4.19      MAINTENANCE OF PROPERTIES AND INSURANCE

                  The Company and the Guarantors shall cause all material
properties used or useful to the conduct of their business and the business of
each of their Subsidiaries to be maintained and kept in good condition, repair
and working order (reasonable wear and tear excepted) and supplied with all
necessary equipment and shall cause to be made all necessary repairs, renewals,
replacements, betterments and improvements thereof, all as in their reasonable
judgment may be necessary, so that the business carried on in connection
therewith may be properly conducted at all times; provided, however, that
nothing in this Section 4.19 shall prevent the Company or any Guarantor from
discontinuing any operation or maintenance of any of such properties, or
disposing of any of them, if such discontinuance or disposal is (a) (i) in the
judgment of the Board of Directors of the Company, desirable in the conduct of
the business of such entity and (ii) would not have a material adverse effect on
the ability of the Company and the Guarantors to satisfy their obligations under
the Notes, the Guarantees and this Indenture, or, to the extent applicable, (b)
as otherwise permitted under Section 4.13 hereof.

                  The Company and Guarantors shall maintain, or cause to be
maintained, for themselves and each of their Subsidiaries, insurance (including
appropriate self-insurance) against loss or damage of the kinds that, in the
reasonable, good faith opinion of the Board of Directors of the Company is
adequate and appropriate for the conduct of the business of the Company, the
Guarantors and such Subsidiaries.

SECTION 4.20      CORPORATE EXISTENCE

                  Subject to Article V hereof, the Company shall do or cause to
be done all things necessary to preserve and keep in full force and effect (i)
its corporate existence, and the corporate, partnership or other existence of
each of its Subsidiaries, in accordance with the

                                       62
<PAGE>
respective organizational documents (as the same may be amended from time to
time) of the Company or any such Subsidiary and (ii) the rights (charter and
statutory), licenses and franchises of the Company and its Subsidiaries;
provided, however, that the Company shall not be required to preserve any such
right, license or franchise, or the corporate, partnership or other existence of
any of its Subsidiaries, if the Board of Directors shall determine that the
preservation thereof is no longer desirable in the conduct of the business of
the Company and its Subsidiaries, taken as a whole, and that the loss thereof
would not have a material adverse effect on the ability of the Company and the
Guarantors to satisfy their obligations under the Notes, the Guarantees and this
Indenture.

                                    ARTICLE V
                                   SUCCESSORS

SECTION 5.1       MERGER, CONSOLIDATION OR SALE OF ASSETS

                  The Company will not consolidate with or merge with or into
another Person or, directly or indirectly, sell, lease, convey or transfer all
or substantially all of its assets (such amounts to be computed on a
consolidated basis), whether in a single transaction or a series of related
transactions, to another Person or group of affiliated Persons unless:

                  (1) either (a) the Company is the continuing entity or (b) the
         resulting, surviving or transferee entity is a corporation organized
         under the laws of the United States, any state thereof or the District
         of Columbia and expressly assumes by supplemental indenture all of the
         Company's Obligations in connection with the Notes, this Indenture and
         the Collateral Agreements;

                  (2) no Default or Event of Default shall exist or shall occur
         immediately after giving effect on a pro forma basis to such
         transaction;

                  (3) unless such transaction is solely the merger of the
         Company and one of the Company's previously existing Wholly Owned
         Subsidiaries which is also a Guarantor for the purpose of
         reincorporation into another jurisdiction and which transaction is not
         for the purpose of evading this provision and not in connection with
         any other transaction, immediately after giving effect to such
         transaction on a pro forma basis, the Consolidated Net Worth of the
         consolidated, resulting, surviving or transferee entity is at least
         equal to the Consolidated Net Worth of the Company immediately prior to
         such transaction;

                  (4) unless such transaction is solely the merger of the
         Company and one of the Company's previously existing Wholly Owned
         Subsidiaries which is also a Guarantor in a transaction which is not
         for the purpose of evading this provision and not in connection with
         any other transaction, immediately after giving effect to such
         transaction on a pro forma basis, the consolidated, resulting,
         surviving or transferee entity would immediately thereafter be
         permitted to incur at least $1.00 of additional Indebtedness pursuant
         to the Debt Incurrence Ratio set forth in Section 4.7 herein; and

                  (5) each Guarantor, shall have, if required by the terms of
         this Indenture or the Collateral Agreements, confirmed in writing that
         its Guarantee shall apply to the

                                       63
<PAGE>
         obligations of the Company or the surviving entity in accordance with
         the Notes, this Indenture and the Collateral Agreements.

SECTION 5.2       SUCCESSOR CORPORATION SUBSTITUTED

                  Upon any consolidation or merger in accordance with Section
5.1 hereof, the successor corporation formed by such consolidation or into which
the Company is merged shall succeed to and (except in the case of a lease or any
transfer of all or substantially all of the Company's assets) be substituted
for, and may exercise every right and power of, the Company under this Indenture
with the same effect as if such successor corporation had been named therein as
the Company, and the Trustee may require any such Person to ensure, by executing
and delivering appropriate instruments and opinions of counsel, that the Trustee
continues to hold a Lien, having the same relative priority as was the case
immediately prior to such transactions, on all Collateral for the benefit of the
Holders.

                  For purposes of the foregoing, the transfer (by lease,
assignment, sale or otherwise) of all or substantially all of the properties and
assets of one or more Subsidiaries, the Company's interest in which constitutes
all or substantially all of the Company's properties and assets shall be deemed
to be the transfer of all or substantially all of the Company's properties and
assets.

                                   ARTICLE VI
                              DEFAULTS AND REMEDIES

SECTION 6.1       EVENTS OF DEFAULT

                  "Event of Default," wherever used herein, means any one of the
following events:

                  (a) the failure of the Company to pay any installment of
interest (or Liquidated Damages, if any) on the Notes as and when the same
becomes due and payable and the continuance of any such failure for 30 days;

                  (b) the failure of the Company to pay all or any part of the
principal, or premium, if any, on the Notes when and as the same becomes due and
payable at maturity, redemption, by acceleration or otherwise, including,
without limitation, payment of the Change of Control Purchase Price or the Asset
Sale Offer Price, on Notes validly tendered and not properly withdrawn pursuant
to a Change of Control Offer or Asset Sale Offer, as applicable;

                  (c) the failure of the Company or the failure by any of the
Guarantors to observe or perform any other covenant or agreement contained in
the Notes or this Indenture and, except for Sections 4.13 and 4.16 and Article V
hereof, which failure continues for a period of 30 days after written notice is
given to the Company by the Trustee or to the Company and the Trustee by the
Holders of at least 25% in aggregate principal amount of the Notes outstanding;

                  (d) a default occurs and is continuing (after giving effect to
any waivers, amendments, applicable grace periods or any extension of any
maturity date) under the Indebtedness of the Company or the Indebtedness of any
the Company's Subsidiaries with an

                                       64
<PAGE>
aggregate amount outstanding in excess of $10,000,000 (i) resulting from the
failure to pay principal of or interest on such Indebtedness; or (ii) if as a
result of such default, the maturity of such Indebtedness has been accelerated
prior to its stated maturity;

                  (e) final nonappealable unsatisfied judgments not covered by
insurance aggregating in excess of $10,000,000, at any one time rendered against
the Company or any of its Subsidiaries and not stayed, bonded or discharged
within 60 days;

                  (f) any Guarantee of a Guarantor ceases to be in full force
and effect or becomes unenforceable or invalid or is declared null and void
(other than in accordance with the terms of the Guarantee and this Indenture) or
any Guarantor denies or disaffirms its Obligations under its Guarantee or the
Collateral Agreements;

                  (g) any failure to comply with any material agreement or
covenant in, or material provision of, any of the Collateral Agreements, or any
breach of a representation under, the Collateral Agreements;

                  (h) any of the Collateral Agreements ceases to be in full
force and effect (except as contemplated in the Indenture or the Collateral
Agreements) or any of the Collateral Agreements ceases to give the Trustee (or,
in the case of a Mortgage, ceases to give the Trustee or any other trustee under
such Mortgage) any of the Liens, rights, powers or privileges purported to be
created thereby with respect to a material portion of the Collateral (except as
contemplated in the Indenture or the Collateral Agreements), or any of the
Collateral Agreements is declared null and void by the Company or a court of
competent jurisdiction (except as contemplated in the Indenture or the
Collateral Agreements), or the Company or any Guarantor denies that it has any
further liability under any Collateral Agreement to which it is a party or gives
notice of such effect (in each case, other than by reason of the termination of
this Indenture or any such Collateral Agreement in accordance with its terms or
the release of any Guarantor in accordance with this Indenture);

                  (i) a court having jurisdiction in the premises enters a
decree or order for (A) relief in respect of the Company or any Significant
Subsidiary in an involuntary case under any applicable Bankruptcy Law now or
hereafter in effect, (B) appointment of a receiver, liquidator, assignee,
custodian, trustee, sequestrator or similar official of the Company or any
Significant Subsidiary or for all or substantially all of the property and
assets of the Company or any Significant Subsidiary or (C) the winding up or
liquidation of the affairs of the Company or any Significant Subsidiary and, in
each case, such decree or order shall remain unstayed and in effect for a period
of 60 consecutive days;

                  (j) the Company or any Significant Subsidiary (A) commences a
voluntary case under any applicable Bankruptcy Law now or hereafter in effect,
or consents to the entry of an order for relief in an involuntary case under any
such law, (B) consents to the appointment of or taking possession by a receiver,
liquidator, assignee, custodian, trustee, sequestrator or similar official of
the Company or any Significant Subsidiary or for all or substantially all of the
property and assets of the Company or any Significant Subsidiary or (C) effects
any general assignment for the benefit of creditors; or

                  (k) failure by the Company or the Guarantors to notify the
Trustee within 3 Business Days following its discovery of any Default.

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                  If a Default occurs and is continuing, the Trustee must,
within 90 days after the occurrence of such Default, give to the Holders notice
of such Default, but the Trustee shall be protected in withholding such notice
if it in good faith determines that the withholding of such notice is in the
interest of the Holders, except in the case of a Default in the payment of the
principal of, premium, if any, or interest on any of the Notes when due or in
the payment of any redemption or repurchase obligation.

SECTION 6.2       ACCELERATION

                  (a) If an Event of Default occurs and is continuing (other
than an Event of Default specified in clause (i) or (j) of Section 6.1 under
this Indenture) subject to the terms of the Intercreditor Agreement, then in
every such case, unless the principal of all of the Notes shall have already
become due and payable, either the Trustee or the Holders of at least 25% in
aggregate principal amount of the Notes then outstanding, by written notice to
the Company (and to the Trustee if such notice is given by the Holders), may,
and the Trustee at the request of such Holders shall, declare the principal of,
premium, if any, and accrued interest (and Liquidated Damages, if any) on the
Notes to be due and payable immediately. Upon a declaration of acceleration,
such principal of, premium, if any, and accrued interest (and Liquidated
Damages, if any) on the Notes shall be immediately due and payable. If an Event
of Default specified in clause (i) or (j) of Section 6.1 occurs, all principal
and accrued interest (and Liquidated Damages, if any) thereon will be
immediately due and payable on all outstanding Notes without any declaration or
other act on the part of the Trustee or the Holders. In the event a declaration
of acceleration because of an Event of Default set forth in clause (d) of
Section 6.1 solely by virtue of a default under the Credit Agreement has
occurred and is continuing, such declaration of acceleration shall be
automatically rescinded and annulled if the event of default triggering such
Event of Default pursuant to clause (d) of Section 6.1 shall be remedied, or
cured or waived by the holders of the relevant Indebtedness, within 60 days
after such event of default, provided that no judgment or decree for the payment
of money due on the Notes has been obtained by the Trustee.

                  (b) Except as provided in Section 6.2(c), at any time after a
declaration of acceleration has been made and before a judgment or decree for
payment of the money due has been obtained by the Trustee as hereinafter
provided in this Article VI, the Holders of not less than a majority in
aggregate principal amount of then outstanding Notes, by written notice to the
Company and the Trustee, may rescind, on behalf of all Holders, any such
declaration of acceleration if:

                  (1) the Company has paid or deposited with the Trustee cash
         sufficient to pay: (a) all overdue interest and Liquidated Damages, if
         any, on all Notes; (b) the principal of (and premium, if any,
         applicable to) any Notes which would become due other than by reason of
         such declaration of acceleration, and interest thereon at the rate
         borne by the Notes; (c) to the extent that payment of such interest is
         lawful, interest upon overdue interest at the rate borne by the Notes;
         and (d) all sums paid or advanced by the Trustee hereunder and the
         reasonable compensation, expenses, disbursements and advances of the
         Trustee and its agents and counsel, and all other amounts due the
         Trustee under Section 7.7 hereof; and

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                  (2) all Events of Default, other than the non-payment of the
         principal of, premium, if any, and interest (and Liquidated Damages, if
         any) on the Notes which have become due solely by such declaration of
         acceleration, have been cured or waived as provided in Section 6.4
         hereof.

                  (c) Notwithstanding clause (b) of this Section 6.2, no waiver
shall be effective against any Holder for any Event of Default or event which
with notice or lapse of time or both would be an Event of Default with respect
to any covenant or provision which cannot be modified or amended without the
consent of the Holder of each outstanding Note affected thereby, unless all such
affected Holders agree, in writing, to waive such Event of Default or other
event. No such waiver shall cure or waive any subsequent default or impair any
right consequent thereon.

SECTION 6.3       OTHER REMEDIES

                  If an Event of Default occurs and is continuing, subject to
the terms of the Intercreditor Agreement, the Trustee may pursue any available
remedy to collect the payment of principal, premium, if any, Liquidated Damages,
if any, and interest on the Notes or to enforce the performance of any provision
of the Notes or this Indenture.

                  The Trustee may maintain a proceeding even if it does not
possess any of the Notes or does not produce any of them in the proceeding. A
delay or omission by the Trustee or any Holder of a Note in exercising any right
or remedy accruing upon an Event of Default shall not impair the right or remedy
or constitute a waiver of or acquiescence in the Event of Default. All remedies
are cumulative to the extent permitted by law.

SECTION 6.4       WAIVER OF PAST DEFAULTS

                  Subject to Section 6.7 hereof, the Holders of a majority in
principal amount of the outstanding Notes by written notice to the Company and
to the Trustee, may, on behalf of all Holders, waive any existing or past
Default or Event of Default hereunder and its consequences under this Indenture,
except a default:

                  (1)      with respect to any provision of this Indenture
                           requiring a supermajority approval to amend, which
                           Default may only be waived by such a supermajority;

                  (2)      in the payment of principal of, premium, if any,
                           Liquidated Damages, if any, or interest on any Note
                           not yet cured as specified in clauses (a) and (b) of
                           Section 6.1 hereof;

                  (3)      in respect of a covenant or provision hereof which,
                           under Article IX, cannot be modified or amended
                           without the consent of the Holder of each outstanding
                           Note affected, unless all such affected Holders
                           agree, in writing, to waive such default; or

                  (4)      the rescission of which would conflict with any
                           judgment or decree of a court of competent
                           jurisdiction.

<PAGE>

                  Upon any such waiver, such default shall cease to exist, and
any Event of Default arising therefrom shall be deemed to have been cured for
every purpose of this Indenture; but no such waiver shall extend to any
subsequent or other default or impair any right arising therefrom.

SECTION 6.5       CONTROL BY MAJORITY

                  Holders of a majority in aggregate principal amount of the
then outstanding Notes may direct the time, method and place of conducting any
proceeding for exercising any remedy available to the Trustee or exercising any
trust or power conferred on it. However, the Trustee may refuse to follow any
direction that conflicts with law or this Indenture, that the Trustee determines
in good faith may be unduly prejudicial to the rights of other Holders of Notes
not joining in the giving of such direction or that may involve the Trustee in
personal liability and the Trustee may take any other action it deems proper
that is not inconsistent with any such direction received from Holders of the
Notes.

SECTION 6.6       LIMITATION ON SUITS

                  A Holder of a Note may pursue a remedy with respect to this
Indenture or the Notes only if:

                  (a) the Holder of a Note gives to the Trustee written notice
of a continuing Event of Default;

                  (b) the Holders of at least 25% in aggregate principal amount
of the then outstanding Notes make a written request to the Trustee to pursue
the remedy;

                  (c) such Holder of a Note or Holders of Notes offer and, if
requested, provide to the Trustee indemnity satisfactory to the Trustee against
any costs, liability or expense;

                  (d) the Trustee does not comply with the request within 60
days after receipt of the request and the offer and, if requested, the provision
of indemnity; and

                  (e) during such 60-day period the Holders of a majority in
principal amount of the then outstanding Notes do not give the Trustee a
direction inconsistent with the request.

A Holder of a Note may not use this Indenture to prejudice the rights of another
Holder of a Note or to obtain a preference or priority over another Holder of a
Note.

SECTION 6.7       RIGHTS OF HOLDERS OF NOTES TO RECEIVE PAYMENT

                  Notwithstanding any other provision of this Indenture and
subject to Article XI, except as permitted by Section 9.2 hereof and the
Intercreditor Agreement, the right of any Holder of a Note to receive payment of
the principal of, premium and Liquidated Damages, if any, and interest on the
Note, on or after the respective due dates expressed in the Note (including in
connection with an offer to purchase) or to bring suit for the enforcement of
any such payment on or after such respective dates, shall not be impaired or
affected without the consent of such Holder.

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SECTION 6.8       COLLECTION SUIT BY TRUSTEE

                  If an Event of Default specified in Section 6.1 hereof occurs
and is continuing, subject to the terms of the Intercreditor Agreement, the
Trustee is authorized to recover judgment in its own name and as trustee of an
express trust against the Company for the whole amount of principal of, premium
and Liquidated Damages, if any, and interest remaining unpaid on the Notes and
interest on overdue principal and, to the extent lawful, interest and such
further amount as shall be sufficient to cover the costs and expenses of
collection, including the reasonable compensation, expenses, disbursements and
advances of the Trustee, its agents and counsel.

SECTION 6.9       TRUSTEE MAY FILE PROOFS OF CLAIM

                  The Trustee is authorized to file such proofs of claim and
other papers or documents as may be necessary or advisable in order to have the
claims of the Trustee (including any claim for the reasonable compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel) and
the Holders of the Notes allowed in any judicial proceedings relative to the
Company (or any other obligor upon the Notes), its creditors or its property and
shall be entitled and empowered to collect, receive and distribute any money or
other property payable or deliverable on any such claims and any custodian in
any such judicial proceeding is hereby authorized by each Holder to make such
payments to the Trustee, and in the event that the Trustee shall consent to the
making of such payments directly to the Holders, to pay to the Trustee any
amount due to it for the reasonable compensation, expenses, disbursements and
advances of the Trustee, its agents and counsel, and any other amounts due the
Trustee under Section 7.7 hereof. To the extent that the payment of any such
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel, and any other amounts due the Trustee under Section 7.7 hereof out
of the estate in any such proceeding, shall be denied for any reason, payment of
the same shall be secured by a Lien on, and shall be paid out of, any and all
distributions, dividends, money, securities and other properties that the
Holders may be entitled to receive in such proceeding whether in liquidation or
under any plan of reorganization or arrangement or otherwise. Nothing herein
contained shall be deemed to authorize the Trustee to authorize or consent to or
accept or adopt on behalf of any Holder any plan of reorganization, arrangement,
adjustment or composition affecting the Notes or the rights of any Holder, or to
authorize the Trustee to vote in respect of the claim of any Holder in any such
proceeding; provided, however that the Trustee may, on behalf of the Holders,
vote for the election of a trustee in bankruptcy or similar official and may be
a member of the creditor's committee.

SECTION 6.10      PRIORITIES

                  Subject to the terms of the Intercreditor Agreement, if the
Trustee collects any money pursuant to this Article, it shall pay out the money
in the following order:

                  First: to the Trustee, its agents and attorneys for amounts
due under Section 7.7 hereof, including payment of all compensation, expense and
liabilities incurred, and all advances made, by the Trustee and the costs and
expenses of collection (including the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel);

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<PAGE>
                  Second: to Holders of Notes for amounts due and unpaid on the
Notes for principal, premium and Liquidated Damages, if any, and interest,
ratably, without preference or priority of any kind, according to the amounts
due and payable on the Notes for principal, premium and Liquidated Damages, if
any, and interest, respectively; and

                  Third: without duplication, to the Holders for any other
Obligations owing to the Holders under the Notes or this Indenture; and

                  Fourth: to the Company or to such party as a court of
competent jurisdiction shall direct.

                  The Trustee may fix a record date and payment date for any
payment to Holders of Notes pursuant to this Section 6.10.

SECTION 6.11      UNDERTAKING FOR COSTS

                  In any suit for the enforcement of any right or remedy under
this Indenture or in any suit against the Trustee for any action taken or
omitted by it as a Trustee, a court in its discretion may require the filing by
any party litigant in the suit of an undertaking to pay the costs of the suit,
and the court in its discretion may assess reasonable costs, including
reasonable attorneys' fees, against any party litigant in the suit, having due
regard to the merits and good faith of the claims or defenses made by the party
litigant. This Section 6.11 does not apply to a suit by the Trustee, a suit by a
Holder of a Note pursuant to Section 6.7 hereof, or a suit by Holders of more
than 10% in principal amount of the then outstanding Notes.

                                   ARTICLE VII

                                     TRUSTEE

SECTION 7.1       DUTIES OF TRUSTEE

                  (a) If an Event of Default of which the Trustee has knowledge
has occurred and is continuing and subject to the terms of the Intercreditor
Agreement, the Trustee shall exercise such of the rights and powers vested in it
by this Indenture, and use the same degree of care and skill in its exercise, as
a prudent man would exercise or use under the circumstances in the conduct of
its own affairs.

                  (b) Except during the continuance of an Event of Default of
which the Trustee has knowledge:

                           (i) the duties of the Trustee shall be determined
solely by the express provisions of this Indenture and the Trustee need perform
only those duties that are specifically set forth in this Indenture and no
others, and no implied covenants or obligations shall be read into this
Indenture against the Trustee; and

                           (ii) in the absence of bad faith on its part, the
Trustee may conclusively rely, as to the truth of the statements and the
correctness of the opinions expressed therein, upon certificates or opinions
furnished to the Trustee and conforming to the requirements of this Indenture.
However, the Trustee shall examine the certificates and opinions to determine
whether or not they conform to the requirements of this Indenture.

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                  (c) The Trustee may not be relieved from liabilities for its
own negligent action, its own negligent failure to act, or its own willful
misconduct, except that:

                           (i) this paragraph (c) does not limit the effect of
paragraph (b) of this Section 7.1;

                           (ii) the Trustee shall not be liable for any error of
judgment made in good faith by an Officer of the Trustee, unless it is proved
that the Trustee was negligent in ascertaining the pertinent facts; and

                           (iii) the Trustee shall not be liable with respect to
any action it takes or omits to take in good faith in accordance with a
direction received by it pursuant to Section 6.5 hereof.

                  (d) Whether or not therein expressly so provided, every
provision of this Indenture that in any way relates to the Trustee is subject to
Sections 7.1 and 7.2 hereof.

                  (e) No provision of this Indenture shall require the Trustee
to expend or risk its own funds or incur any liability. The Trustee shall be
under no obligation to exercise any of its rights and powers under this
Indenture at the request of any Holders, unless such Holder shall have offered
to the Trustee security and indemnity satisfactory to it against any loss,
liability or expense.

                  (f) Upon request from the Company, the Trustee is hereby
authorized to and shall enter into on the Issue Date, the Intercreditor
Agreement in connection with the Credit Agreement.

                  (g) Upon request from the Company, the Trustee is hereby
authorized to and shall (i) enter into new control agreements with respect to
deposit accounts, securities accounts and other investment property as the
Company may request in order to comply with its obligations under Section 4.4(c)
of the Pledge and Security Agreement, and (ii) in connection with the closing of
any deposit accounts or securities accounts by the Company, execute such
terminations and releases of control agreements in respect thereof as the
Company may reasonably request.

                  (h) The Trustee shall not be liable for interest on any money
received by it except as the Trustee may agree in writing with the Company.
Money held in trust by the Trustee need not be segregated from other funds
except to the extent required by law.

                  (i) In connection with any new or replacement Credit Agreement
permitted by clause (f) of the definition of Permitted Indebtedness, the Trustee
is hereby authorized to enter into a new intercreditor agreement or an amendment
to the Intercreditor Agreement consistent with the provisions of Section 9.1(i)
hereof and such other amended, supplemented or replacement Collateral Agreements
contemplated by Section 9.1(i) hereof.

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SECTION 7.2       RIGHTS OF TRUSTEE

                  (a) In connection with the Trustee's rights and duties under
this Indenture, the Trustee may conclusively rely upon any document believed by
it to be genuine and to have been signed or presented by the proper Person. The
Trustee need not investigate any fact or matter stated in the document.

                  (b) Before the Trustee acts or refrains from acting under this
Indenture, it may require an Officers' Certificate or an Opinion of Counsel or
both. The Trustee shall not be liable for any action it takes or omits to take
in good faith in reliance on such Officers' Certificate or Opinion of Counsel.
The Trustee may consult with counsel and the written advice of such counsel or
any Opinion of Counsel shall be full and complete authorization and protection
from liability in respect of any action taken, suffered or omitted by it
hereunder in good faith and in reliance thereon.

                  (c) The Trustee may act through its attorneys and agents and
shall not be responsible for the misconduct or negligence of any agent appointed
with due care.

                  (d) The Trustee shall not be liable for any action it takes or
omits to take in good faith that it believes to be authorized or within the
rights or powers conferred upon it by this Indenture.

                  (e) Unless otherwise specifically provided in this Indenture,
any demand, request, direction or notice from the Company shall be sufficient if
signed by an Officer of the Company.

                  (f) The Trustee shall be under no obligation to exercise any
of the rights or powers vested in it by this Indenture at the request or
direction of any of the Holders unless such Holders shall have offered to the
Trustee reasonable security or indemnity against the costs, expenses and
liabilities that might be incurred by it in compliance with such request or
direction.

                  (g) Except with respect to Section 4.1 hereof, the Trustee
shall have no duty to inquire as to the performance of the Company's covenants
in Article IV hereof. In addition, the Trustee shall not be deemed to have
knowledge of any Default or Event of Default except (i) any Event of Default
occurring pursuant to Sections 6.1(a), 6.1(b) and 4.1 hereof or (ii) any Default
or Event of Default of which the Trustee shall have received written
notification in the manner set forth in this Indenture or an Officer in the
Corporate Trust Office of the Trustee shall have obtained actual knowledge.
Delivery of reports, information and documents to the Trustee under Section 4.3
is for informational purposes only and the Trustee's receipt of the foregoing
shall not constitute constructive notice of any information contained therein or
determinable from information contained therein, including the Company's
compliance with any of their covenants thereunder (as to which the Trustee is
entitled to rely exclusively on an Officer's Certificate).

                  (h) The Trustee shall not be bound to make any investigation
into the facts or matters stated in any resolution, certificate, statement,
instrument, opinion, report, notice, request, direction, consent, order, bond,
debenture, note, other evidence of indebtedness or other

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paper or document, but the Trustee may, in its discretion, make such further
inquiry or investigation into such facts or matters as it may see fit.

SECTION 7.3       INDIVIDUAL RIGHTS OF TRUSTEE

                  The Trustee in its individual or any other capacity may become
the owner or pledgee of Notes and may otherwise deal with the Company or any
Affiliate of the Company with the same rights it would have if it were not
Trustee. However, in the event that the Trustee acquires any conflicting
interest (as defined in the TIA) it must eliminate such conflict within 90 days,
apply to the SEC for permission to continue as trustee or resign. Any Agent may
do the same with like rights and duties. The Trustee is also subject to Sections
7.10 and 7.11 hereof.

SECTION 7.4       TRUSTEE'S DISCLAIMER

                  The Trustee shall not be responsible for and makes no
representation as to the validity or adequacy of this Indenture or the Notes, it
shall not be accountable for the Company's use of the proceeds from the Notes or
any money paid to the Company or upon the Company's direction under any
provision of this Indenture, it shall not be responsible for the use or
application of any money received by any Paying Agent other than the Trustee,
and it shall not be responsible for any statement or recital herein or any
statement in the Notes or any other document in connection with the sale of the
Notes or pursuant to this Indenture other than its certificate of
authentication.

SECTION 7.5       NOTICE OF DEFAULTS

                  If a Default or Event of Default occurs and is continuing and
if it is known to the Trustee, the Trustee shall mail to Holders of Notes a
notice in the manner and to the extent provided by Section 313(c) of the TIA of
the Default or Event of Default within 90 days after it occurs. Except in the
case of a Default or Event of Default in payment of principal of, premium, if
any, Liquidated Damages, if any, or interest on any Note, the Trustee may
withhold the notice if and so long as a committee of its Officers in good faith
determines that withholding the notice is in the interests of the Holders of the
Notes.

SECTION 7.6       REPORTS BY TRUSTEE TO HOLDERS OF THE NOTES

                  Within 60 days after each May 15 beginning with the May 15
following the date of this Indenture, and for so long as Notes remain
outstanding, the Trustee shall mail to the Holders of the Notes a brief report
dated as of such reporting date that complies with TIA Section 313(a) (but if no
event described in TIA Section 313(a) has occurred within the 12 months
preceding the reporting date, no report need be transmitted). The Trustee also
shall comply with TIA Section 313(b)(2). The Trustee shall also transmit by mail
all reports as required by TIA Section 313(c).

                  A copy of each report at the time of its mailing to the
Holders of Notes shall be mailed to the Company and filed with the SEC and each
stock exchange on which the Notes are listed in accordance with TIA Section
313(d). The Company shall promptly notify the Trustee when the Notes are listed
on any stock exchange.

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SECTION 7.7       COMPENSATION AND INDEMNITY

                  The Company shall pay to the Trustee from time to time
reasonable compensation for its acceptance of this Indenture and services
hereunder. The Trustee's compensation shall not be limited by any law on
compensation of a trustee of an express trust. The Company shall reimburse the
Trustee promptly upon request for all reasonable disbursements, advances and
expenses incurred or made by it in addition to the compensation for its
services. Such expenses shall include the reasonable compensation, disbursements
and expenses of the Trustee's agents and counsel.

                  The Company shall indemnify the Trustee against any and all
losses, liabilities or expenses (including reasonable attorneys' fees) incurred
by it arising out of or in connection with the acceptance or administration of
its duties under this Indenture, including the costs and expenses of enforcing
this Indenture against the Company (including this Section 7.7) and defending
itself against any claim (whether asserted by the Company or any Holder or any
other Person) or liability in connection with the exercise or performance of any
of its powers or duties hereunder, except to the extent any such loss, liability
or expense may be attributable to its negligence, bad faith or willful
misconduct. The Trustee shall notify the Company promptly of any claim for which
it may seek indemnity. Failure by the Trustee to so notify the Company shall not
relieve the Company of its obligations hereunder, except to the extent the
Company has been prejudiced thereby. The Company shall defend the claim and the
Trustee shall cooperate in the defense. In the event of a conflict of interest
between the Company and the Trustee, the Trustee may have separate counsel and
the Company shall pay the reasonable fees and expenses of such counsel. The
Company need not pay for any settlement made without its consent, which consent
shall not be unreasonably withheld.

                  The obligations of the Company under this Section 7.7 shall
survive the satisfaction and discharge of this Indenture.

                  To secure the Company's payment obligations in this Section
7.7, the Trustee shall have a Lien prior to the Notes on all money or property
held or collected by the Trustee, except that held in trust to pay principal and
interest on particular Notes. Such Lien shall survive the satisfaction and
discharge of this Indenture.

                  When the Trustee incurs expenses or renders services after an
Event of Default specified in Sections 6.1(i) or 6.1(j) hereof occurs, the
expenses and the compensation for the services (including the fees and expenses
of its agents and counsel) are intended to constitute expenses of administration
under any Bankruptcy Law.

                  The Trustee shall comply with the provisions of TIA Section
313(b)(2) to the extent applicable.

SECTION 7.8       REPLACEMENT OF TRUSTEE

                  A resignation or removal of the Trustee and appointment of a
successor Trustee shall become effective only upon the successor Trustee's
acceptance of appointment as provided in this Section 7.8.

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                  The Trustee may resign in writing at any time and be
discharged from the trust hereby created by so notifying the Company. The
Holders of Notes of a majority in principal amount of the then outstanding Notes
may remove the Trustee by so notifying the Trustee and the Company in writing.
The Company may remove the Trustee if:

                  (a) the Trustee fails to comply with Section 7.10 hereof;

                  (b) the Trustee is adjudged a bankrupt or an insolvent or an
order for relief is entered with respect to the Trustee under any Bankruptcy
Law;

                  (c) a custodian or public officer takes charge of the Trustee
or its property; or

                  (d) the Trustee becomes incapable of acting.

                  If the Trustee resigns or is removed or if a vacancy exists in
the office of Trustee for any reason, the Company shall promptly appoint a
successor Trustee. Within one year after the successor Trustee takes office, the
Holders of a majority in principal amount of the then outstanding Notes may
appoint a successor Trustee to replace the successor Trustee appointed by the
Company.

                  If a successor Trustee does not take office within 60 days
after the retiring Trustee resigns or is removed, the retiring Trustee, the
Company, or the Holders of Notes of at least 10% in principal amount of the then
outstanding Notes may petition any court of competent jurisdiction for the
appointment of a successor Trustee.

                  If the Trustee, after written request by any Holder of a Note
who has been a Holder of a Note for at least six months, fails to comply with
Section 7.10 hereof, such Holder of a Note may petition any court of competent
jurisdiction for the removal of the Trustee and the appointment of a successor
Trustee.

                  A successor Trustee shall deliver a written acceptance of its
appointment to the retiring Trustee and to the Company. Thereupon, the
resignation or removal of the retiring Trustee shall become effective, and the
successor Trustee shall have all the rights, powers and duties of the Trustee
under this Indenture. The successor Trustee shall mail a notice of its
succession to Holders of the Notes. The retiring Trustee shall promptly transfer
all property held by it as Trustee to the successor Trustee; provided all sums
owing to the Trustee hereunder have been paid and subject to the Lien provided
for in Section 7.7 hereof. Notwithstanding replacement of the Trustee pursuant
to this Section 7.8, the Company's obligations under Section 7.7 hereof shall
continue for the benefit of the retiring Trustee.

SECTION 7.9       SUCCESSOR TRUSTEE BY MERGER, ETC.

                  If the Trustee consolidates, merges or converts into, or
transfers all or substantially all of its corporate trust business to, another
corporation, the successor corporation without any further act shall be the
successor Trustee.

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SECTION 7.10      ELIGIBILITY; DISQUALIFICATION

                  There shall at all times be a Trustee hereunder that is a
corporation or trust company (or a member of a bank holding company) organized
and doing business under the laws of the United States of America or of any
state thereof that is authorized under such laws to exercise corporate trustee
power, that is subject to supervision or examination by federal or state
authorities and that has (or the bank holding company of which it is a member
has) a combined capital and surplus of at least $50,000,000 as set forth in its
most recent published annual report of condition.

                  This Indenture shall always have a Trustee who satisfies the
requirements of TIA Section 310(a)(1), (2) and (5). The Trustee is subject to
TIA Section 310(b).

SECTION 7.11      PREFERENTIAL COLLECTION OF CLAIMS AGAINST COMPANY

                  The Trustee is subject to TIA Section 311(a), excluding any
creditor relationship listed in TIA Section 311(b). A Trustee who has resigned
or been removed shall be subject to TIA Section 311(a) to the extent indicated
therein.

                                  ARTICLE VIII

                    LEGAL DEFEASANCE AND COVENANT DEFEASANCE

SECTION 8.1       OPTION TO EFFECT LEGAL DEFEASANCE OR COVENANT DEFEASANCE

                  The Company may, at the option of its Board of Directors
evidenced by a resolution set forth in an Officers' Certificate, elect to have
either Section 8.2 or 8.3 hereof be applied to all outstanding Notes upon
compliance with the conditions set forth below in this Article VIII.

SECTION 8.2       LEGAL DEFEASANCE AND DISCHARGE

                  Upon the Company's exercise under Section 8.1 hereof of the
option applicable to this Section 8.2, each of the Company and the Guarantors,
as applicable, shall, subject to the satisfaction of the applicable conditions
set forth in Section 8.4 hereof, be deemed to have been discharged from its
obligations with respect to all outstanding Notes and Guarantees, as applicable,
on and after the date the conditions set forth below are satisfied (hereinafter,
"Legal Defeasance"). For this purpose, Legal Defeasance means that the Company
shall be deemed to have paid and discharged all amounts owed under the
outstanding Notes and the Guarantors shall be deemed to have paid and discharged
the entire Indebtedness represented by the outstanding Guarantees, which shall
thereafter be deemed to be "outstanding" only for the purposes of Section 8.5
hereof and the other Sections of this Indenture referred to in (a) and (b)
below, and to have satisfied all its other obligations under such Notes, such
Guarantees and this Indenture (and the Trustee, on demand of and at the expense
of the Company, shall execute proper instruments acknowledging the same), except
for the following provisions which shall survive until otherwise terminated or
discharged hereunder: (a) the rights of Holders of outstanding Notes to receive
solely from the trust fund described in Section 8.4 hereof, and as more fully
set forth in Section 8.4, payments in respect of the principal of, premium, if
any, and interest and Liquidated Damages, if any, on such Notes when such
payments are due, (b) the Company's obligations with respect to such Notes under
Article II and Section 4.2 hereof,

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(c) the rights, powers, trusts, duties and immunities of the Trustee hereunder
and the Company's obligations in connection therewith and (d) this Article VIII.
Subject to compliance with this Article VIII, the Company may exercise its
option under this Section 8.2 notwithstanding the prior exercise of its option
under Section 8.3 hereof. Upon Legal Defeasance, the Collateral shall be
released in accordance with Section 10.4 hereof and the Trustee shall promptly
execute and deliver to the Company any documents reasonably requested by the
Company to effectuate the foregoing.

SECTION 8.3       COVENANT DEFEASANCE

                  Upon the Company's exercise under Section 8.1 hereof of the
option applicable to this Section 8.3, subject to the satisfaction of the
applicable conditions set forth in Section 8.4 hereof, the Company and the
Guarantors shall be released from their respective obligations under Sections
4.3, 4.4, 4.5, 4.7, 4.8, 4.9, 4.10, 4.11, 4.12, 4.13, 4.14, 4.15, 4.16, 4.17,
4.19, 5.1(3) and 5.1(4) hereof and Articles X and XI hereof on and after the
date the conditions set forth below are satisfied (hereinafter, "Covenant
Defeasance"), and the Notes and the Guarantees shall thereafter be deemed not
"outstanding" for the purposes of any direction, waiver, consent or declaration
or act of Holders (and the consequences of any thereof) in connection with such
covenants, but shall continue to be deemed "outstanding" for all other purposes
hereunder (it being understood that such Notes shall not be deemed outstanding
for accounting purposes). For this purpose, Covenant Defeasance means that, with
respect to the outstanding Notes, the Company and the Guarantors may omit to
comply with and shall have no liability in respect of any term, condition or
limitation set forth in any such covenant, whether directly or indirectly, by
reason of any reference elsewhere herein to any such covenant or by reason of
any reference in any such covenant to any other provision herein or in any other
document and such omission to comply shall not constitute a Default or an Event
of Default under Section 6.1 hereof, but, except as specified above, the
remainder of this Indenture and such Notes shall be unaffected thereby. In
addition, upon the Company's exercise under Section 8.1 hereof of the option
applicable to this Section 8.3, subject to the satisfaction of the applicable
conditions set forth in Section 8.4 hereof, (x) Sections 6.1(c) through 6.1(h)
hereof and Section 6.1(k) hereof shall not constitute Events of Default to the
extent such events occur thereafter and (y) Sections 6.1(i) and 6.1(j) hereof
shall not constitute an Event of Default to the extent they occur after the 91st
day following the occurrence of the Company's exercise of Covenant Defeasance;
provided, however that for all other purposes as set forth herein, such Covenant
Defeasance provisions shall be effective. Upon Covenant Defeasance, the
Collateral shall be released in accordance with Section 10.4 hereof and the
Trustee shall promptly execute and deliver to the Company any documents
reasonably requested by the Company to effectuate the foregoing.

SECTION 8.4       CONDITIONS TO LEGAL OR COVENANT DEFEASANCE

                  The following shall be the conditions to the application of
either Section 8.2 or 8.3 hereof to the outstanding Notes:

                  In order to exercise either Legal Defeasance or Covenant
Defeasance:

                  (a) the Company must irrevocably deposit with the Trustee, in
trust, for the benefit of the Holders, United States legal tender, U.S.
Government Obligations, or a combination thereof, in amounts that will be
sufficient, in the opinion of a nationally recognized

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firm of independent public accountants, to pay the principal of, premium, if
any, and Liquidated Damages, if any, and interest on the outstanding Notes on
the stated date for payment thereof or on the applicable redemption date, as the
case may be, and the Trustee must have, for the benefit of Holders of the Notes,
a valid, perfected exclusive security interest in such trust;

                  (b) in the case of an election under Section 8.2 hereof, the
Company must deliver to the Trustee an Opinion of Counsel reasonably acceptable
to the Trustee from United States legal counsel confirming that (A) the Company
has received from, or there has been published by, the Internal Revenue Service
a ruling or (B) since the date of this Indenture, there has been a change in the
applicable federal income tax law, in either case to the effect that, the
Holders of the outstanding Notes will not recognize income, gain or loss for
federal income tax purposes as a result of such Legal Defeasance and will be
subject to federal income tax on the same amounts, in the same manner and at the
same times as would have been the case if such Legal Defeasance had not
occurred;

                  (c) in the case of an election under Section 8.3 hereof, the
Company must deliver to the Trustee an Opinion of Counsel reasonably acceptable
to the Trustee from United States legal counsel confirming that Holders of the
outstanding Notes will not recognize income, gain or loss for federal income tax
purposes as a result of such Covenant Defeasance and will be subject to federal
income tax on the same amounts, in the same manner and at the same times as
would have been the case if such Covenant Defeasance had not occurred;

                  (d) in the case of an election under Section 8.2 or 8.3
hereof, (x) no Default or Event of Default shall have occurred and be continuing
on the date of the deposit, and (y) no Event of Default specified in Section
6.1(i) or (j) hereof shall have occurred at any time from the date of the
deposit to the 91st calendar day thereafter (it being understood that this
condition to Legal Defeasance or Covenant Defeasance may not be satisfied until
such 91st calendar day after the date of deposit);

                  (e) the Defeasance may not result in a breach or violation of,
or constitute a default under, this Indenture or any other material agreement or
instrument to which the Company or any of its Subsidiaries is a party or by
which the Company or any of its Subsidiaries is bound;

                  (f) the Company must deliver to the Trustee an Officers'
Certificate stating that the deposit was not made by the Company with the intent
to hinder, delay or defraud any other of the Company's creditors;

                  (g) the Company shall have delivered to the Trustee an Opinion
of Counsel to the effect that after the 91st day following the deposit, the
trust funds (except as to trust funds that would be payable to holders of Notes
who are "Insiders" as that term is defined by the Bankruptcy Code) will not be
subject to Section 547 of the Bankruptcy Code; and

                  (h) the Company must deliver to the Trustee an Officers'
Certificate confirming the satisfaction of the conditions in clauses (a) through
(g) above, and an Opinion of Counsel, confirming the satisfaction of the
conditions in clauses (a) (with respect to the validity and perfection of the
security interest), (b), (c) and (e).

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                  Legal Defeasance and Covenant Defeasance shall be deemed to
occur on the date all of the applicable conditions set forth in this Section 8.4
are satisfied.

SECTION 8.5       DEPOSITED MONEY AND GOVERNMENT SECURITIES TO BE HELD IN TRUST;
                  OTHER MISCELLANEOUS PROVISIONS

                  Subject to Section 8.6 hereof, all money and U.S. Government
Obligations (including the proceeds thereof) deposited with the Trustee (or
other qualifying trustee, collectively for purposes of this Section 8.5, the
"Trustee") pursuant to Section 8.4 hereof in respect of the outstanding Notes
shall be held in trust and applied by the Trustee, in accordance with the
provisions of such Notes and this Indenture, to the payment, either directly or
through any Paying Agent (including the Company acting as Paying Agent) as the
Trustee may determine, to the Holders of such Notes of all sums due and to
become due thereon in respect of principal, premium, if any, and interest (and
Liquidated Damages, if any), but such money need not be segregated from other
funds except to the extent required by law.

                  The Company shall pay and indemnify the Trustee against any
tax, fee or other charge imposed on or assessed against the cash or U.S.
Government Obligations deposited pursuant to Section 8.4 hereof or the principal
and interest received in respect thereof, other than any such tax, fee or other
charge which by law is for the account of the Holders of the outstanding Notes.

                  Anything in this Article VIII to the contrary notwithstanding,
the Trustee shall deliver or pay to the Company from time to time upon the
request of the Company any money or U.S. Government Obligations held by it as
provided in Section 8.4 hereof which, in the opinion of a firm of independent
public accountants nationally recognized in the United States expressed in a
written certification thereof delivered to the Trustee (which may be the opinion
delivered under Section 8.4(a) hereof), are in excess of the amount thereof that
would then be required to be deposited to effect an equivalent Legal Defeasance
or Covenant Defeasance.

SECTION 8.6       REPAYMENT TO COMPANY

                  Any money deposited with the Trustee or any Paying Agent, or
then held by the Company, in trust for the payment of the principal of, premium,
if any, Liquidated Damages, if any, or interest on any Note and remaining
unclaimed for two years after such principal, and premium, if any, Liquidated
Damages, if any, or interest has become due and payable shall be paid to the
Company on its written request or (if then held by the Company) shall be
discharged from such trust; and the Holder of such Note shall thereafter, as a
creditor, look only to the Company for payment thereof, and all liability of the
Trustee or such Paying Agent with respect to such trust money, and all liability
of the Company as trustee thereof, shall thereupon cease; provided, however,
that the Trustee or such Paying Agent, before being required to make any such
repayment, may at the expense of the Company cause to be published once, in the
New York Times and The Wall Street Journal (national edition), notice that such
money remains unclaimed and that, after a date specified therein, which shall
not be less than 30 days from the date of such notification or publication, any
unclaimed balance of such money then remaining will be repaid to the Company.

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SECTION 8.7       REINSTATEMENT

                  If the Trustee or Paying Agent is unable to apply any United
States legal tender or U.S. Government Obligations in accordance with Section
8.2 or 8.3 hereof, as the case may be, by reason of any order directing the
repayment of the deposited money to the Company or otherwise making the deposit
unavailable to make payments under the Notes when due, or if any court enters an
order avoiding the deposit of money with the Trustee or Paying Agent or
otherwise requires the payment of the money so deposited to the Company or to a
fund for the benefit of its creditors, then (so long as the insufficiency exists
or the order remains in effect) the Company's and the Guarantors' obligations
under this Indenture and the Notes shall be revived and reinstated as though no
deposit had occurred pursuant to Section 8.2 or 8.3 hereof until such time as
the Trustee or Paying Agent is permitted to apply all such money in accordance
with Section 8.2 or 8.3 hereof, as the case may be; provided, however, that, if
the Company makes any payment of principal of, premium, if any, Liquidated
Damages, if any, or interest on any Note following the reinstatement of its
obligations, the Company shall be subrogated to the rights of the Holders of
such Notes to receive such payment from the money held by the Trustee or Paying
Agent.

                                   ARTICLE IX

                        AMENDMENT, SUPPLEMENT AND WAIVER

SECTION 9.1       WITHOUT CONSENT OF HOLDERS OF NOTES

                  Notwithstanding Section 9.2 hereof, the Company, the
Guarantors and the Trustee may amend or supplement this Indenture, the Notes or
any Guarantee or amend supplement, terminate or replace the Collateral
Agreements, in each case without the consent of any Holder of a Note:

                  (a)      to cure any ambiguity, defect or inconsistency;

                  (b) to provide for uncertificated Notes in addition to or in
place of certificated Notes or to alter the provisions of Article II hereof in a
manner that does not adversely affect any Holder;

                  (c) to provide for the assumption of the Company's obligations
to the Holders of the Notes in the case of a merger or consolidation pursuant to
Article V hereof;

                  (d) to provide for additional Guarantors as set forth in
Section 4.17 hereof or for the release or assumption of a Guarantee in
compliance with this Indenture;

                  (e) to make any change that would provide any additional
rights or benefits to the Holders of the Notes or that does not adversely affect
the rights hereunder or under the Collateral Agreements of any Holder of the
Notes;

                  (f) to comply with the provisions of the Depositary, Euroclear
or Clearstream or the Trustee with respect to the provisions of this Indenture
or the Notes relating to transfers and exchanges of Notes or beneficial
interests therein;

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                  (g) to comply with requirements of the SEC in order to effect
or maintain the qualification of this Indenture under the TIA;

                  (h) to evidence and provide for the acceptance of appointment
hereunder by a successor Trustee with respect to the Notes;

                  (i) to evidence and provide for a new or replacement lender
under a Credit Agreement so long as such amended, supplemented or replacement
Collateral Agreements do not, as a whole, adversely affect the second priority
Lien in favor of the Trustee or the rights of the Holders under the Collateral
Agreements or under the Indenture;

                  (j) to terminate and release control agreements in respect of
deposit accounts and securities accounts in connection with the closing of any
deposit accounts or securities accounts by the Company; or

                  (k) to add or release Collateral in compliance with the terms
of the Indenture and the Collateral Agreements.

                  Upon the request of the Company accompanied by a resolution of
its Board of Directors authorizing the execution of any such amended or
supplemental Indenture, Notes or Guarantees or amended, supplemented or
replacement Collateral Agreements (or terminations of Collateral Agreements),
and upon receipt by the Trustee of the documents described in Section 9.6
hereof, the Trustee shall join with the Company in the execution of any amended
or supplemental Indenture, Notes or Guarantees or amended, supplemented or
replacement Collateral Agreements (or terminations of Collateral Agreements)
authorized or permitted by the terms of this Indenture and to make any further
appropriate agreements and stipulations that may be therein contained, but the
Trustee shall not be obligated to enter into such agreements that adversely
affects its own rights, duties or immunities under this Indenture or otherwise.

SECTION 9.2       WITH CONSENT OF HOLDERS OF NOTES

                  Except as expressly stated otherwise in this Section 9.2, and
subject to Sections 6.4 and 6.7 hereof, the Company, the Guarantors and the
Trustee may amend or supplement this Indenture, the Notes and the Guarantees,
with the consent of the Holders of a majority in aggregate principal amount of
the Notes then outstanding (including, without limitation, consents obtained in
connection with a purchase of, or tender offer or exchange offer for, the
Notes), and, subject to Sections 6.4 and 6.7 hereof, any existing Default or
Event of Default (other than a Default or Event of Default in the payment of the
principal of, premium, if any, or interest on the Notes, except a payment
default resulting from an acceleration that has been rescinded) or compliance
with any provision of this Indenture, the Notes or the Guarantees may be waived
with the consent of the Holders of a majority in aggregate principal amount of
the then outstanding Notes (including consents obtained in connection with a
purchase of, or tender offer or exchange offer for, the Notes).

                  Notwithstanding the foregoing, other than as provided in
Section 9.1, without the consent of the Holders of not less than two-thirds in
aggregate principal amount of the Notes at the time outstanding, the Company,
the Guarantors and the Trustee may not amend or supplement the Collateral
Agreements, or waive or modify the rights of the Holders thereunder. If the
Company or a Guarantor is required to amend or supplement a Collateral Agreement

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pursuant to the terms of such Collateral Agreement, such amendment or supplement
shall not require the consent of any Holders.

                  The Company, the Guarantors and the Trustee may not amend or
waive any provision of this Indenture or the Notes, without the consent of each
Holder adversely affected thereby, to:

                  (a)(i) change the Stated Maturity on any Note, or reduce the
principal amount thereof or the rate (or extend the time for payment) of
interest thereon or any premium payable upon the redemption thereof at the
option of the Company, or change the city of payment where, or the coin or
currency in which, any Note or any premium or the interest thereon is payable,
or impair the right to institute suit for the enforcement of any such payment on
or after the Stated Maturity thereof (or, in the case of redemption at the
option of the Company, on or after the Redemption Date), or (ii) reduce the
Change of Control Purchase Price or the Asset Sale Offer Price after the
corresponding Asset Sale or Change of Control has occurred or (iii) alter the
provisions regarding the Company's right to redeem the Notes, in a manner
adverse to the Holders; or

                  (b) reduce the percentage in principal amount of the
outstanding Notes, the consent of whose Holders is required for any such
amendment, supplemental indenture or waiver provided for in this Indenture; or

                  (c) modify any of the waiver provisions, except to increase
any required percentage or to provide that certain other provisions of this
Indenture cannot be modified or waived without the consent of the Holder of each
outstanding Note affected thereby; or

                  (d) cause the Notes or any Guarantee to become contractually
subordinate in right of payment to any other Indebtedness other than the Senior
Indebtedness permitted to be incurred pursuant to Section 4.7, as in effect from
time to time; or

                  (e) make any changes in the foregoing clauses (a) through (d)
or this clause (e) hereof, in a manner adverse to the Holders of the Notes.

                  Except as expressly stated otherwise in paragraph (a)(ii)
above, Sections 4.13 and 4.16 hereof may be amended, waived or modified in
accordance with the first paragraph of this Section 9.2, without the consent of
each Holder affected.

                  In connection with any amendment, supplement or waiver under
this Article IX, the Company may, but shall not be obligated to, offer to any
Holder who consents to such amendment, supplement or waiver, or to all Holders,
consideration for such Holder's consent to such amendment, supplement or waiver.

                  Upon the request of the Company accompanied by a resolution of
its Board of Directors authorizing the execution of any such amended or
supplemental Indenture, and upon the filing with the Trustee of evidence
satisfactory to the Trustee of the consent of the Holders of Notes as aforesaid,
and upon receipt by the Trustee of the documents described in Section 9.6
hereof, the Trustee shall join with the Company in the execution of such amended
or supplemental Indenture unless such amended or supplemental Indenture
adversely affects the Trustee's own rights, duties or immunities under this
Indenture or otherwise, in which case the

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Trustee may in its discretion, but shall not be obligated to, enter into such
amended or supplemental Indenture.

                  It shall not be necessary for the consent of the Holders of
Notes under this Section 9.2 to approve the particular form of any proposed
amendment or waiver, but it shall be sufficient if such consent approves the
substance thereof.

                  After an amendment, supplement or waiver under this Section
9.2 becomes effective, the Company shall mail to the Holders of Notes affected
thereby a notice briefly describing the amendment, supplement or waiver. Any
failure of the Company to mail such notice, or any defect therein, shall not,
however, in any way impair or affect the validity of any such amended or
supplemental Indenture or waiver.

SECTION 9.3       COMPLIANCE WITH TRUST INDENTURE ACT

                  Every amendment or supplement to this Indenture or the Notes
shall be set forth in an amended or supplemental Indenture that complies with
the TIA as then in effect.

SECTION 9.4       REVOCATION AND EFFECT OF CONSENTS

                  Until an amendment, supplement or waiver becomes effective (as
determined by the Company and which may be prior to any such amendment,
supplement or waiver becoming operative), a consent to it by a Holder of a Note
is a continuing consent by the Holder of a Note and every subsequent Holder of a
Note or portion of a Note that evidences the same Indebtedness as the consenting
Holder's Note, even if notation of the consent is not made on any Note. However,
any such Holder of a Note or subsequent Holder of a Note may revoke the consent
as to its Note if the Trustee receives written notice of revocation before the
date the waiver, supplement or amendment becomes effective (as determined by the
Company and which may be prior to any such amendment, supplement or waiver
becoming operative).

                  The Company may, but shall not be obligated to, fix a record
date for the purpose of determining the Holders entitled to consent to any
amendment, supplement or waiver, which record date shall be the date so fixed by
the Company notwithstanding the provisions of the TIA. If a record date is
fixed, then notwithstanding the last sentence of the immediately preceding
paragraph, those Persons who were Holders at such record date, and only those
Persons (or their duly designated proxies), shall be entitled to revoke any
consent previously given, whether or not such Persons continue to be Holders
after such record date.

                  After an amendment, supplement or waiver becomes effective, it
shall bind every Holder unless it makes a change described in any of clauses (a)
through (e) of Section 9.2 hereof, in which case, the amendment, supplement or
waiver shall bind only each Holder of a Note who has consented to it and every
subsequent Holder of a Note or portion of a Note that evidences the same debt as
the consenting Holder's Note; provided, that any such waiver shall not impair or
affect the right of any Holder to receive payment of principal and premium of
and interest (and Liquidated Damages, if any) on a Note, on or after the
respective dates set for such amounts to become due and payable expressed in
such Note, or to bring suit for the enforcement of any such payment on or after
such respective dates.

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SECTION 9.5       NOTATION ON OR EXCHANGE OF NOTES

                  The Trustee may place an appropriate notation about an
amendment, supplement or waiver on any Note thereafter authenticated. The
Company in exchange for all Notes may issue and the Trustee shall authenticate
new Notes that reflect the amendment, supplement or waiver.

                  Failure to make the appropriate notation or issue a new Note
shall not affect the validity and effect of such amendment, supplement or
waiver.

SECTION 9.6       TRUSTEE TO SIGN AMENDMENTS, ETC.

                  The Trustee shall sign any amended or supplemental Indenture
authorized pursuant to this Article IX if the amendment or supplement does not
adversely affect the rights, duties, liabilities or immunities of the Trustee.
The Company may not sign an amended or supplemental Indenture until the Board of
Directors approves it. In executing any amended or supplemental Indenture, the
Trustee shall be entitled to receive indemnity reasonably satisfactory to it and
to receive and (subject to Section 7.1 hereof) shall be fully protected in
relying upon, an Officers' Certificate and an Opinion of Counsel stating that
the execution of such amended or supplemental Indenture is authorized or
permitted by this Indenture.

                                    ARTICLE X
                      COLLATERAL AND SECURITY AND GUARANTY

SECTION 10.1  COLLATERAL AGREEMENTS; SECURITY INTERESTS.

                  (a) The due and punctual payment of the principal and premium,
if any, of, and interest on, the Notes when and as the same shall be due and
payable, whether on an Interest Payment Date, at maturity, by acceleration,
repurchase, redemption or otherwise, interest on the overdue principal of and
interest (to the extent permitted by law), if any, on the Notes and performance
of all other Obligations under this Indenture, the Notes, the Collateral
Agreements and the Note Registration Rights Agreement, shall be secured as
provided in the Collateral Agreements.

                  (b) After the Issue Date, the Company shall, and shall cause
each of its Subsidiaries party to the Collateral Agreements to, use reasonable
best efforts (which will be deemed not to include any obligation to pay money to
any third parties other than filing fees, reasonable fees and expenses of the
third party or other de minimus payments) to grant a perfected security interest
in the Collateral, including Collateral acquired after the Issue Date, but in
any event excluding the Excluded Assets; provided, however, that neither the
Company nor any such Subsidiary shall be required to take any actions with
respect to the perfection of security interests unless required under the Pledge
and Security Agreement.

                  (c) Notwithstanding any provision in this Indenture or the
Collateral Agreements to the contrary, in the event that the Company or any of
its Subsidiaries party to the Collateral Agreements grants a Lien on any of the
Company's or any of such Subsidiary's assets in connection with the Credit
Agreement, the Company will be required to, and will be required to cause such
Subsidiaries to, secure the Notes with a Lien on such assets (other than
Excluded

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Assets) that is subordinated to such Lien, except in circumstances where the
Trustee cannot perfect such a Lien by means of a Lien filing.

                  (d) Except as set forth in Section 10.1(b) and 10.1(c), the
Company shall, and shall cause each of its Subsidiaries party to the Collateral
Agreements to, do or cause to be done all such acts and things as may be
required by the provisions of the Collateral Agreements, to assure and confirm
to the Trustee the security interest in the Collateral contemplated hereby and
by the Collateral Agreements, as from time to time constituted, so as to render
the same available for the security and benefit of this Indenture and of the
Notes secured hereby, according to the intent and purposes herein and therein
expressed, including (1) using all commercially reasonable efforts (without
obligation to make monetary payments to landlords other than filing fees,
reasonable fees and expenses of such landlord or other de minimis payments) to
obtain customary consents and waivers from landlords of premises where any
material portion of the Collateral is located (it being understood that such
waivers shall not be required for any premises for which landlord waivers were
not obtained in connection with the Credit Agreement), and (2) using all
commercially reasonable efforts to grant a perfected Lien subordinated to the
Credit Agreement on all real property owned by the Company and its Subsidiaries
party to the Collateral Agreements and to provide customary title insurance for
the benefit of the Trustee with respect thereto, including, without limitation,
commercially reasonable efforts to cause the removal of record of all existing
monetary encumbrances such that the Collateral Agreements shall constitute a
Lien on all such real property subordinated only to the Lien of the Credit
Agreement and Permitted Liens; provided, that if the lenders under the Credit
Agreement do not require the Company to grant or perfect a Lien on such real
property to secure the obligations under the Credit Agreement, then the Company
shall not be required to grant or perfect a Lien on such real property to secure
the Obligations under the Notes and the Indenture. The Company shall, and shall
cause each of its Subsidiaries party to the Collateral Agreements to, take, upon
request of the Trustee, any and all actions required under the Collateral
Agreements to create and maintain, as security for the Obligations under this
Indenture, the Notes, the Collateral Agreements and the Note Registration Rights
Agreement, valid and enforceable, perfected (except as expressly provided herein
or therein) Liens in and on all the Collateral, in favor of the Trustee,
superior to and prior to the rights of all third Persons (other than holders of
Permitted Liens).

                  (e) The Company represents and warrants and covenants that it
(or its Subsidiaries) has executed and delivered, filed and recorded and/or will
execute and deliver, file and record, all instruments and documents, and has
done or will do or cause to be done all such acts and other things as are
required by the Collateral Agreements to subject the Collateral to the Lien of
the Collateral Agreements. Except as expressly provided in this Indenture or the
Collateral Agreements, the Company (or its Subsidiaries party to the Collateral
Agreements) shall execute and deliver, file and record all instruments and do
all acts and other things, in each case as may be required by the Collateral
Agreements to perfect, maintain and protect the security interests created by
the Collateral Agreements and shall pay all filing, recording, mortgage or other
taxes or fees incidental thereto.

                  (f) The security interests in the Collateral created by the
Collateral Agreements as now or hereafter in effect shall be held by the Trustee
for the equal and ratable benefit and security of the Notes without preference,
priority or distinction of any thereof over any other by reason, or difference
in time, of issuance, sale or otherwise, and for the

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enforcement of the payment of principal of, premium, if any, and interest on the
Notes in accordance with their terms.

                  (g) Each Holder of Notes, by its acceptance thereof, consents
and agrees to the terms of the Collateral Agreements and the Intercreditor
Agreement (including, without limitation, the provisions providing for
foreclosure and release of the Collateral) as the same may be in effect or may
be amended from time to time in accordance with their terms or pursuant to this
Indenture and authorizes and directs the Collateral Agent to enter into the
Collateral Agreements and to perform its obligations and exercise its rights
thereunder in accordance therewith. The Company initially appoints the Trustee
as Collateral Agent and/or Trustee under the Collateral Agreements. Any
successor Trustee will act as Collateral Agent and/or Trustee under the
Collateral Agreements or appoint another Person to act in such capacity.

SECTION 10.2      FURTHER ASSURANCES AND SECURITY.

                  The Company represents and warrants that at the time the
Collateral Agreements and this Indenture are executed, the Company (or its
Subsidiaries party to the Collateral Agreements) (a) will have full right, power
and lawful authority to grant, bargain, sell, release, convey, hypothecate,
assign, mortgage, pledge, transfer and confirm, absolutely, the Collateral, in
the manner and form done, or intended to be done, in the Collateral Agreements,
free and clear of all Liens, except for Permitted Liens, and will forever
warrant and defend the title to the same against the claims of all Persons
whatsoever; (b) except as expressly provided herein or in the Collateral
Agreements, will execute, acknowledge and deliver to the Trustee, at the
Company's expense, at any time and from time to time such further assignments,
transfer, assurances or other instruments as may, in the reasonable opinion of
the Trustee, be required to effectuate the terms of this Indenture or the
Collateral Agreements; and (c) except as expressly provided herein or in the
Collateral Agreements, will at any time and from time to time do or cause to be
done all such acts and things as may be necessary or proper, or as may be
reasonably required by the Trustee, to assure and confirm to the Trustee the
security interest in the Collateral contemplated hereby and by the Collateral
Agreements.

SECTION 10.3  OPINIONS.

                  (a) The Company shall furnish to the Trustee promptly after
execution and delivery of this Indenture an Opinion of Counsel (who may be
counsel for the Company) stating that in the opinion of such counsel the
Collateral Agreements have been properly recorded or filed so as to make
effective and perfect the security interest intended to be made effective and
perfected thereby and reciting the details of such action, subject to customary
assumptions and exclusions.

                  (b) The Company shall furnish to the Trustee within three
months after each anniversary of the Issue Date, an Opinion of Counsel, dated as
of such date, stating either that (i) in the opinion of such counsel, all action
has been taken with respect to the recording, registering, filing, re-recording,
re-registering and refiling of all supplemental indentures, financing
statements, continuation statements or other instruments of further assurance as
is necessary to maintain the perfection of the Liens which are the subject of
subsection (a) above and reciting the details of such action, subject to
customary assumptions and exclusions or (ii) in the opinion of such Counsel, no
such action is necessary to maintain the perfection of such

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Liens, which Opinion of Counsel also shall state what actions it then believes
are necessary to maintain the effectiveness and perfection of such Liens during
the next year, subject to customary assumptions and exclusions.

SECTION 10.4  POSSESSION, USE AND RELEASE OF COLLATERAL.

                  (a) Subject to and in accordance with the provisions of this
Indenture, the Collateral Agreements and the Intercreditor Agreement, and so
long as no Event of Default shall have occurred and be continuing, the Company
and the Guarantors shall have the right to remain in possession and retain
exclusive control of the Collateral (other than as set forth in the Collateral
Agreements and this Indenture), to operate the Collateral, to alter or repair
the Collateral and to collect, invest and dispose of any income thereon.

                  (b) Subject to compliance with the Collateral Agreements and
Section 10.5 (if required), the Collateral indicated below, without further
action on the part of the Company or the Trustee, shall be released from the
Liens created by the Collateral Agreements in the following circumstances:

                           (i) all Collateral upon payment in full of the Notes
                  and all other Obligations under this Indenture, the Notes, the
                  Collateral Agreements and the Note Registration Rights
                  Agreement then due and owing, including pursuant to the
                  redemption of all outstanding Notes or the repurchase by the
                  Company and cancellation of all of the outstanding Notes,

                           (ii) upon a sale or other disposition of Collateral
                  pursuant to an Asset Sale made in accordance with Section 4.13
                  hereof; and provided further that only the Collateral subject
                  to such Asset Sale shall be released,

                           (iii) Collateral that is sold, transferred or
                  otherwise disposed of in accordance with this Indenture,

                           (iv) all or any portion of the Collateral upon the
                  written consent of the holders not less than two-thirds of the
                  aggregate principal amount of the then outstanding Notes
                  (including consents obtained in connection with a tender offer
                  or exchange offer for Notes),

                           (v) all Collateral upon Legal Defeasance or Covenant
                  Defeasance herein,

                           (vi) upon release of a Guarantor in accordance with
                  Section 10.11 hereof; the Collateral owned by such Guarantor
                  shall be released; or

                           (vii) as required pursuant to the terms of the
                  Intercreditor Agreement.

                  (c) The Trustee shall provide a written release of any Lien on
any Collateral if it shall have received an Officers' Certificate certifying
that all conditions precedent hereunder have been met and, in the event of a
Covenant Defeasance or Legal Defeasance, such other documents required by
Section 8.4 hereof. Upon compliance with the foregoing sentence and Section 10.5
(if required), the Trustee shall execute, deliver or acknowledge any necessary

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or proper instruments of termination, satisfaction or release to evidence the
release of any Collateral permitted to be released pursuant to this Indenture or
the Collateral Agreements.

                  (d) The release of any Collateral from the terms of the
Collateral Agreements shall not be deemed to impair the security under this
Indenture and of the Liens in favor of the Collateral Agent on the remaining
Collateral in contravention of the provisions hereof and of the Collateral
Agreements if and to the extent such released Collateral is released pursuant to
the terms of this Indenture and the Collateral Agreements.

SECTION 10.5 CERTIFICATES OF THE COMPANY.

                  The Company and the Guarantors shall furnish to the Trustee,
prior to each proposed release of Collateral, all documents required by TIA
Section 314(d); provided, however, that the Company and any Guarantor may,
without providing such documents, sell or otherwise dispose of inventory and
collect or dispose of accounts receivable, notes receivable and cash in the
ordinary course of business if the Company or such Guarantor, as applicable,
delivers to the Trustee semi-annually an Officers' Certificate stating that the
sale, collection and/or disposition of all inventory, accounts receivable, notes
receivable and cash during the immediately preceding six-month period was in the
ordinary course of business and not prohibited by the Indenture. The Trustee
may, to the extent permitted by Sections 7.1 and 7.2 hereof, accept as
conclusive evidence of compliance with the foregoing provisions the appropriate
statements contained in such instruments. Any certificate or opinion required by
TIA Section 314(d) may be made by an Officer of the Company or the applicable
Guarantor, except in cases where TIA Section 314(d) requires that such
certificate or opinion be made by an independent engineer, appraiser or other
expert within the meaning of TIA Section 314(d).

SECTION 10.6      AUTHORIZATION OF ACTIONS TO BE TAKEN BY THE TRUSTEE UNDER THE
                  COLLATERAL AGREEMENTS.

                  Subject to the terms of the Intercreditor Agreement, the
Trustee may, in its sole discretion and without the consent of the Holders, on
behalf of the Holders, take all actions it deems necessary or appropriate in
order to (a) enforce any of the terms of the Collateral Agreements and (b)
collect and receive any and all amounts payable in respect of the Obligations of
the Company and the Guarantors hereunder and under the Notes, the Collateral
Agreements and the Note Registration Rights Agreement. Subject to the terms of
the Intercreditor Agreement or as otherwise expressly provided in the Collateral
Agreements, the Trustee shall have the power to institute and to maintain such
suits and proceedings as it may deem expedient to prevent any impairment of the
Collateral by any acts that may be unlawful or in violation of the Collateral
Agreements or this Indenture, and such suits and proceedings as the Trustee may
deem expedient to preserve or protect its interest and the interests of the
Holders in the Collateral (including power to institute and maintain suits or
proceedings to restrain the enforcement of or compliance with any legislative or
other governmental enactment, rule or order that may be unconstitutional or
otherwise invalid if the enforcement of, or compliance with, such enactment,
rule or order would impair the security interest hereunder or be prejudicial to
the interests of the Holders or the Trustee).

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SECTION 10.7      AUTHORIZATION OF RECEIPT OF FUNDS BY THE TRUSTEE UNDER THE
                  COLLATERAL AGREEMENTS.

                  The Trustee is authorized to receive any funds for the benefit
of the Holders distributed under the Collateral Agreements, and to make further
distributions of such funds to the Holders according to the provisions of this
Indenture, the Collateral Agreements and the Intercreditor Agreement.

SECTION 10.8      GUARANTEES

                  By its execution hereof, each of the Guarantors acknowledges
and agrees that it receives substantial benefits from the Company and that such
party is providing its Guarantee for good and valuable consideration, including,
without limitation, such substantial benefits and services. Accordingly, subject
to the provisions of this Article X, each Guarantor, jointly and severally,
hereby unconditionally guarantees on a senior subordinated basis to each Holder
of a Note authenticated and delivered by the Trustee and its successors and
assigns that: (i) the principal of, premium, if any, and interest and Liquidated
Damages, if any, on the Notes shall be duly and punctually paid in full when
due, whether at maturity, by acceleration, call for redemption, upon a Change of
Control Offer, an Asset Sale Offer, or otherwise, and interest on overdue
principal, premium, if any, Liquidated Damages, if any, and (to the extent
permitted by law) interest on any interest, if any, on the Notes and all other
obligations of the Company to the Holders or the Trustee under the Notes, this
Indenture, the Collateral Agreements and the Note Registration Rights Agreement
(including fees, expenses or other) shall be promptly paid in full or performed,
all in accordance with the terms hereof; and (ii) in case of any extension of
time of payment or renewal of any Notes or any of such other obligations under
the Notes, the Collateral Agreements or the Note Registration Rights Agreement,
the same shall be promptly paid in full when due or performed in accordance with
the terms of the extension or renewal, whether at stated maturity, by
acceleration, call for redemption, upon a Change of Control, an Asset Sale
Offer, or otherwise, subject, however, in the case of clauses (i) and (ii)
above, to the limitations set forth in Section 10.12 hereof (collectively, the
"Guarantee Obligations").

                  Subject to the provisions of this Article X, each Guarantor
hereby agrees that its Guarantee hereunder shall be unconditional, irrespective
of the validity, regularity or enforceability of the Notes, this Indenture, the
Collateral Agreements, the Note Registration Rights Agreement or the absence of
any action to enforce the same, any releases of the Collateral, the entry of any
judgment against the Company, any action to enforce the same or any other
circumstance which might otherwise constitute a legal or equitable discharge or
defense of a Guarantor. Each Guarantor hereby waives and relinquishes: (a) any
right to require the Trustee, the Holders or the Company (each, a "Benefitted
Party") to proceed against the Company, the Subsidiaries or any other Person or
to proceed against or exhaust any security held by a Benefitted Party at any
time or to pursue any other remedy in any secured party's power before
proceeding against the Guarantors; (b) any defense that may arise by reason of
the incapacity, lack of authority, death or disability of any other Person or
Persons or the failure of a Benefitted Party to file or enforce a claim against
the estate (in administration, bankruptcy or any other proceeding) of any other
Person or Persons; (c) demand, protest and notice of any kind (except as
expressly required by this Indenture), including but not limited to notice of
the existence, creation or incurring of any new or additional Indebtedness or
obligation or of any action or non-action on the part of the Guarantors, the
Company, the Subsidiaries, any

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Benefitted Party, any creditor of the Guarantors, the Company or the
Subsidiaries or on the part of any other Person whomsoever in connection with
any obligations the performance of which are hereby guaranteed; (d) any defense
based upon an election of remedies by a Benefitted Party, including but not
limited to an election to proceed against the Guarantors for reimbursement; (e)
any defense based upon any statute or rule of law which provides that the
obligation of a surety must be neither larger in amount nor in other respects
more burdensome than that of the principal; (f) any defense arising because of a
Benefitted Party's election, in any proceeding instituted under the Bankruptcy
Law, of the application of Section 1111(b)(2) of the Bankruptcy Code; and (g)
any defense based on any borrowing or grant of a security interest under Section
364 of the Bankruptcy Code. The Guarantors hereby covenant that, except as
otherwise provided therein, the Guarantees shall not be discharged except by
payment in full of all Guarantee Obligations, including the principal, premium,
if any, and interest on the Notes and all other costs provided for under this
Indenture or as provided in Article VIII.

                  If any Holder or the Trustee is required by any court or
otherwise to return to either the Company or the Guarantors, or any trustee or
similar official acting in relation to either the Company or the Guarantors, any
amount paid by the Company or the Guarantors to the Trustee or such Holder, the
Guarantees, to the extent theretofore discharged, shall be reinstated in full
force and effect. Each of the Guarantors agrees that it shall not be entitled to
any right of subrogation in relation to the Holders in respect of any Guarantee
Obligations hereby until payment in full of all such obligations guaranteed
hereby. Each Guarantor agrees that, as between it, on the one hand, and the
Holders of Notes and the Trustee, on the other hand, (x) the maturity of the
obligations guaranteed hereby may be accelerated as provided in Article VI
hereof for the purposes hereof, notwithstanding any stay, injunction or other
prohibition preventing such acceleration in respect of the Guarantee
Obligations, and (y) in the event of any acceleration of such obligations as
provided in Article VI hereof, such Guarantee Obligations (whether or not due
and payable) shall forthwith become due and payable by such Guarantor for the
purpose of the Guarantee.

SECTION 10.9      EXECUTION AND DELIVERY OF GUARANTEES

                  To evidence the Guarantees set forth in Section 10.8 hereof,
each of the Guarantors agrees that a notation of the Guarantees substantially in
the form included in Exhibit A hereto shall be endorsed on each Note
authenticated and delivered by the Trustee and that this Indenture shall be
executed on behalf of each of the Guarantors by an Officer of each of the
Guarantors.

                  Each of the Guarantors agree that the Guarantees set forth in
this Article X shall remain in full force and effect and apply to all the Notes
notwithstanding any failure to endorse on each Note a notation of the
Guarantees.

                  If an Officer whose facsimile signature is on a Note or a
notation of Guarantee no longer holds that office at the time the Trustee
authenticates the Note on which the Guarantees are endorsed, the Guarantees
shall be valid nevertheless.

                  The delivery of any Note by the Trustee, after the
authentication thereof hereunder, shall constitute due delivery of the
Guarantees set forth in this Indenture on behalf of the Guarantors.

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SECTION 10.10     GUARANTORS MAY CONSOLIDATE, ETC., ON CERTAIN TERMS

                  (a) Nothing contained in this Indenture or in the Notes shall
prevent any consolidation or merger of any Guarantor with or into each other or
with or into the Company. Upon any such consolidation or merger, the Guarantee
of the Guarantor that does not survive the consolidation or merger shall no
longer be of any force or effect.

                  (b) Except for a merger or consolidation in which a Guarantor
is sold and its Guarantee is released in compliance with the provisions of
Section 10.11 hereof, no Guarantor shall consolidate or merge with or into
(whether or not such Guarantor is the surviving Person) another Person unless,
subject to the provisions of the last sentence if this Section 10.10(b) and the
other provisions of this Indenture, (i) the Person formed by or surviving any
such consolidation or merger (if other than such Guarantor) assumes all the
obligations of such Guarantor pursuant to a supplemental indenture in form
reasonably satisfactory to the Trustee, pursuant to which such Person shall
guarantee, on a senior subordinated basis, all of such Guarantor's obligations
under such Guarantor's Guarantee on the terms set forth in this Indenture, grant
a security interest in and/or pledge the collateral owned by such Person to
secure such Obligations on the terms set forth in the Collateral Agreements, and
deliver to the Trustee an Opinion of Counsel that such guaranty and Collateral
Agreements have been duly authorized, executed and delivered; and (ii)
immediately before and immediately after giving effect to such transaction on a
pro forma basis, no Default or Event of Default shall have occurred or be
continuing. In case of any such consolidation or merger and upon the assumption
by the successor corporation, by supplemental indenture, executed and delivered
to the Trustee and reasonably satisfactory in form to the Trustee, of the
Guarantees endorsed upon the Notes and the due and punctual performance of all
of the covenants and conditions of this Indenture to be performed by such
Guarantor, such successor corporation shall succeed to and be substituted for
such Guarantor with the same effect as if it had been named herein as a
Guarantor. Such successor corporation thereupon may cause to be signed any or
all of the Guarantees to be endorsed upon all of the Notes issuable hereunder
which theretofore shall not have been signed by the Company and delivered to the
Trustee. All the Guarantees so issued shall in all respects have the same legal
rank and benefit under this Indenture as the Guarantees theretofore and
thereafter issued in accordance with the terms of this Indenture as though all
of such Guarantees had been issued at the date of the execution hereof. The
provisions of this Section 10.10(b) shall not apply to the merger of any
Guarantors with and into each other or with or into the Company.

                  (c) The Trustee, subject to the provisions of Section 12.4
hereof, shall be entitled to receive an Officers' Certificate as conclusive
evidence that any such consolidation or merger, and any such assumption of
Guarantee Obligations, comply with the provisions of this Section 10.10. Such
Officers' Certificate shall comply with the provisions of Section 12.5 hereof.

SECTION 10.11     RELEASE OF GUARANTORS

                  Notwithstanding Section 10.10(b) hereof, upon the sale or
disposition (including by merger or stock purchase) of a Guarantor (as an
entirety) to an entity which is not and is not required to become a Guarantor,
the designation of a Subsidiary as an Unrestricted Subsidiary, or the
liquidation or dissolution of a Guarantor, which transaction is otherwise in
compliance with this Indenture (including, without limitation, Section 4.13),
such Guarantor will

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be deemed released from its Obligations under its Guarantee of the Notes and the
Collateral Agreements; provided, however, that any such termination shall occur
only to the extent that all obligations of such Guarantor under all of its
guarantees of, and under all of its pledges of assets or other security
interests which secure, any of the Company's Indebtedness or any Indebtedness of
any other of its Subsidiaries shall also terminate upon such release, sale or
transfer and none of its Equity Interests are pledged for the benefit of any
holder of any of the Company's Indebtedness or any Indebtedness of any of its
Subsidiaries.

                  Upon delivery by the Company to the Trustee of an Officer's
Certificate, to the effect that such sale or other disposition or that such
designation or that such liquidation or dissolution was made by the Company in
accordance with the provisions of this Indenture, the Trustee shall execute any
documents reasonably required in order to evidence the release of any such
Guarantor from its obligations under its Guarantee and any Liens in favor of the
Notes. Except as provided in Section 10.10(a) hereof, any Guarantor not released
from its obligations under its Guarantee shall remain liable for the full amount
of principal of and interest on the Notes and for the other obligations of any
Guarantor under this Indenture as provided in this Article X.

                  Notwithstanding the foregoing provisions of this Article X,
(i) any Guarantor whose Guarantee would otherwise be released pursuant to the
provisions of this Section 10.11 may elect, at its sole discretion, by written
notice to the Trustee, to maintain such Guarantee in effect notwithstanding the
event or events that otherwise would cause the release of such Guarantee (which
election to maintain such Guarantee in effect may be conditional or for a
limited period of time), and (ii) any Subsidiary of the Company which is not a
Guarantor may elect, at its sole discretion, by written notice to the Trustee,
to become a Guarantor (which election may be conditional or for a limited period
of time).

SECTION 10.12     LIMITATION OF GUARANTOR'S LIABILITY; CERTAIN BANKRUPTCY EVENTS

                  (a) Each Guarantor, and by its acceptance hereof each Holder,
hereby confirms that it is the intention of all such parties that the Guarantee
Obligation of such Guarantor pursuant to its Guarantee not constitute a
fraudulent transfer or conveyance for purposes of any Bankruptcy Law, the
Uniform Fraudulent Conveyance Act, the Uniform Fraudulent Transfer Act or any
similar federal or state law. To effectuate the foregoing intention, the Holders
and such Guarantor hereby irrevocably agree that the Guarantee Obligations of
such Guarantor under this Article X shall be limited to the maximum amount as
will, after giving effect to all other contingent and fixed liabilities of such
Guarantor and after giving effect to any collections from or payments made by or
on behalf of any other Guarantor in respect of the Guarantee Obligations of such
other Guarantor under this Article X, result in the Guarantee Obligations of
such Guarantor under the Guarantee of such Guarantor not constituting a
fraudulent transfer or conveyance.

                  (b) Each Guarantor hereby covenants and agrees, to the fullest
extent that it may do so under applicable law, that in the event of the
insolvency, bankruptcy, dissolution, liquidation or reorganization of the
Company, such Guarantor shall not file (or join in any filing of), or otherwise
seek to participate in the filing of, any motion or request seeking to stay or
to prohibit (even temporarily) execution on the Guarantee and hereby waives and
agrees not to take the benefit of any such stay of execution, whether under
Section 362 or 105 of the Bankruptcy Law or otherwise.

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SECTION 10.13     APPLICATION OF CERTAIN TERMS AND PROVISIONS TO THE GUARANTORS

                  (a) For purposes of any provision of this Indenture which
provides for the delivery by any Guarantor of an Officers' Certificate and/or an
Opinion of Counsel, the definitions of such terms in Section 1.1 hereof shall
apply to such Guarantor as if references therein to the Company were references
to such Guarantor.

                  (b) Any request, direction, order or demand which by any
provision of this Indenture is to be made by any Guarantor, shall be sufficient
if evidenced as described in Section 12.2 hereof as if references therein to the
Company were references to such Guarantor.

                  (c) Any notice or demand which by any provision of this
Indenture is required or permitted to be given or served by the Trustee or by
the holders of Notes to or on any Guarantor may be given or served as described
in Section 12.2 hereof as if references therein to the Company were references
to such Guarantor.

                  (d) Upon any demand, request or application by any Guarantor
to the Trustee to take any action under this Indenture, such Guarantor shall
furnish to the Trustee such certificates and opinions as are required in Section
12.4 hereof as if all references therein to the Company were references to such
Guarantor.

SECTION 10.14     SUBORDINATION OF GUARANTEES

                  The obligations of each Guarantor under its Guarantee pursuant
to this Article X is subordinated in right of payment to the prior payment in
full in cash of all Senior Indebtedness of such Guarantor on the same basis as
the Notes are subordinated to Senior Indebtedness of the Company. For the
purposes of the foregoing sentence, the Trustee and the Holders shall have the
right to receive and/or retain payments by any of the Guarantors only at such
times as they may receive and/or retain payments in respect of Notes pursuant to
this Indenture, including as set forth in Article XI hereof. In the event that
the Trustee or the Holders receive any payment from a Guarantor at a time when
such payment is prohibited by the foregoing sentence, such payment shall be held
in trust for the benefit of, and immediately paid over and delivered to, the
holders of the Senior Indebtedness of such Guarantor remaining unpaid, to the
extent necessary to pay in full in cash all such Senior Indebtedness.

                                   ARTICLE XI
                                  SUBORDINATION

SECTION 11.1      NOTES SUBORDINATED TO SENIOR INDEBTEDNESS

                  The Company and the Guarantors, and each Holder by its
acceptance of Notes, agree that (a) the payment of the principal of, premium, if
any, and interest (and Liquidated Damages, if any) on the Notes and (b) any
other payment in respect of the Notes, including on account of the acquisition
or redemption of the Notes, by the Company and the Guarantors (including,
without limitation, pursuant to Sections 4.13 and 4.16) is subordinated, to the
extent and in the manner provided in this Article XI, to the prior payment in
full in cash of all Senior

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Indebtedness of the Company and the Senior Indebtedness of the Guarantors, as
applicable, and that these subordination provisions are for the benefit of the
holders of Senior Indebtedness.

                  This Article XI is made for the benefit of the holders of
Senior Indebtedness and any one or more of them may enforce such provisions.

SECTION 11.2      NO PAYMENT ON NOTES IN CERTAIN CIRCUMSTANCES

                  (1) The Company may not, and each Guarantor may not, make
         payment (by set-off or otherwise), as applicable, on account of any
         Obligation in respect of the Notes, including the principal of,
         premium, if any, or interest on the Notes (or Liquidated Damages, if
         any), or on account of the redemption provisions of the Notes
         (including any repurchases of Notes), for cash or property (other than
         Junior Securities): (i) upon the maturity of any of the Company's
         Designated Senior Indebtedness or any Designated Senior Indebtedness of
         such Guarantor by lapse of time, acceleration (unless waived) or
         otherwise, unless and until all principal of, premium, if any, and
         interest on and any other amounts due and owing under such Designated
         Senior Indebtedness are first paid in full in cash or Cash Equivalents
         (or such payment is duly provided for) or otherwise to the extent
         holders accept satisfaction of amounts due by settlement in other than
         cash or Cash Equivalents and the commitments are terminated; or (ii)
         upon an event of default in the payment of any principal of, premium,
         if any, or interest on and other amounts due and owing under the
         Company's Designated Senior Indebtedness or Designated Senior
         Indebtedness of such Guarantor, as applicable, when it becomes due and
         payable, whether at maturity or at a date fixed for prepayment or by
         declaration or otherwise (a "Payment Default"), unless and until such
         Payment Default has been cured or waived or otherwise has ceased to
         exist.

                  (2) Upon (i) the happening of an event of default (other than
         a Payment Default) that permits the holders of Designated Senior
         Indebtedness to declare such Designated Senior Indebtedness to be due
         and payable and (ii) written notice of such non-payment event of
         default given to the Company and the Trustee by the representative
         under the Credit Agreement (a "Payment Notice"), then, unless and until
         such non-payment event of default has been cured or waived or otherwise
         has ceased to exist, no payment (by set-off or otherwise) may be made
         by the Company or on behalf of the Company or by or on behalf of any
         Guarantor which is an obligor under such Designated Senior Indebtedness
         on account of any Obligation in respect of the Notes, including the
         principal of, premium, if any, or interest on the Notes (including any
         repurchases of any of the Notes), or on account of the redemption
         provisions of the Notes (or Liquidated Damages, if any), except for
         payments made with Junior Securities. Notwithstanding the foregoing,
         unless the Designated Senior Indebtedness in respect of which such
         non-payment event of default exists has been declared due and payable
         in its entirety within 180 days after the Payment Notice is delivered
         as set forth above (the "Payment Blockage Period") (and such
         declaration has not been rescinded or waived), at the end of the
         Payment Blockage Period, the Company and the Guarantors shall be
         required to pay all sums not previously paid to the Holders of the
         Notes during the Payment Blockage Period due to the foregoing
         prohibitions and to resume all other payments as and when due on the
         Notes.

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                           Any number of Payment Notices may be given; provided,
         however, that: (i) not more than one Payment Notice shall be given
         within a period of any 360 consecutive days; and (ii) no non-payment
         event of default that existed upon the date of such Payment Notice or
         the commencement of such Payment Blockage Period with respect to any
         issue of Designated Senior Indebtedness shall be made the basis for the
         commencement of any other Payment Blockage Period with respect to such
         issue of Designated Senior Indebtedness (for purposes of this
         provision, any subsequent action, or any subsequent breach of any
         financial covenant for a period commencing after the expiration of such
         Payment Blockage Period that, in either case, would give rise to a new
         non-payment event of default, even though it is an event that would
         also have been a separate breach pursuant to any provision under which
         a prior non-payment event of default previously existed, shall
         constitute a new non-payment event of default for this purpose).

SECTION 11.3      NOTES SUBORDINATED TO PRIOR PAYMENT IN FULL OF ALL SENIOR
                  INDEBTEDNESS ON DISSOLUTION, LIQUIDATION OR REORGANIZATION

                  Upon any distribution of the Company's assets or any
Guarantor's assets upon any dissolution, winding up, total or partial
liquidation or reorganization of the Company or a Guarantor, whether voluntary
or involuntary, judicial or non-judicial, in bankruptcy, insolvency,
receivership, or a similar proceeding or upon assignment for the benefit of
creditors or any marshaling of assets or liabilities or upon any other
liquidation or disposition of such assets:

                  (1) the holders of all of the Company's Senior Indebtedness or
         such Guarantor's Senior Indebtedness, as applicable, shall first be
         entitled to receive payment in full in cash or Cash Equivalents (or
         have such payment duly provided for) or otherwise to the extent holders
         accept satisfaction of amounts due by settlement in other than cash or
         Cash Equivalents before the Holders of the Notes are entitled to
         receive any payment on account of any Obligation in respect of the
         Notes, including the principal of, premium, if any, and interest on the
         Notes (or Liquidated Damages, if any) (other than Junior Securities);
         and

                  (2) any payment or distribution of the Company's assets or
         such Guarantor's assets of any kind or character from any source,
         whether in cash, property or securities (other than Junior Securities)
         to which the Holders of the Notes or the Trustee on behalf of the
         Holders would be entitled (by setoff or otherwise), except for the
         subordination provisions contained in this Indenture, shall be paid by
         the liquidating trustee or agent or other Person making such a payment
         or distribution directly to the holders of such Senior Indebtedness or
         their representative to the extent necessary to make payment in full
         (or have such payment duly provided for) on all such Senior
         Indebtedness remaining unpaid, after giving effect to any concurrent
         payment or distribution to the holders of such Senior Indebtedness.

SECTION 11.4      PAYMENTS OR DISTRIBUTIONS TO BE HELD IN TRUST FOR THE
                  BENEFIT OF HOLDERS OF DESIGNATED SENIOR INDEBTEDNESS.

                  In furtherance of the provisions of Section 11.1, in the event
that, notwithstanding the provisions of Section 11.2 or Section 11.3, any
payment or distribution of the Company's assets or any Guarantor's assets (other
than Junior Securities) shall be received by the Trustee

                                       95
<PAGE>
or the Holders at a time when such payment or distribution is prohibited by
Section 11.2 or Section 11.3, such payment or distribution shall be held in
trust for the benefit of the holders of such Designated Senior Indebtedness or
Senior Indebtedness, as applicable, and shall be paid or delivered by the
Trustee or such Holders, as the case may be, to the holders of such Designated
Senior Indebtedness or Senior Indebtedness, as applicable, remaining unpaid or
unprovided for or to their representative or representatives, or to the trustee
or trustees under any indenture pursuant to which any instruments evidencing any
of such Designated Senior Indebtedness or Senior Indebtedness, as applicable,
may have been issued, ratably according to the aggregate principal amounts
remaining unpaid on account of such Designated Senior Indebtedness or Senior
Indebtedness, as applicable, held or represented by each, for application to the
payment of all such Designated Senior Indebtedness or Senior Indebtedness, as
applicable, remaining unpaid, to the extent necessary to pay or to provide for
the payment of all such Designated Senior Indebtedness or Senior Indebtedness,
as applicable, in full in cash or Cash Equivalents or otherwise to the extent
holders of such Designated Senior Indebtedness or Senior Indebtedness, as
applicable, accept satisfaction of amounts due by settlement in other than cash
or Cash Equivalents after giving effect to any concurrent payment or
distribution to the holders of such Designated Senior Indebtedness or Senior
Indebtedness, as applicable.

SECTION 11.5      HOLDERS TO BE SUBROGATED TO RIGHTS OF HOLDERS OF SENIOR
                  INDEBTEDNESS AND DESIGNATED SENIOR INDEBTEDNESS

                  Subject to the payment in full in cash of all Senior
Indebtedness and Designated Senior Indebtedness of the Company or any Guarantor
as provided herein, the Holders of Notes shall be subrogated to the rights of
the holders of such Senior Indebtedness and Designated Senior Indebtedness to
receive payments or distributions of assets of the Company applicable to the
Senior Indebtedness or Designated Senior Indebtedness until all amounts owing on
the Notes shall be paid in full, and for the purpose of such subrogation no such
payments or distributions to the holders of such Senior Indebtedness and
Designated Senior Indebtedness by or on behalf of the Company or any Guarantor,
or by or on behalf of the Holders by virtue of this Article XI, which otherwise
would have been made to the Holders shall, as between the Company or any
Guarantor and the Holders, be deemed to be payment by the Company or any
Guarantor or on account of such Senior Indebtedness or Designated Senior
Indebtedness, it being understood that the provisions of this Article XI are and
are intended solely for the purpose of defining the relative rights of the
Holders, on the one hand, and the holders of such Senior Indebtedness and
Designated Senior Indebtedness, on the other hand.

SECTION 11.6      RELATIVE RIGHTS

                  This Article XI defines the relative rights of Holders and
holders of Senior Indebtedness and Designated Senior Indebtedness. Subject to
the Intercreditor Agreement, nothing in this Indenture shall: (1) impair, as
between the Company and Holders, the obligation of the Company, which is
absolute and unconditional, to pay principal of and interest on the Notes in
accordance with their terms; (2) affect the relative rights of Holders and
creditors of the Company other than their rights in relation to holders of
Senior Indebtedness and Designated Senior Indebtedness; or (3) prevent the
Trustee or any Holder from exercising its available remedies upon a Default or
Event of Default, subject to the rights of holders and owners of Senior
Indebtedness and Designated Senior Indebtedness to receive distributions and
payments otherwise payable to Holders.

                                       96
<PAGE>
SECTION 11.7      TRUSTEE ENTITLED TO ASSUME PAYMENTS NOT PROHIBITED IN ABSENCE
                  OF NOTICE

                  The Trustee shall not at any time be charged with knowledge of
the existence of any facts which would prohibit the making of any payment to or
by the Trustee unless and until an Officer of the Trustee or any Paying Agent
shall have received, no later than two Business Days prior to such payment
written notice thereof from the Company or from one or more holders of Senior
Indebtedness or Designated Senior Indebtedness, or from any representative
therefor and, prior to the receipt of any such written notice, the Trustee,
subject to the provisions of Sections 7.1 and 7.2, shall be entitled in all
respects conclusively to assume that no such fact exists.

                  Notwithstanding anything to the contrary in this Article XI or
elsewhere in this Indenture or in the Notes, upon any distribution of assets of
the Company and the Guarantors referred to in this Article XI, the Trustee,
subject to the provisions of Sections 7.1 and 7.2, and the Holders shall be
entitled to rely upon any order or decree made by any court of competent
jurisdiction in which such dissolution, winding up, liquidation or
reorganization proceedings are pending, or a certificate of the liquidating
trustee or agent or other Person making any distribution to the Trustee or to
the Holders for the purpose of ascertaining the Persons entitled to participate
in such distribution, the holders of the Senior Indebtedness, Designated Senior
Indebtedness and other Indebtedness of the Company or any Guarantor, the amount
thereof or payable thereon, the amount or amounts paid or distributed thereon
and all other facts pertinent thereto or to this Article XI so long as such
court has been apprised of the provisions of, or the order, decree or
certificate makes reference to, the provisions of this Article XI.

SECTION 11.8      APPLICATION BY TRUSTEE OF ASSETS DEPOSITED WITH IT

                  Amounts deposited in trust with the Trustee pursuant to and in
accordance with Article VIII shall be for the sole benefit of Holders and, to
the extent the making of such deposit by the Company shall (i) not be in
contravention of any term or provision of the Credit Agreement and (ii) be
allocated for the payment of the Notes, shall not be subject to the
subordination provisions of this Article XI. Otherwise, any deposit of assets
with the Trustee or the Paying Agent (whether or not in trust) for the payment
of principal of or interest on any Notes shall be subject to the provisions of
Sections 11.1, 11.2, 11.3, 11.4 and 11.5; provided, that, if prior to two
Business Days preceding the date on which by the terms of this Indenture any
such assets may become distributable for any purpose (including without
limitation, the payment of either principal of or interest on any Note) the
Trustee or such Paying Agent shall not have received with respect to such assets
the written notice provided for in Section 11.7, then the Trustee or such Paying
Agent shall have full power and authority to receive such assets and to apply
the same to the purpose for which they were received, and shall not be affected
by any notice to the contrary which may be received by it on or after such date.

SECTION 11.9      SUBORDINATION RIGHTS NOT IMPAIRED BY ACTS OR OMISSIONS OF THE
                  COMPANY, THE GUARANTORS OR HOLDERS OF SENIOR INDEBTEDNESS AND
                  DESIGNATED SENIOR INDEBTEDNESS

                  No right of any present or future holders of any Senior
Indebtedness or Designated Senior Indebtedness to enforce the subordination
provisions contained in this Article XI shall at any time in any way be
prejudiced or impaired by any act or failure to act on the part

                                       97
<PAGE>
of the Company or any Guarantor or by any act or failure to act, in good faith,
by any such holder, or by any noncompliance by the Company or any Guarantor with
the terms of this Indenture, regardless of any knowledge thereof which any such
holder may have or be otherwise charged with. The holders of Senior Indebtedness
or Designated Senior Indebtedness, as applicable, may extend, renew, modify or
amend the terms of the Senior Indebtedness or Designated Senior Indebtedness, as
applicable, or any security therefor and release, sell or exchange such security
and otherwise deal freely with the Company and the Guarantors, all without
affecting the liabilities and obligations of the parties to this Indenture or
the Holders. The subordination provisions contained in this Indenture are for
the benefit of the holders from time to time of Senior Indebtedness and
Designated Senior Indebtedness and may not be rescinded, cancelled, amended or
modified in any way other than any amendment or modification that is consented
to by each holder of Senior Indebtedness and Designated Senior Indebtedness that
would be adversely affected thereby. The subordination provisions hereof shall
continue to be effective or be reinstated, as the case may be, if at any time
any payment of any of the Senior Indebtedness or Designated Senior Indebtedness
is rescinded or must otherwise be returned by any holder of the Senior
Indebtedness or Designated Senior Indebtedness, as applicable, for any reason,
including, without limitation, upon the insolvency, bankruptcy, or
reorganization of the Company, any Guarantor, or otherwise, all as though such
payment has not been made.

SECTION 11.10     HOLDERS AUTHORIZE TRUSTEE TO EFFECTUATE SUBORDINATION OF
                  NOTES.

                  Each Holder of the Notes by his acceptance thereof authorizes
and expressly directs the Trustee on his behalf to take such action as may be
necessary or appropriate to effectuate the subordination provisions contained in
this Article XI and to protect the rights of the Holders pursuant to this
Indenture, and appoints the Trustee his attorney-in-fact for such purpose,
including, in the event of any dissolution, winding up, liquidation or
reorganization of the Company or any Guarantor (whether in bankruptcy,
insolvency or receivership proceedings or upon an assignment for the benefit of
creditors or any other marshaling of assets and liabilities of the Company or
any Guarantor), the immediate filing of a claim for the unpaid balance of his
Notes in the form required in said proceedings and cause said claim to be
approved. In the event of any liquidation or reorganization of the Company or
any Guarantor in bankruptcy, insolvency, receivership or similar proceeding, if
the Holders of the Notes (or the Trustee on their behalf) have not filed any
claim, proof of claim, or other instrument of similar character necessary to
enforce the obligations of the Company or any Guarantor in respect of the Notes
at least thirty (30) days before the expiration of the time to file the same,
then in such event, but only in such event, the holders of the Senior
Indebtedness, the Designated Senior Indebtedness or a representative on their
behalf may, as an attorney-in-fact for such Holders, file any claim, proof of
claim, or other instrument of similar character on behalf of such Holders.
Nothing herein contained shall be deemed to authorize the Trustee or the holders
of Senior Indebtedness, Designated Senior Indebtedness or their respective
representative to authorize or consent to or accept or adopt on behalf of any
Holder any plan of reorganization, arrangement, adjustment or composition
affecting the Notes or the rights of any Holder thereof, or to authorize the
Trustee or the holders of Senior Indebtedness, Designated Indebtedness or their
respective representative to vote in respect of the claim of any Holder in any
such proceeding.

                                       98
<PAGE>
SECTION 11.11     RIGHT OF TRUSTEE TO HOLD SENIOR INDEBTEDNESS AND DESIGNATED
                  SENIOR INDEBTEDNESS

                  The Trustee shall be entitled to all of the rights set forth
in this Article XI in respect of any Senior Indebtedness and Designated Senior
Indebtedness at any time held by it to the same extent as any other holder of
Senior Indebtedness or Designated Senior Indebtedness, and nothing in this
Indenture shall be construed to deprive the Trustee of any of its rights as such
holder.

                  Nothing in this Article shall apply to claims of, or payments
to, the Trustee under or pursuant to Section 7.7.

SECTION 11.12     ARTICLE XI NOT TO PREVENT EVENTS OF DEFAULT

                  The failure to make a payment on account of principal of,
premium, if any, or interest (or Liquidated Damages, if any) on the Notes by
reason of any provision of this Article XI shall not be construed as preventing
the occurrence of a Default or an Event of Default under Section 6.1 or in any
way limit the rights of the Trustee or any Holder to pursue any other rights or
remedies with respect to the Notes.

SECTION 11.13     NO FIDUCIARY DUTY OF TRUSTEE AND HOLDERS OF SENIOR
                  INDEBTEDNESS AND DESIGNATED SENIOR INDEBTEDNESS OF ONE TO THE
                  OTHER

                  The Trustee and the holders of Senior Indebtedness and
Designated Senior Indebtedness shall not be deemed to owe any fiduciary duty to
each other. Provided, the Trustee has not received any notice as provided in
this Article XI, the Trustee shall not be liable to any such holders if it shall
in good faith mistakenly pay over or distribute to the Holders of Notes or the
Company, any Guarantor or any other Person, cash, property or securities to
which any holders of Senior Indebtedness and Designated Senior Indebtedness
shall be entitled by virtue of this Article XI or otherwise. With respect to
each other, the holders of Senior Indebtedness and Designated Senior
Indebtedness and the Trustee undertake to perform or to observe only such of its
covenants or obligations as are specifically set forth in this Article XI and no
implied covenants or obligations between them shall be read into this Indenture.
Nothing in this Section 11.13 shall affect the obligation of any other such
Person to hold such payment for the benefit of, and to pay such payment over to,
the holders of Senior Indebtedness, Designated Senior Indebtedness or their
respective representative. In the event of any conflict between the fiduciary
duty of the Trustee to the Holders of Notes and to the holders of Senior
Indebtedness or Designated Senior Indebtedness, the Trustee is expressly
authorized to resolve such conflict in favor of the Holders.

                                   ARTICLE XII
                                  MISCELLANEOUS

SECTION 12.1      TRUST INDENTURE ACT CONTROLS

                  If any provision of this Indenture limits, qualifies or
conflicts with any provision of the TIA which is required or deemed to be
included in this Indenture, such required or deemed provision shall control.

                                       99
<PAGE>
SECTION 12.2      NOTICES

                  Any notice or communication by the Company or the Trustee to
the other is duly given if in writing and delivered in Person or mailed by first
class mail (registered or certified, return receipt requested), telecopier or
overnight air courier guaranteeing next day delivery, to the others' address:

If to the Company
or the Guarantors:

                           Orbital Sciences Corporation
                           21839 Atlantic Blvd.
                           Dulles, VA 20166
                           Attention: Legal Department

                           Telecopier No.: (703) 406-5572

with copies (which
shall not constitute
notice) to:
                           Hogan & Hartson L.L.P.
                           555 Thirteenth Street, NW
                           Washington D.C. 20004
                           Attention: Eve N. Howard, Esq.

                           Telecopier No.:  (202) 637-5910

If to the Trustee:
                           U.S. Bank, N.A.
                           180 East 5th Street
                           St. Paul, MN  55101
                           Attention: Corporate Trust Department

                           Telecopier No.:  (651) 244-0711

                  The Company or the Trustee, by notice to the others may
designate additional or different addresses for subsequent notices or
communications.

                  All notices and communications (other than those sent to
Holders) shall be deemed to have been duly given: (i) at the time delivered by
hand, if personally delivered; (ii) when answered back, if telexed; (iii) when
receipt acknowledged, if telecopied; and (iv) the next Business Day after timely
delivery to the courier, if sent by overnight air courier guaranteeing next day
delivery.

                  Any notice or communication to a Holder shall be mailed by
first class mail, certified or registered, return receipt requested, or by
overnight air courier guaranteeing next day delivery to its address shown on the
register kept by the Registrar. Any notice or communication shall also be so
mailed to any Person described in TIA Section 313(c), to the extent required by
the TIA. Failure to mail a notice or communication to a Holder or any defect in
it shall not affect its sufficiency with respect to other Holders.

                                      100
<PAGE>
                  If a notice or communication is mailed in the manner provided
above within the time prescribed, it is duly given, whether or not the addressee
receives it.

                  If the Company mails a notice or communication to Holders, it
shall mail a copy to the Trustee and each Agent at the same time.

SECTION 12.3      COMMUNICATION BY HOLDERS OF NOTES WITH OTHER HOLDERS OF NOTES

                  Holders may communicate pursuant to TIA Section 312(b) with
other Holders with respect to their rights under this Indenture or the Notes.
The Company, the Trustee, the Registrar and anyone else shall have the
protection of TIA Section 312(c).

SECTION 12.4      CERTIFICATE AND OPINION AS TO CONDITIONS PRECEDENT

                  Upon any request or application by the Company to the Trustee
to take any action under this Indenture, the Company shall furnish to the
Trustee:

                  (a) an Officers' Certificate in form and substance reasonably
satisfactory to the Trustee (which shall include the statements set forth in
Section 12.5 hereof) stating that, in the opinion of the signers, all conditions
precedent and covenants, if any, provided for in this Indenture relating to the
proposed action have been satisfied; and

                  (b) an Opinion of Counsel in form and substance reasonably
satisfactory to the Trustee (which shall include the statements set forth in
Section 12.5 hereof) stating that, in the opinion of such counsel, all such
conditions precedent and covenants have been satisfied.

SECTION 12.5      STATEMENTS REQUIRED IN CERTIFICATE OR OPINION

                  Each certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture (other than a certificate
provided pursuant to TIA Section 314(a)(4)) shall comply with the provisions of
TIA Section 314(e) and shall include:

                  (a) a statement that the Person making such certificate or
opinion has read such covenant or condition;

                  (b) a brief statement as to the nature and scope of the
examination or investigation upon which the statements or opinions contained in
such certificate or opinion are based;

                  (c) a statement that, in the opinion of such Person, he or she
has made such examination or investigation as is necessary to enable him to
express an informed opinion as to whether or not such covenant or condition has
been satisfied; and

                  (d) a statement as to whether or not, in the opinion of such
Person, such condition or covenant has been satisfied; provided, however, that
with respect to matters of fact, an Opinion of Counsel may rely on an Officers'
Certificate or certificate of public officials.

                                      101
<PAGE>
SECTION 12.6      RULES BY TRUSTEE AND AGENTS

                  The Trustee may make reasonable rules for action by or at a
meeting of Holders. The Registrar or Paying Agent may make reasonable rules and
set reasonable requirements for its functions.

SECTION 12.7      NO PERSONAL LIABILITY OF DIRECTORS, OFFICERS, EMPLOYEES AND
                  STOCKHOLDERS

                  No past, present or future, direct or indirect, stockholder,
employee, officer, director, agent or representative of the Company, the
Guarantors or any successor entity, as such, shall have any liability for any
Obligations of the Company or the Guarantors under the Notes, the Guarantees or
this Indenture or for any claim based on, in respect of, or by reason of, such
Obligations or their creation, except in their capacity as an obligor or
Guarantor of the Notes in accordance with this Indenture. Each Holder by
accepting a Note waives and releases all such liability. The waiver and release
are part of the consideration for issuance of the Notes.

SECTION 12.8      GOVERNING LAW

                  THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE
USED TO CONSTRUE THIS INDENTURE, THE NOTES AND THE GUARANTEES, INCLUDING,
WITHOUT LIMITATION, SECTIONS 5-1401 AND 5-1402 OF THE NEW YORK GENERAL
OBLIGATIONS LAW AND NEW YORK CIVIL PRACTICE LAWS AND RULES 327(b).

SECTION 12.9      NO ADVERSE INTERPRETATION OF OTHER AGREEMENTS

                  This Indenture may not be used to interpret any other
indenture, loan or debt agreement of the Company or its Subsidiaries or of any
other Person. Any such indenture, loan or debt agreement may not be used to
interpret this Indenture.

SECTION 12.10     SUCCESSORS

                  All agreements of the Company and the Guarantors in this
Indenture and the Notes shall bind their successors. All agreements of the
Trustee in this Indenture shall bind its successors.

SECTION 12.11     SEVERABILITY

                  In case any one or more of the provisions of this Indenture or
in the Notes or in the Guarantees shall be held invalid, illegal or
unenforceable, in any respect for any reason, the validity, legality and
enforceability of any such provision in every other respect and of the remaining
provisions shall not in any way be affected or impaired thereby, it being
intended that all of the provisions hereof shall be enforceable to the full
extent permitted by law.

SECTION 12.12     COUNTERPART ORIGINALS

                  The parties may sign any number of copies of this Indenture.
Each signed copy shall be an original, but all of them together represent the
same agreement.

                                      102
<PAGE>
SECTION 12.13     TABLE OF CONTENTS, HEADINGS, ETC.

                  The Table of Contents and headings of the Articles and
Sections of this Indenture have been inserted for convenience of reference only,
are not to be considered a part of this Indenture and shall in no way modify or
restrict any of the terms or provisions hereof.

                         [Signatures on following page]

                                      103
<PAGE>
                                   SIGNATURES

                  IN WITNESS WHEREOF, the parties hereto have executed this
Indenture as of the date first written above.

                             THE COMPANY:
                             ORBITAL SCIENCES CORPORATION

                             By: /s/ MICHAEL R. WILLIAMS
                                 -----------------------------------------------
                                    Name: Michael R. Williams
                                    Title: Senior Vice President and Treasurer

                             THE GUARANTOR:
                             ORBITAL INTERNATIONAL, INC.

                             By: /s/ MICHAEL R. WILLIAMS
                                 -----------------------------------------------
                                    Name: Michael R. Williams
                                    Title: Vice President and Treasurer

                             THE TRUSTEE:

                             U.S. BANK, N.A.
                             By: /s/ FRANK P. LESLIE
                                 -------------------------
                                    Name: Frank P. Leslie
                                    Title: Vice President
<PAGE>
                                    EXHIBIT A

                                 [FORM OF NOTE]

                          ORBITAL SCIENCES CORPORATION

           12% [SERIES A] [SERIES B](1) SECOND PRIORITY SECURED NOTE
                                    Due 2006
                                                               CUSIP: __________
No.                                                           $_________________

                  Orbital Sciences Corporation, a Delaware corporation
(hereinafter called the "Company" which term includes any successors under the
Indenture hereinafter referred to), for value received, hereby promises to pay
to __________, or registered assigns, the principal sum of __________ Dollars,
on August 15, 2006.

                  Interest Payment Dates: February 15 and August 15, commencing
February 15, 2003.

                  Interest Record Dates: February 1 and August  1

                  Reference is made to the further provisions of this Note on
the reverse side, which will, for all purposes, have the same effect as if set
forth at this place.

                  This Note has been issued with original issue discount for
Federal income tax purposes. Upon request, the Company will promptly make
available to a holder of this Note information regarding the issue price, the
amount of original issue discount, the issue date, and the yield to maturity of
this Note. Holders should contact Orbital Sciences Corporation, 21839 Atlantic
Blvd., Dulles, VA 20166, Attention: Chief Financial Officer.

------------------

(1) Series A should be replaced with Series B in the Exchange Notes.

                                       A-1
<PAGE>
                  IN WITNESS WHEREOF, the Company has caused this instrument to
be duly executed.

                                        ORBITAL SCIENCES CORPORATION,
                                        a Delaware corporation

                                        By:      ___________________________
                                                 Name:
                                                 Title:

                                        By:      ___________________________
                                                 Name:
                                                 Title:

                     TRUSTEE'S CERTIFICATE OF AUTHENTICATION

                  This is one of the Notes described in the within-mentioned
Indenture.

                                        U.S. BANK, N.A.

                                        By:      ____________________________
                                                 Authorized Signatory

Dated: August 22, 2002

                                       A-2
<PAGE>
                                (Reverse of Note)

       12% [Series A] [Series B](2) Second Priority Secured Note due 2006

[THIS GLOBAL NOTE IS HELD BY THE DEPOSITARY (AS DEFINED IN THE INDENTURE
GOVERNING THIS NOTE) OR ITS NOMINEE IN CUSTODY FOR THE BENEFIT OF THE BENEFICIAL
OWNERS HEREOF, AND IS NOT TRANSFERABLE TO ANY PERSON UNDER ANY CIRCUMSTANCES
EXCEPT THAT (I) THE TRUSTEE MAY MAKE SUCH NOTATIONS HEREON AS MAY BE REQUIRED
PURSUANT TO SECTION 2.6 OF THE INDENTURE, (II) THIS GLOBAL NOTE MAY BE EXCHANGED
IN WHOLE BUT NOT IN PART PURSUANT TO SECTION 2.6(a) OF THE INDENTURE, (III) THIS
GLOBAL NOTE MAY BE DELIVERED TO THE TRUSTEE FOR CANCELLATION PURSUANT TO SECTION
2.11 OF THE INDENTURE AND (IV) THIS GLOBAL NOTE MAY BE TRANSFERRED TO A
SUCCESSOR DEPOSITARY WITH THE PRIOR WRITTEN CONSENT OF THE COMPANY.](3)

[UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR NOTES IN DEFINITIVE
FORM, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A
NOMINEE OF THE DEPOSITARY, OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY
OR ANOTHER NOMINEE OF THE DEPOSITARY, OR BY THE DEPOSITARY OR ANY SUCH NOMINEE
TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY. UNLESS THIS
CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST
COMPANY (55 WATER STREET, NEW YORK, NEW YORK) ("DTC"), TO THE COMPANY OR ITS
AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE
ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS MAY BE
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO
CEDE & CO. OR SUCH OTHER ENTITY AS MAY BE REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.](4)

[THE RIGHTS ATTACHING TO THIS REGULATION S TEMPORARY GLOBAL NOTE AND THE
CONDITIONS AND PROCEDURES GOVERNING ITS EXCHANGE FOR DEFINITIVE NOTES, ARE AS
SPECIFIED IN THE INDENTURE (AS DEFINED HEREIN). NEITHER THE HOLDER NOR THE
BENEFICIAL OWNERS OF THIS REGULATION S TEMPORARY GLOBAL NOTE SHALL BE ENTITLED
TO RECEIVE CASH PAYMENTS OF INTEREST DURING THE PERIOD WHICH SUCH HOLDER HOLDS
THIS NOTE.

------------------

(2) Series A should be replaced with Series B in the Exchange Notes.

(3) To be included only on Global Notes deposited with DTC as Depositary.

(4) To be included only on Global Notes deposited with DTC as Depositary.

                                       A-3
<PAGE>
NOTHING IN THIS LEGEND SHALL BE DEEMED TO PREVENT INTEREST FROM ACCRUING ON THIS
NOTE.](5)

[THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS. NEITHER THIS
SECURITY NOR ANY INTEREST OR PARTICIPATION HEREIN MAY BE REOFFERED, SOLD,
ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR OTHERWISE DISPOSED OF IN THE
ABSENCE OF SUCH REGISTRATION OR UNLESS SUCH TRANSACTION IS EXEMPT FROM, OR NOT
SUBJECT TO, REGISTRATION. THE HOLDER OF THIS SECURITY BY ITS ACCEPTANCE HEREOF
AGREES TO OFFER, SELL OR OTHERWISE TRANSFER THIS SECURITY, PRIOR TO THE DATE
WHICH IS TWO YEARS (OR SUCH OTHER PERIOD THAT MAY HEREAFTER BE PROVIDED UNDER
RULE 144(K) UNDER THE SECURITIES ACT AS PERMITTING RESALES OF RESTRICTED
SECURITIES BY NON-AFFILIATES WITHOUT RESTRICTION) AFTER THE LATER OF THE
ORIGINAL ISSUE DATE HEREOF AND THE LAST DATE ON WHICH THE COMPANY OR ANY
AFFILIATE OF THE COMPANY WAS THE OWNER OF THIS SECURITY (OR ANY PREDECESSOR OF
THIS SECURITY) (THE "RESALE RESTRICTION TERMINATION DATE") ONLY (A) TO THE
COMPANY, (B) PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BEEN DECLARED
EFFECTIVE UNDER THE SECURITIES ACT, (C) FOR SO LONG AS THIS SECURITY IS ELIGIBLE
FOR RESALE PURSUANT TO RULE 144A UNDER THE SECURITIES ACT, IN THE UNITED STATES
TO A PERSON IT REASONABLY BELIEVES IS A "QUALIFIED INSTITUTIONAL BUYER" (AS
DEFINED IN RULE 144A UNDER THE SECURITIES ACT) THAT PURCHASES FOR ITS OWN
ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS
GIVEN THAT THE TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A UNDER THE
SECURITIES ACT, (D) TO AN INSTITUTIONAL "ACCREDITED INVESTOR" WITHIN THE MEANING
OF SUBPARAGRAPH (a)(1), (2), (3) OR (7) OF RULE 501 UNDER THE SECURITIES ACT
THAT IS ACQUIRING THIS SECURITY FOR ITS OWN ACCOUNT, OR FOR THE ACCOUNT OF SUCH
AN INSTITUTIONAL "ACCREDITED INVESTOR," FOR INVESTMENT PURPOSES AND NOT WITH A
VIEW TO, OR FOR OFFER OR SALE IN CONNECTION WITH, ANY DISTRIBUTION IN VIOLATION
OF THE SECURITIES ACT, (E) OUTSIDE OF THE UNITED STATES IN AN OFFSHORE
TRANSACTION IN ACCORDANCE WITH RULE 904 UNDER THE SECURITIES ACT OR (F) PURSUANT
TO ANOTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE
SECURITIES ACT, SUBJECT TO THE COMPANY'S AND THE TRUSTEE'S RIGHT PRIOR TO ANY
SUCH OFFER, SALE OR TRANSFER TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL,
CERTIFICATIONS AND/OR OTHER INFORMATION SATISFACTORY TO EACH OF THEM, AND IN
EACH OF THE FOREGOING CASES, A CERTIFICATE OF TRANSFER IN THE FORM APPEARING ON
THIS SECURITY IS COMPLETED AND DELIVERED BY THE TRANSFEROR TO THE TRUSTEE AND IN
EACH CASE IN ACCORDANCE WITH APPLICABLE SECURITIES LAWS OF ANY U.S. STATE OR ANY
OTHER APPLICABLE JURISDICTION. THE HOLDER OF THIS SECURITY AGREES THAT IT WILL
DELIVER TO EACH PERSON TO WHOM THIS SECURITY IS TRANSFERRED A NOTICE
SUBSTANTIALLY TO THE

------------------

(5) To be included only on Reg S Temporary Global Notes.

                                       A-4
<PAGE>
EFFECT OF THIS LEGEND. THIS LEGEND WILL BE REMOVED UPON THE REQUEST OF THE
HOLDER AFTER THE RESALE RESTRICTION TERMINATION DATE.](6)

         Capitalized terms used herein shall have the meanings assigned to them
in the Indenture referred to below unless otherwise indicated.

         1. Interest. Orbital Sciences Corporation, a Delaware corporation (the
"Company"), promises to pay interest on the principal amount of this Note at 12%
per annum from the Issue Date until maturity and shall pay the Liquidated
Damages, if any, payable pursuant to Section 4 of the Note Registration Rights
Agreement referred to below. The Company will pay interest and Liquidated
Damages, if any, semi-annually on February 15 and August 15 of each year, or if
any such day is not a Business Day, on the next succeeding Business Day (each an
"Interest Payment Date"). The first Interest Payment Date shall be February 15,
2003. Interest on the Notes will accrue from the most recent date on which
interest has been paid or, if no interest has been paid, from the Issue Date;
provided that if there is no existing Default in the payment of interest, and if
this Note is authenticated between an Interest Record Date (defined below)
referred to on the face hereof and the next succeeding Interest Payment Date,
interest shall accrue from such next succeeding Interest Payment Date. The
Company shall pay interest (including Accrued Bankruptcy Interest in any
proceeding under any Bankruptcy Law) on overdue principal and premium, if any,
from time to time on demand at the rate then in effect; it shall pay interest
(including Accrued Bankruptcy Interest in any proceeding under any Bankruptcy
Law) on overdue installments of interest and Liquidated Damages, if any,
(without regard to any applicable grace periods) from time to time on demand at
the same rate to the extent lawful. Interest will be computed on the basis of a
360-day year of twelve 30-day months.

         2. Method of Payment. The Company will pay interest on the Notes and
Liquidated Damages, if any, to the Persons who are registered Holders of Notes
at the close of business on the February 1 or August 1 next preceding the
Interest Payment Date (each an "Interest Record Date"), even if such Notes are
cancelled after such Interest Record Date and on or before such Interest Payment
Date, except as provided in Section 2.12 of the Indenture (as defined below)
with respect to defaulted interest. The Notes will be payable as to principal,
premium, if any, and interest (and Liquidated Damages, if any), at the office or
agency of the Company maintained within the City and State of New York for such
purpose, or, at the option of the Company, payment of interest shall be made by
wire transfer to the accounts specified by the Holders or, if no account is
specified, by check mailed to a Holder at its address set forth in the register
of Holders, provided that payment by wire transfer of immediately available
funds to an account within the United States will be required with respect to
principal of, premium, if any and interest (and Liquidated Damages, if any), on
all Global Notes. Such payment shall be in such coin or currency of the United
States of America as at the time of payment is legal tender for payment of
public and private debts.

         3. Paying Agent and Registrar. Initially, U.S. Bank, N.A., the Trustee
under the Indenture, will act as Paying Agent and Registrar. The Company may
change any Paying Agent or Registrar without notice to any Holder. The Company
or any of its Subsidiaries may act in any such capacity.

------------------

(6) To be included only on Transfer Restricted Notes.

                                       A-5
<PAGE>
         4. Indenture. The Company issued the Notes under an Indenture, dated as
of August 22, 2002 ("Indenture"), by and among the Company, the Guarantors party
thereto and the Trustee. The terms of the Notes include those stated in the
Indenture and those made part of the Indenture by reference to the Trust
Indenture Act of 1939, as amended (15 U.S. Code Sections 77aaa-77bbbb).
The Notes are subject to all such terms, and Holders are referred to the
Indenture and such Act for a statement of such terms.

                  The Obligations under the Indenture, the Intercreditor
Agreement, the Notes and the Guarantees thereof are secured by the Collateral
described in the Collateral Agreements, subject to the provisions of the
Indenture and the Collateral Agreements. Holders are referred to the Collateral
Agreements for a statement of such terms.

         5. Optional Redemption.

                  (a) Except as set forth in clause (b) of this Section 5, the
Company shall not have the option to redeem the Notes pursuant to this Section 5
prior to August 15, 2003. The Notes shall be redeemable for cash at the option
of the Company, in whole or in part, at any time on or after August 15, 2003,
upon not less than 30 days nor more than 60 days prior notice mailed by first
class mail to each Holder at its last registered address, at the following
redemption prices (expressed as percentages of the principal amount) if redeemed
during the 12-month period commencing August 15 of the years indicated below, in
each case, together with accrued and unpaid interest (and Liquidated Damages, if
any) thereon, to the date of redemption of the Notes (the "Redemption Date")
(subject to the right of Holders of record on an Interest Record Date to receive
the corresponding interest due (and the corresponding Liquidated Damages, if
any) on the corresponding Interest Payment Date that is on or prior to such
Redemption Date):

<TABLE>
<CAPTION>
                  Year                                       Percentage
                  ----                                       ----------
<S>                                                          <C>
                  2003.........................................104.000%
                  2004.........................................102.000%
                  2005 and thereafter..........................100.000%
</TABLE>

                  (b) Notwithstanding the provisions of clause (a) of this
Section 5, at any time or from time to time prior to August 15, 2003, upon a
Public Equity Offering of the Company's common stock for cash, up to 35% of the
aggregate principal amount of the Notes issued pursuant to this Indenture (only
as necessary to avoid any duplication, excluding any replacement Notes) may be
redeemed at the Company's option within 90 days of the closing of any such
Public Equity Offering, on not less than 30 days, but not more than 60 days,
notice to each Holder of the Notes to be redeemed, with cash received by the
Company from the Net Cash Proceeds of such Public Equity Offering, at a
redemption price equal to 112.00% of the principal amount of the Notes (or
portion thereof) to be redeemed, together with accrued and unpaid interest (and
Liquidated Damages, if any) thereon, to the Redemption Date (subject to the
right of Holders of record on an Interest Record Date to receive the
corresponding interest due (and the corresponding Liquidated Damages, if any) on
the corresponding Interest Payment Date that is on or prior to such Redemption
Date); provided, however, that immediately following such redemption not less
than 65% of the aggregate principal amount of the Notes

                                       A-6
<PAGE>
originally issued pursuant to this Indenture on the Issue Date remain
outstanding (only as necessary to avoid any duplication, excluding any
replacement Notes).

                  (c) Notice of redemption will be mailed by first class mail at
least 30 days but not more than 60 days before the Redemption Date to each
Holder whose Notes are to be redeemed at its registered address. Notes in
denominations larger than $1,000 may be redeemed in part but only in integral
multiples of $1,000, unless all of the Notes held by a Holder are to be
redeemed. On and after the Redemption Date, interest ceases to accrue on Notes
or portions thereof called for redemption unless the Company defaults in the
redemption payment due on the Redemption Date.

         6. Mandatory Redemption. The Company shall not be required to make
mandatory redemption payments with respect to the Notes. The Notes shall not
have the benefit of any sinking fund.

         7. Offers to Purchase.

                  (a) Change of Control. In the event that a Change of Control
has occurred, each Holder of Notes will have the right, at such Holder's option,
pursuant to an offer (subject only to conditions required by applicable law, if
any) by the Company (the "Change of Control Offer"), to require the Company to
repurchase all or any part of such Holder's Notes (provided, that the principal
amount of such Notes must be $1,000 or an integral multiple thereof) on a date
(the "Change of Control Purchase Date") that is no later than 45 Business Days
after the occurrence of such Change of Control, at a cash price equal to the
following purchase prices (expressed as percentages of the principal amount) if
such Change of Control occurs during the 12-month period commencing August 15 of
the years indicated below (the "Change of Control Purchase Price"), in each
case, together with accrued and unpaid interest and Liquidated Damages, if any,
thereon to the Change of Control Purchase Date.

<TABLE>
<CAPTION>
                  Year                                       Percentage
                  ----                                       ----------
<S>                                                          <C>
                  2002.........................               106.000 %
                  2003.........................               104.000 %
                  2004.........................               102.000 %
                  2005 and thereafter..........               100.000 %
</TABLE>

                  The Change of Control Offer shall be made within 25 Business
Days following a Change of Control and shall remain open for at least 20
Business Days following its commencement (the "Change of Control Offer Period").
Upon expiration of the Change of Control Offer Period, the Company promptly
shall purchase all Notes properly tendered in response to the Change of Control
Offer.

                  On or before the Change of Control Purchase Date, the Company
shall: (i) accept for payment Notes or portions thereof properly tendered
pursuant to the Change of Control Offer; (ii) deposit with the Paying Agent cash
sufficient to pay the Change of Control Purchase Price (together with accrued
and unpaid interest and Liquidated Damages, if any) of all Notes so tendered;
and (iii) deliver to the Trustee the Notes so accepted together with an
Officers' Certificate listing the Notes or portions thereof being purchased by
the Company. The

                                       A-7
<PAGE>
Paying Agent promptly will pay the Holders of Notes so accepted an amount equal
to the Change of Control Purchase Price (together with accrued and unpaid
interest and Liquidated Damages, if any) and the Trustee promptly will
authenticate and deliver to such Holders a new Note equal in principal amount to
any unpurchased portion of the Note surrendered. Any Notes not so purchased will
be delivered promptly by the Company to the Holder thereof. The Company publicly
will announce the results of the Change of Control Offer on or as soon as
practicable after the Change of Control Purchase Date.

                  If the Change of Control Purchase Date is on or after an
Interest Record Date and on or before the associated Interest Payment Date, any
accrued and unpaid interest (and Liquidated Damages, if any) due on such
Interest Payment Date will be paid to the Person in whose name a Note is
registered at the close of business on such Interest Record Date.

                  The Company shall not be required to make a Change of Control
Offer upon a Change of Control if a third party makes the Change of Control
Offer in the manner, at the times and otherwise in compliance with the
requirements set forth in this Indenture applicable to a Change of Control made
by the Company and purchases all Notes validly tendered and not withdrawn under
such Change of Control Offer.

                  (b) Asset Sale. Subject to certain exceptions set forth in the
Indenture, the Company and the Guarantors shall not, and shall not permit any of
the Company's Subsidiaries to, in one or a series of related transactions,
convey, sell, transfer, assign or otherwise dispose of, directly or indirectly,
any of their property, business or assets, including by merger or consolidation
(in the case of a Guarantor or a Subsidiary or Unrestricted Subsidiary of the
Company), and including any sale or other transfer or issuance of any Equity
Interests of any of the Company's Subsidiaries or Unrestricted Subsidiaries,
whether by the Company or one of its Subsidiaries or Unrestricted Subsidiaries
or through the issuance, sale or transfer of Equity Interests by one of the
Company's Subsidiaries or Unrestricted Subsidiaries and including any
sale-leaseback transaction (any of the foregoing, an "Asset Sale"), unless, with
respect to any Asset Sale or related series of Asset Sales involving securities,
property or assets with an aggregate fair market value in excess of $5,000,000
(an Asset Sale (including a series of related Asset Sales) of less than
$5,000,000 shall not be subject to this clause (b)), (a) at least 75% of the
total consideration for such Asset Sale or series of related Asset Sales
consists of cash or Cash Equivalents, and (b) the Company's Board of Directors
determines in good faith that the Company will be receiving or such Subsidiary
will be receiving, as applicable, fair market value for such Asset Sale. Solely
for purposes of the preceding sentence, "cash and Cash Equivalents" shall also
include, (i) Purchase Money Indebtedness secured solely by the assets sold and
assumed by a transferee; provided, that the Company and its Subsidiaries are
fully released from obligations in connection therewith, (ii) assets for use in
a Related Business or Equity Interests of a Person that becomes a Guarantor
which is primarily engaged in a Related Business, (iii) Indebtedness incurred
under the Credit Agreement that is assumed by a transferee; provided that the
Company and its Subsidiaries are fully released from obligations in connection
with the amounts assumed and the assumed Indebtedness permanently reduced the
Indebtedness under the Credit Agreement (and in the case of a revolver or
similar arrangement that makes credit available, such commitment is permanently
reduced by such amount), (iv) property that within 30 days of such Asset Sale is
converted into cash or Cash Equivalents; provided, that such cash and Cash
Equivalents shall be treated as Net Cash Proceeds attributable to the original
Asset Sale for which such property was received and (v) TMS Indebtedness;
provided that the

                                       A-8
<PAGE>
Company and its Subsidiaries are fully released from obligations in connection
with the amounts assumed.

                  Within 360 days following such Asset Sale, Net Cash Proceeds
therefrom (the "Asset Sale Amount") shall be: (a) used (i) to retire Purchase
Money Indebtedness secured by the asset which was the subject of the Asset Sale;
or (ii) to retire and permanently reduce Indebtedness incurred under the Credit
Agreement; provided, that in the case of a revolver or similar arrangement that
makes credit available, such commitment is permanently reduced by such amount;
or (b) used to make (i) capital expenditures or (ii) investments in assets and
property (other than notes, bonds, obligations and securities, except in
connection with the acquisition of a Person in a Related Business that becomes a
Guarantor) which in the good faith reasonable judgment of the Company's Board of
Directors will immediately constitute or be a part of a Related Business of the
Company or such Guarantor (if it continues to be a Guarantor) immediately
following such transaction; or the Company shall, within such 360-day period,
enter into a legally binding agreement to apply such Net Cash Proceeds as
described in this clause (b) within six months after such agreement is entered
into and apply such Net Cash Proceeds in accordance with the provisions of this
clause (b); provided, that if such agreement terminates the Company shall have
until the later of (i) 90 days after the date of such termination and (ii) 360
days after the date of the Asset Sale resulting in such Net Cash Proceeds to
effect such application.

                  The accumulated Net Cash Proceeds from Asset Sales and from
any Event of Loss not applied as set forth in the preceding paragraph shall
constitute "Excess Proceeds." Pending the final application of any Net Cash
Proceeds, the Company may temporarily reduce revolving credit borrowings or
otherwise invest or use for general corporate purposes (other than Restricted
Payments that are not solely Restricted Investments) the Net Cash Proceeds in
any manner that is not prohibited by the Indenture. When the Excess Proceeds
equal or exceed $10,000,000, within 10 Business Days the Company shall offer to
repurchase the Notes, together with any other Indebtedness ranking on a parity
with the Notes and with similar provisions requiring the Company to make an
offer to purchase such Indebtedness with the proceeds from such Asset Sale
pursuant to a cash offer (subject only to conditions required by applicable law,
if any), pro rata in proportion to the respective principal amounts of such
Indebtedness (or accreted values in the case of Indebtedness issued with an
original issue discount) and the Notes (the "Asset Sale Offer") at a purchase
price of 100% of the principal amount (or accreted value in the case of
Indebtedness issued with an original issue discount) (the "Asset Sale Offer
Price") together with accrued and unpaid interest and Liquidated Damages, if
any, to the date of payment. The Asset Sale Offer shall remain open for at least
20 Business Days following its commencement (the "Asset Sale Offer Period").
Upon expiration of the Asset Sale Offer Period, the Company shall apply an
amount equal to the Excess Proceeds (the "Asset Sale Offer Amount") plus an
amount equal to accrued and unpaid interest and Liquidated Damages, if any, to
the purchase of all Indebtedness properly tendered in accordance with the
provisions hereof (on a pro rata basis if the Asset Sale Offer Amount is
insufficient to purchase all Indebtedness so tendered) at the Asset Sale Offer
Price (together with accrued and unpaid interest and Liquidated Damages, if any,
to the date of payment). To the extent that the aggregate amount of Notes and
such other pari passu Indebtedness tendered pursuant to an Asset Sale Offer is
less than the Asset Sale Offer Amount, the Company may use any remaining Net
Cash Proceeds as otherwise permitted by the Indenture. Following the
consummation of each Asset Sale Offer, the Excess Proceeds amount shall be reset
to zero.

                                       A-9
<PAGE>
         8. Subordination. The Notes and the Guarantees are subordinated in
right of payment, to the extent and in the manner provided in Section 10.14 and
Article XI of the Indenture, to the prior payment in full in cash of Senior
Indebtedness and Designated Senior Indebtedness. The Company and the Guarantors
agree, and each Holder by accepting a Note consents and agrees, to the
subordination provided in the Indenture and Intercreditor Agreement and
authorizes the Trustee to give it effect.

         9. Denominations, Transfer, Exchange. The Notes are in registered form
without coupons in denominations of $1,000 and integral multiples of $1,000. The
transfer of Notes may be registered and Notes may be exchanged as provided in
the Indenture. The Registrar and the Trustee may require a Holder, among other
things, to furnish appropriate endorsements and transfer documents, and the
Company may require a Holder to pay any taxes and fees required by law or
permitted by the Indenture. The Company need not exchange or register the
transfer of any Note or portion of a Note selected for redemption, except for
the unredeemed portion of any Note being redeemed in part. Also, it need not
exchange or register the transfer of any Notes for a period of 15 days before a
selection of Notes to be redeemed or during the period between an Interest
Record Date and the corresponding Interest Payment Date.

         10. Persons Deemed Owners. The registered Holder of a Note may be
treated as its owner for all purposes.

         11. Amendment, Supplement and Waiver. Subject to certain exceptions,
the Indenture, the Notes or the Guarantees may be amended or supplemented with
the consent of the Holders of a majority in principal amount of the then
outstanding Notes, and any existing Default or compliance with any provision of
the Indenture, the Notes or the Guarantees may be waived with the consent of the
Holders of a majority in principal amount of the then outstanding Notes.
Notwithstanding the foregoing, other than as provided in Section 9.1 of the
Indenture, without the consent of the Holders of not less than two-thirds in
aggregate principal amount of the Notes at the time outstanding, the Company,
the Guarantors and the Trustee may not amend or supplement the Collateral
Agreements, or waive or modify the rights of the Holders thereunder. Without the
consent of any Holder of a Note, the Indenture, the Notes, or the Guarantees may
be amended or supplemented and the Collateral Agreements may be amended,
supplemented, terminated or replaced to cure any ambiguity, defect or
inconsistency; to provide for uncertificated Notes in addition to or in place of
certificated Notes or to alter the provisions of Article II of the Indenture in
a manner that does not adversely affect any Holder; to provide for the
assumption of the Company's obligations to the Holders of the Notes in the case
of a merger or consolidation pursuant to Article V of the Indenture; to provide
for additional Guarantors as set forth in Section 4.17 of the Indenture or for
the release or assumption of a Guarantee in compliance with the Indenture; to
make any change that would provide any additional rights or benefits to the
Holders of the Notes or that does not adversely affect the rights under the
Indenture or under the Collateral Agreements of any Holder of the Notes; to
comply with the provisions of the Depositary, Euroclear or Clearstream or the
Trustee with respect to the provisions of this Indenture or the Notes relating
to transfers and exchanges of Notes or beneficial interests therein; to comply
with requirements of the SEC in order to effect or maintain the qualification of
this Indenture under the TIA; to evidence and provide for the acceptance of
appointment hereunder by a successor Trustee with respect to the Notes; to
evidence and provide for a new or replacement lender under a Credit Agreement so
long as such amended, supplemented or replacement Collateral Agreements do not,
as a whole, adversely

                                      A-10
<PAGE>
affect the second priority Lien in favor of the Trustee or the rights of the
Holders under the Collateral Agreements or under the Indenture; to terminate and
release control agreements in respect of deposit accounts and securities
accounts in connection with the closing of any deposit accounts or securities
accounts by the Company; or to add or release Collateral in compliance with the
terms of the Indenture and the Collateral Agreements.

         12. Defaults and Remedies. The Indenture provides that each of the
following constitutes an Event of Default: (a) the failure of the Company to pay
any installment of interest (or Liquidated Damages, if any) on the Notes as and
when the same becomes due and payable and the continuance of any such failure
for 30 days; (b) the failure of the Company to pay all or any part of the
principal, or premium, if any, on the Notes when and as the same becomes due and
payable at maturity, redemption, by acceleration or otherwise, including,
without limitation, payment of the Change of Control Purchase Price or the Asset
Sale Offer Price, on Notes validly tendered and not properly withdrawn pursuant
to a Change of Control Offer or Asset Sale Offer, as applicable; (c) the failure
of the Company or the failure by any of the Guarantors to observe or perform any
other covenant or agreement contained in the Notes or the Indenture and, except
for Sections 4.13 and 4.16 and Article V thereof, which failure continues for a
period of 30 days after written notice is given to the Company by the Trustee or
to the Company and the Trustee by the Holders of at least 25% in aggregate
principal amount of the Notes outstanding; (d) a default occurs and is
continuing (after giving effect to any waivers, amendments, applicable grace
periods or any extension of any maturity date) under the Indebtedness of the
Company or the Indebtedness of any the Company's Subsidiaries with an aggregate
amount outstanding in excess of $10,000,000 (i) resulting from the failure to
pay principal of or interest on such Indebtedness; or (ii) if as a result of
such default, the maturity of such Indebtedness has been accelerated prior to
its stated maturity; (e) final nonappealable unsatisfied judgments not covered
by insurance aggregating in excess of $10,000,000, at any one time rendered
against the Company or any of its Subsidiaries and not stayed, bonded or
discharged within 60 days; (f) any Guarantee of a Guarantor ceases to be in full
force and effect or becomes unenforceable or invalid or is declared null and
void (other than in accordance with the terms of the Guarantee and the
Indenture) or any Guarantor denies or disaffirms its Obligations under its
Guarantee or the Collateral Agreements; (g) any failure to comply with any
material agreement or covenant in, or material provision of, any of the
Collateral Agreements, or any breach of a representation under, the Collateral
Agreements; (h) any of the Collateral Agreements ceases to be in full force and
effect (except as contemplated in the Indenture or the Collateral Agreements) or
any of the Collateral Agreements ceases to give the Trustee (or, in the case of
a Mortgage, ceases to give the Trustee or any other trustee under such Mortgage)
any of the Liens, rights, powers or privileges purported to be created thereby
with respect to a material portion of the Collateral (except as contemplated in
the Indenture or the Collateral Agreements), or any of the Collateral Agreements
is declared null and void by the Company or a court of competent jurisdiction
(except as contemplated in the Indenture or the Collateral Agreements), or the
Company or any Guarantor denies that it has any further liability under any
Collateral Agreement to which it is a party or gives notice of such effect (in
each case other than by reason of the termination of the Indenture or any such
Collateral Agreement in accordance with its terms or the release of any
Guarantor in accordance with the Indenture); (i) a court having jurisdiction in
the premises enters a decree or order for (A) relief in respect of the Company
or any Significant Subsidiary in an involuntary case under any applicable
Bankruptcy Law now or hereafter in effect, (B) appointment of a receiver,
liquidator, assignee, custodian, trustee, sequestrator or similar official of
the Company or any Significant Subsidiary or for all or substantially all of the
property and

                                      A-11
<PAGE>
assets of the Company or any Significant Subsidiary or (C) the winding up or
liquidation of the affairs of the Company or any Significant Subsidiary and, in
each case, such decree or order shall remain unstayed and in effect for a period
of 60 consecutive days; (j) the Company or any Significant Subsidiary (A)
commences a voluntary case under any applicable Bankruptcy Law now or hereafter
in effect, or consents to the entry of an order for relief in an involuntary
case under any such law, (B) consents to the appointment of or taking possession
by a receiver, liquidator, assignee, custodian, trustee, sequestrator or similar
official of the Company or any Significant Subsidiary or for all or
substantially all of the property and assets of the Company or any Significant
Subsidiary or (C) effects any general assignment for the benefit of creditors;
or (k) failure by the Company or the Guarantors to notify the Trustee within 3
Business Days following its discovery of any Default.

                  If a Default occurs and is continuing, the Trustee must,
within 90 days after the occurrence of such Default, give to the Holders notice
of such Default, but the Trustee shall be protected in withholding such notice
if it in good faith determines that the withholding of such notice is in the
interest of the Holders, except in the case of a Default in the payment of the
principal of, premium, if any, or interest on any of the Notes when due or in
the payment of any redemption or repurchase obligation.

         13. Trustee Dealings with Company. The Trustee, in its individual or
any other capacity, may make loans to, accept deposits from, and perform
services for the Company or its Affiliates, and may otherwise deal with the
Company or its Affiliates, as if it were not the Trustee.

         14. No Recourse Against Others. No past, present or future, direct or
indirect, stockholder, employee, officer, director agent or representative of
the Company, the Guarantors or any successor entity, as such, shall have any
liability for any Obligations of the Company or the Guarantors under the Notes,
the Guarantees or the Indenture or for any claim based on, in respect of, or by
reason of, such Obligations or their creation, except in their capacity as an
obligor or Guarantor of the Notes in accordance with the Indenture. Each Holder
by accepting a Note waives and releases all such liability. The waiver and
release are part of the consideration for issuance of the Notes.

         15. Authentication. This Note shall not be valid until authenticated by
the manual signature of the Trustee or an authenticating agent.

         16. Abbreviations. Customary abbreviations may be used in the name of a
Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (=
tenants by the entireties), JT TEN (= joint tenants with right of survivorship
and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts
to Minors Act).

         17. Additional Rights of Holders of Transfer Restricted Notes.(7) In
addition to the rights provided to Holders of Notes under the Indenture, Holders
of Transfer Restricted Notes shall have all the rights set forth in the Note
Registration Rights Agreement dated as of the date

------------------

         (7) To be included only on Transfer Restricted Notes.

                                      A-12
<PAGE>
of the Indenture, by and among the Company, the Guarantors and the Initial
Purchasers (the "Note Registration Rights Agreement").

         18. CUSIP Numbers. Pursuant to a recommendation promulgated by the
Committee on Uniform Security Identification Procedures, the Company has caused
CUSIP numbers to be printed on the Notes and the Trustee may use CUSIP numbers
in notices of redemption as a convenience to Holders. No representation is made
as to the accuracy of such numbers either as printed on the Notes or as
contained in any notice of redemption and reliance may be placed only on the
other identification numbers placed thereon, and any such redemption shall not
be affected by any defect in or omission of such numbers.

         19. Notation of Guarantee. As more fully set forth in the Indenture, by
its execution of its Guarantee, each of the Guarantors acknowledges and agrees
that it receives substantial benefits from the Company and that such party is
providing its Guarantee for good and valuable consideration, including, without
limitation, such substantial benefits and services. Accordingly, subject to the
provisions of Article X of the Indenture, each Guarantor, jointly and severally,
unconditionally guarantees on a senior subordinated basis to each Holder of a
Note authenticated and delivered by the Trustee and its successors and assigns
that: (i) the principal of, interest, premium, if any, and Liquidated Damages,
if any, on the Notes shall be duly and punctually paid in full when due, whether
at maturity, by acceleration, call for redemption, upon a Change of Control
Offer, an Asset Sale Offer or otherwise, and interest on overdue principal,
premium, if any, Liquidated Damages, if any, and (to the extent permitted by
law) interest on any interest, if any, on the Notes and all other obligations of
the Company to the Holders or the Trustee under the Notes, the Indenture, the
Collateral Agreements and the Note Registration Rights Agreement (including
fees, expenses or other) shall be promptly paid in full or performed, all in
accordance with the terms of the Indenture; and (ii) in case of any extension of
time of payment or renewal of any Notes or any of such other obligations, the
same shall be promptly paid in full when due or performed in accordance with the
terms of the extension or renewal, whether at stated maturity, by acceleration,
call for redemption, upon a Change of Control, an Asset Sale Offer or otherwise,
subject, however, in the case of clauses (i) and (ii) above, to the limitations
set forth in Section 10.8 of the Indenture.

                  When a successor assumes all the obligations of its
predecessor under the Notes and the Indenture, the predecessor may be released
from those obligations.

         20. Governing Law. THE INDENTURE, THE NOTES AND THE GUARANTEES SHALL BE
GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK,
INCLUDING, WITHOUT LIMITATION, SECTIONS 5-1401 AND 5-1402 OF THE NEW YORK
GENERAL OBLIGATIONS LAW AND NEW YORK CIVIL LAWS AND RULES 327(b).

                  The Company will furnish to any Holder upon written request
and without charge a copy of the Indenture [and/or the Note Registration Rights
Agreement](8). Requests may be made to:

------------------

(8) To be included only on Transfer Restricted Notes.

                                      A-13
<PAGE>
                    ORBITAL SCIENCES CORPORATION
                    21839 Atlantic Blvd.
                    Dulles, VA 20166
                    Attention: Chief Financial Officer

                                      A-14
<PAGE>
                                 ASSIGNMENT FORM

                  To assign this Note, fill in the form below: (I) or (We)
assign and transfer this Note to

------------------------------------------------------------------------------
                 (Insert assignee's soc. sec. or tax I.D. no.)

------------------------------------------------------------------------------

------------------------------------------------------------------------------

------------------------------------------------------------------------------

------------------------------------------------------------------------------
             (Print or type assignee's name, address and zip code)

and irrevocably appoint
to transfer this Note on the books of the Company. The agent may substitute
another to act for it.

------------------------------------------------------------------------------.

Date:
     ------------------

                                    Your Signature:
                                                   --------------------------
                    (Sign exactly as your name appears on the face of this Note)

Signature Guarantee*

-------------------------------------------------------------------------------

*NOTICE: The Signature must be guaranteed by an Institution which is a member of
one of the following recognized signature Guarantee Programs: (i) The Securities
Transfer Agent Medallion Program (STAMP); (ii) The New York Stock Exchange
Medallion Program (MNSP); (iii) The Stock Exchange Medallion Program (SEMP); or
(iv) such other guarantee program acceptable to the Trustee.

                                      A-15
<PAGE>
                       OPTION OF HOLDER TO ELECT PURCHASE

                  If you want to elect to have this Note purchased by the
Company pursuant to Section 4.13 or Section 4.16 of the Indenture, check the box
below:

                        [ ] Section 4.13 [ ] Section 4.16

                  If you want to elect to have only part of the Note purchased
by the Company pursuant to Section 4.13 or Section 4.16 of the Indenture, state
the amount you elect to have purchased (in denominations of $1,000 only, except
if you have elected to have all of your Notes purchased): $___________

Date: ________________________   Your Signature:_______________________________
                                 (Sign exactly as your name appears on the Note)

                        Social Security or Tax Identification No.:______________

Signature Guarantee*

________________________________________________________________________________

*NOTICE: The Signature must be guaranteed by an Institution which is a member of
one of the following recognized signature Guarantee Programs: (i) The Securities
Transfer Agent Medallion Program (STAMP); (ii) The New York Stock Exchange
Medallion Program (MNSP); (iii) The Stock Exchange Medallion Program (SEMP); or
(iv) such other guarantee program acceptable to the Trustee.

                                      A-16
<PAGE>
             SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL NOTE(9)

         The following exchanges of an interest in this Global Note for an
interest in another Global Notes or for a Definitive Note, or exchanges of an
interest in another Global Note or a Definitive Note for an interest in this
Global Note, have been made:

<TABLE>
<CAPTION>
                       Amount of               Amount of                Principal Amount of         Signature of
                       Decrease in             Increase in              this Global Note            Authorized Officer
                       Principal Amount of     Principal Amount of      Following Such Decrease     of Trustee or Note
Date of Exchange       this Global Note        this Global Note         or Increase                 Custodian
----------------       -------------------     -------------------      -----------------------     ------------------
<S>                    <C>                     <C>                      <C>                         <C>
</TABLE>

------------------

(9) This should be included only if the Note is issued in global form.

                                      A-17
<PAGE>
                                    GUARANTEE

                  The Guarantor listed below (hereinafter referred to as the
"Guarantor," which term includes any successors or assigns under the Indenture,
dated the date hereof, among the Guarantor, the Company (defined below) and U.S.
Bank, N.A., as trustee (the "Indenture") and any additional Guarantors), have
irrevocably and unconditionally guaranteed on a senior subordinated basis the
Guarantee Obligations (as defined in Section 10.8 of the Indenture), which
include (i) the due and punctual payment of the principal of, premium, if any,
and interest and Liquidated Damages, if any, on the 12% Second Priority Secured
Notes due 2006 (the "Notes") of Orbital Sciences Corporation, a Delaware
corporation (the "Company"), whether at maturity, by acceleration, call for
redemption, upon a Change of Control Offer, an Asset Sale Offer, or otherwise,
the due and punctual payment of interest on the overdue principal and premium,
if any, and (to the extent permitted by law) interest on any interest on the
Notes, and the due and punctual performance of all other obligations of the
Company to the Holders or the Trustee under the Notes, the Indenture, the
Collateral Agreements and the Note Registration Rights Agreement, all in
accordance with the terms set forth in Article X of the Indenture, and (ii) in
case of any extension of time of payment or renewal of any Notes or any of such
other obligations under the Notes, the Indenture, the Collateral Agreements and
the Note Registration Rights Agreement, that the same will be promptly paid in
full when due or performed in accordance with the terms of the extension or
renewal, whether at stated maturity, by acceleration, call for redemption, upon
a Change of Control Offer, an Asset Sale Offer, or otherwise, subject, however,
in the case of clauses (i) and (ii) above, to the limitations set forth in
Section 10.12 of the Indenture.

                  The obligations of the Guarantor to the Holders and to the
Trustee pursuant to this Guarantee and the Indenture are expressly set forth in
Article X of the Indenture and reference is hereby made to such Indenture for
the precise terms of this Guarantee.

                  No past, present or future, direct or indirect, stockholder,
employee, officer, director, agent or representative of the Company, the
Guarantor or any successor entity, as such, shall have any liability for any
Obligations of the Company or the Guarantor under the Notes, the Guarantees or
the Indenture or for any claim based on, in respect of, or by reason of, such
Obligations or their creation, except in their capacity as an obligor or
Guarantor of the Notes in accordance with the Indenture.

                  This is a continuing Guarantee and shall remain in full force
and effect and shall be binding upon the Guarantor and its successors and
assigns until full and final payment of all of the Company's obligations under
the Notes and Indenture or until released or defeased in accordance with the
Indenture and shall inure to the benefit of the successors and assigns of the
Trustee and the Holders, and, in the event of any transfer or assignment of
rights by any Holder or the Trustee, the rights and privileges herein conferred
upon that party shall automatically extend to and be vested in such transferee
or assignee, all subject to the terms and conditions hereof. This is a Guarantee
of payment and performance and not of collectibility.

                  This Guarantee shall not be valid or obligatory for any
purpose until the certificate of authentication on the Note upon which this
Guarantee is noted shall have been executed by the Trustee under the Indenture
by the manual signature of one of its authorized officers.

                                      A-18
<PAGE>

                  The obligations of the Guarantor under this Guarantee shall be
limited to the extent necessary to insure that it does not constitute a
fraudulent conveyance under applicable law.

                  THE TERMS OF ARTICLE X OF THE INDENTURE ARE INCORPORATED
HEREIN BY REFERENCE.

                  Capitalized terms used herein have the same meanings given in
the Indenture unless otherwise indicated.

                                      A-19
<PAGE>
                  IN WITNESS WHEREOF, the Guarantor has caused this instrument
to be duly executed.

Dated: _____________

                                                  ORBITAL INTERNATIONAL, INC.

                                                  By:__________________________
                                                         Name:
                                                         Title:

<PAGE>
                                    EXHIBIT B

                            FORM OF UNIT CERTIFICATE

NO.                                                                    CUSIP NO.

                          ORBITAL SCIENCES CORPORATION

                                  135,000 UNITS

         THIS GLOBAL UNIT IS COMPOSED OF THE ATTACHED GLOBAL SECOND PRIORITY
SECURED NOTE AND GLOBAL WARRANT CERTIFICATE. THE GLOBAL UNIT, THE GLOBAL SECOND
PRIORITY SECURED NOTE AND THE GLOBAL WARRANT CERTIFICATE ARE COLLECTIVELY
REFERRED TO HEREIN AS THE "SECURITIES."

         THE SECURITIES ARE INITIALLY ISSUED AS PART OF AN ISSUANCE OF 135,000
UNITS (THE "UNITS"), EACH OF WHICH CONSISTS OF $1,000 PRINCIPAL AMOUNT AT
MATURITY OF THE 12% SERIES A SECOND PRIORITY SECURED NOTES DUE 2006,OF ORBITAL
SCIENCES CORPORATION (THE "COMPANY" AND, SUCH NOTES, THE "NOTES") AND ONE
WARRANT (COLLECTIVELY, THE "WARRANTS") INITIALLY ENTITLING THE HOLDER THEREOF TO
PURCHASE 122.23 SHARES OF COMMON STOCK, PAR VALUE $.01 PER SHARE, OF THE COMPANY
(SUCH SHARES, THE "WARRANT SHARES").

         THE SECURITIES ARE GLOBAL SECURITIES WITHIN THE MEANING OF THE
INDENTURE GOVERNING THE NOTES (THE "INDENTURE"), WHICH ARE REPRESENTED BY THE
GLOBAL SENIOR NOTE CERTIFICATE, AND THE WARRANT AGREEMENT GOVERNING THE
WARRANTS, WHICH ARE REPRESENTED BY THE GLOBAL WARRANT CERTIFICATE (THE "WARRANT
AGREEMENT"), AND ARE REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE OF A
DEPOSITARY OR A SUCCESSOR DEPOSITARY. THE SECURITIES ARE NOT EXCHANGEABLE FOR
SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS
NOMINEE EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE AND THE
WARRANT AGREEMENT, AND NO TRANSFER OF THE SECURITIES (OTHER THAN A TRANSFER OF
THE SECURITIES AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY
A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE
DEPOSITARY, OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY
OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY) MAY BE REGISTERED EXCEPT IN THE
LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE AND THE WARRANT AGREEMENT.

         UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF
THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO THE ISSUERS OR
THEIR AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY
CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME
AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE
TO CEDE & CO. OR TO SUCH OTHER ENTITY AS MAY BE

<PAGE>
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER
USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS
THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                  THE NOTE AND THE WARRANT CERTIFICATE UNDERLYING THIS UNIT MAY
BE TRANSFERRED OR EXCHANGED SEPARATELY FROM THE NOTES AT THE OPTION OF THE
HOLDER UPON NOTICE TO THE WARRANT AGENT AND WILL BE MANDATORILY SEPARABLE
FOLLOWING THE EARLIER TO OCCUR OF (I) THE DATE ON WHICH A REGISTRATION STATEMENT
WITH RESPECT TO A REGISTERED EXCHANGE OFFER FOR THE NOTES IS DECLARED EFFECTIVE
UNDER THE ACT, AND (II) THE DATE ON WHICH A SHELF REGISTRATION STATEMENT WITH
RESPECT TO THE NOTES OR THE WARRANTS AND WARRANT SHARES IS DECLARED EFFECTIVE
UNDER THE SECURITIES ACT.

                  THIS UNIT HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS. NEITHER
THIS UNIT NOR ANY INTEREST OR PARTICIPATION HEREIN MAY BE REOFFERED, SOLD,
ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR OTHERWISE DISPOSED OF IN THE
ABSENCE OF SUCH REGISTRATION OR UNLESS SUCH TRANSACTION IS EXEMPT FROM, OR NOT
SUBJECT TO, REGISTRATION. THE HOLDER OF THIS UNIT BY ITS ACCEPTANCE HEREOF
AGREES TO OFFER, SELL OR OTHERWISE TRANSFER THIS UNIT, PRIOR TO THE DATE WHICH
IS TWO YEARS (OR SUCH OTHER PERIOD THAT MAY HEREAFTER BE PROVIDED UNDER RULE
144(K) UNDER THE SECURITIES ACT AS PERMITTING RESALES OF RESTRICTED SECURITIES
BY NON- AFFILIATES WITHOUT RESTRICTION) AFTER THE LATER OF THE ORIGINAL ISSUE
DATE HEREOF AND THE LAST DATE ON WHICH THE COMPANY OR ANY AFFILIATE OF THE
COMPANY WAS THE OWNER OF THIS UNIT (OR ANY PREDECESSOR OF THIS UNIT) (THE
"RESALE RESTRICTION TERMINATION DATE") ONLY (A) TO THE COMPANY, (B) PURSUANT TO
A REGISTRATION STATEMENT WHICH HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES
ACT, (C) FOR SO LONG AS THIS UNIT IS ELIGIBLE FOR RESALE PURSUANT TO RULE 144A
UNDER THE SECURITIES ACT, IN THE UNITED STATES TO A PERSON IT REASONABLY
BELIEVES IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE
SECURITIES ACT) THAT PURCHASES FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A
QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS GIVEN THAT THE TRANSFER IS BEING
MADE IN RELIANCE ON RULE 144A UNDER THE SECURITIES ACT, (D) TO AN INSTITUTIONAL
"ACCREDITED INVESTOR" WITHIN THE MEANING OF SUBPARAGRAPH (a)(1), (2), (3) OR (7)
OF RULE 501 UNDER THE SECURITIES ACT THAT IS ACQUIRING THIS UNIT FOR ITS OWN
ACCOUNT, OR FOR THE ACCOUNT OF SUCH AN INSTITUTIONAL "ACCREDITED INVESTOR," FOR
INVESTMENT PURPOSES AND NOT WITH A VIEW TO, OR FOR OFFER OR SALE IN CONNECTION
WITH, ANY DISTRIBUTION IN VIOLATION OF THE SECURITIES ACT, (E) OUTSIDE OF THE
UNITED STATES IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH RULE 904 UNDER THE
SECURITIES ACT OR (F) PURSUANT TO ANOTHER AVAILABLE EXEMPTION FROM THE
REGISTRATION REQUIREMENTS OF THE SECURITIES ACT, SUBJECT

                                       B-2
<PAGE>
TO THE COMPANY'S AND THE TRUSTEE'S RIGHT PRIOR TO ANY SUCH OFFER, SALE OR
TRANSFER TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL, CERTIFICATIONS AND/OR
OTHER INFORMATION SATISFACTORY TO EACH OF THEM, AND IN EACH OF THE FOREGOING
CASES, A CERTIFICATE OF TRANSFER IN THE FORM APPEARING ON THIS UNIT IS COMPLETED
AND DELIVERED BY THE TRANSFEROR TO THE TRUSTEE AND IN EACH CASE IN ACCORDANCE
WITH APPLICABLE SECURITIES LAWS OF ANY U.S. STATE OR ANY OTHER APPLICABLE
JURISDICTION. THE HOLDER OF THIS UNIT AGREES THAT IT WILL DELIVER TO EACH PERSON
TO WHOM THIS UNIT IS TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS
LEGEND. THIS LEGEND WILL BE REMOVED UPON THE REQUEST OF THE HOLDER AFTER THE
RESALE RESTRICTION TERMINATION DATE.

                                                  ORBITAL SCIENCES CORPORATION

                                                  By:___________________________
                                                           Name:
                                                           Title:

Date: _________________

                                       B-3
<PAGE>
                                    EXHIBIT C
                         FORM OF CERTIFICATE OF TRANSFER

Orbital Sciences Corporation
21839 Atlantic Blvd.
Dulles, VA 20166

U.S. Bank, N.A.
180 East 5th Street 55101
St. Paul, Minnesota 55101

         Re: 12% Second Priority Secured Notes due 2006

Dear Sirs:

         Reference is hereby made to the Indenture, dated as of August 22, 2002
(the "Indenture"), among Orbital Sciences Corporation, as issuer (the
"Company"), the Guarantors party thereto and U.S. Bank, N.A., as trustee.
Capitalized terms used but not defined herein shall have the meanings given to
them in the Indenture. ______________, (the "Transferor") owns and proposes to
transfer the Note[s] or interest in such Note[s] specified in Annex A hereto, in
the principal amount of $___________ in such Note[s] or interests (the
"Transfer"), to __________ (the "Transferee"), as further specified in Annex A
hereto. In connection with the Transfer, the Transferor hereby certifies that:

[CHECK ALL THAT APPLY]

1. [ ] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL INTEREST IN THE
144A GLOBAL NOTE OR A DEFINITIVE NOTE PURSUANT TO RULE 144A. The Transfer is
being effected pursuant to and in accordance with Rule 144A under the United
States Securities Act of 1933, as amended (the "Securities Act"), and,
accordingly, the Transferor hereby further certifies that the beneficial
interest or Definitive Note is being transferred to a Person that the Transferor
reasonably believed and believes is purchasing the beneficial interest or
Definitive Note for its own account, or for one or more accounts with respect to
which such Person exercises sole investment discretion, and such Person and each
such account is a "qualified institutional buyer" within the meaning of Rule
144A in a transaction meeting the requirements of Rule 144A and such Transfer is
in compliance with any applicable blue sky securities laws of any State of the
United States. Upon consummation of the proposed Transfer in accordance with the
terms of the Indenture, the transferred beneficial interest or Definitive Note
will be subject to the restrictions on transfer enumerated in the Private
Placement Legend printed on the 144A Global Note and/or the Definitive Note and
in the Indenture and the Securities Act.

2. [ ] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL INTEREST IN THE
REGULATION S GLOBAL NOTE OR A DEFINITIVE NOTE PURSUANT TO REGULATION S. The
Transfer is being effected pursuant to and in accordance with Rule 903 or Rule
904 under the Securities Act and, accordingly, the Transferor hereby further
certifies that (i) the Transfer is not being

                                       C-1
<PAGE>
made to a person in the United States and (x) at the time the buy order was
originated, the Transferee was outside the United States or such Transferor and
any Person acting on its behalf reasonably believed and believes that the
Transferee was outside the United States or (y) the transaction was executed in,
on or through the facilities of a designated offshore securities market and
neither such Transferor nor any Person acting on its behalf knows that the
transaction was prearranged with a buyer in the United States, (ii) no directed
selling efforts have been made in contravention of the requirements of Rule
903(b) or Rule 904(b) of Regulation S under the Securities Act, (iii) the
transaction is not part of a plan or scheme to evade the registration
requirements of the Securities Act and (iv) if the proposed transfer is being
made prior to the expiration of the Distribution Compliance Period, the transfer
is not being made to a U.S. Person or for the account or benefit of a U.S.
Person (other than an Initial Purchaser) and the interest transferred will be
held immediately thereafter through Euroclear or Clearstream. Upon consummation
of the proposed transfer in accordance with the terms of the Indenture, the
transferred beneficial interest or Definitive Note will be subject to the
restrictions on Transfer enumerated in the Private Placement Legend printed on
the Regulation S Global Note and/or the Definitive Note and in the Indenture and
the Securities Act.

3. [ ] CHECK AND COMPLETE IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL
INTEREST IN A DEFINITIVE NOTE PURSUANT TO ANY PROVISION OF THE SECURITIES ACT
OTHER THAN RULE 144A OR REGULATION S. The Transfer is being effected in
compliance with the transfer restrictions applicable to beneficial interests in
Restricted Global Notes and Restricted Definitive Notes and pursuant to and in
accordance with the Securities Act and any applicable blue sky securities laws
of any State of the United States, and accordingly the Transferor hereby further
certifies that (check one):

         (a) [ ] Such Transfer is being effected pursuant to and in accordance
         with Rule 144 under the Securities Act; or

         (b) [ ] Such Transfer is being effected to the Company or a subsidiary
         thereof; or

         (c) [ ] Such Transfer is being effected pursuant to an effective
         registration statement under the Securities Act and in compliance with
         the prospectus delivery requirements of the Securities Act; or

         (d) [ ] such Transfer is being effected to an Institutional Accredited
         Investor and pursuant to an exemption from the registration
         requirements of the Securities Act other than Rule 144A, Rule 144 or
         Rule 904, and the Transferor hereby further certifies that it has not
         engaged in any general solicitation within the meaning of Regulation D
         under the Securities Act and the Transfer complies with the transfer
         restrictions applicable to beneficial interests in a Restricted Global
         Note or Restricted Definitive Notes and the requirements of the
         exemption claimed, which certification is supported by (1) a
         certificate executed by the Transferee in a form of Exhibit E to the
         Indenture and (2) if such Transfer is in respect of a principal amount
         of Notes at the time of transfer of less than $250,000, an Opinion of
         Counsel provided by the Transferor or the Transferee (a copy of which
         the Transferor has attached to this certification and provided to the
         Company, which has confirmed its acceptability), to the effect that

                                       C-2
<PAGE>
         such Transfer is in compliance with the Securities Act. Upon
         consummation of the proposed transfer in accordance with the terms of
         the Indenture, the Definitive Note will be subject to the restrictions
         on transfer enumerated in the Private Placement Legend printed on the
         Definitive Notes and in the Indenture and the Securities Act.

         4. [ ] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL INTEREST
         IN AN UNRESTRICTED GLOBAL NOTE OR OF AN UNRESTRICTED DEFINITIVE NOTE.

                  (a) [ ] CHECK IF TRANSFER IS PURSUANT TO RULE 144. (i) The
         Transfer is being effected pursuant to and in accordance with Rule 144
         under the Securities Act and in compliance with the transfer
         restrictions contained in the Indenture and any applicable blue sky
         securities laws of any State of the United States and (ii) the
         restrictions on transfer contained in the Indenture and the Private
         Placement Legend are not required in order to maintain compliance with
         the Securities Act. Upon consummation of the proposed Transfer in
         accordance with the terms of the Indenture, the transferred beneficial
         interest or Definitive Note will no longer be subject to the
         restrictions on transfer enumerated in the Private Placement Legend
         printed on the Restricted Global Notes, on Restricted Definitive Notes
         and in the Indenture and the Securities Act.

                  (b) [ ] CHECK IF TRANSFER IS PURSUANT TO REGULATION S. (i) The
         Transfer is being effected pursuant to and in accordance with Rule 903
         or Rule 904 under the Securities Act and in compliance with the
         transfer restrictions contained in the Indenture and any applicable
         blue sky securities laws of any State of the United States and (ii) the
         restrictions on transfer contained in the Indenture and the Private
         Placement Legend are not required in order to maintain compliance with
         the Securities Act. Upon consummation of the proposed Transfer in
         accordance with the terms of the Indenture, the transferred beneficial
         interest or Definitive Note will no longer be subject to the
         restrictions on transfer enumerated in the Private Placement Legend
         printed on the Restricted Global Notes, on Restricted Definitive Notes
         and in the Indenture and the Securities Act.

                  (c) [ ] CHECK IF TRANSFER IS PURSUANT TO OTHER EXEMPTION. (i)
         The Transfer is being effected pursuant to and in compliance with an
         exemption from the registration requirements of the Securities Act
         other than Rule 144, Rule 903 or Rule 904 and in compliance with the
         transfer restrictions contained in the Indenture and any applicable
         blue sky securities laws of any State of the United States and (ii) the
         restrictions on transfer contained in the Indenture and the Private
         Placement Legend are not required in order to maintain compliance with
         the Securities Act. Upon consummation of the proposed Transfer in
         accordance with the terms of the Indenture, the transferred beneficial
         interest or Definitive Note will not be subject to the restrictions on
         transfer enumerated in the Private Placement Legend printed on the
         Restricted Global Notes or Restricted Definitive Notes and in the
         Indenture.

                                      C-3
<PAGE>
This certificate and the statements contained herein are made for your benefit
and the benefit of the Company.

_______________________________              Dated: ____________________________
[Insert Name of Transferor]

By: ____________________________
   Name:
   Title:

                                       C-4
<PAGE>
                       ANNEX A TO CERTIFICATE OF TRANSFER

         1. The Transferor owns and proposes to transfer the following:

         [[CHECK ONE OF (a) OR (b)]

                  (a) [ ] a beneficial interest in the:

                           (i)   [ ] 144A Global Note, or

                           (ii)  [ ] 501 Global Note, or

                           (iii) [ ] Reg S Global Note; or

                  (b) [ ] a Restricted Definitive Note.

         2. After the Transfer the Transferee will hold:

         [CHECK ONE]

                  (a) [ ] a beneficial interest in the:

                           (i)   [ ] 144A Global Note, or

                           (ii)  [ ] 501 Global Note, or

                           (iii) [ ] Reg S Global Note,

                           (iv)  [ ] Unrestricted Global Note; or

                  (b) [ ] a Restricted Definitive Note; or

                  (c) [ ] an Unrestricted Definitive Note,

in accordance with the terms of the Indenture.

                                       C-5
<PAGE>
                                    EXHIBIT D
                         FORM OF CERTIFICATE OF EXCHANGE

Orbital Sciences Corporation
21839 Atlantic Blvd.
Dulles, VA 20166

U.S. Bank, N.A.
180 East 5th Street 55101
St. Paul, Minnesota 55101

         Re: 12% Second Priority Secured Notes due 2006

Dear Sirs:

         Reference is hereby made to the Indenture, dated as of August 22, 2002
(the "Indenture"), between Orbital Sciences Corporation, as issuer (the
"Company"), the Guarantors party thereto and U.S. Bank, N.A., as trustee.
Capitalized terms used but not defined herein shall have the meanings given to
them in the Indenture.

         ____________, (the "Owner") owns and proposes to exchange the Note[s]
or interest in such Note[s] specified herein, in the principal amount of
$____________ in such Note[s] or interests (the "Exchange"). In connection with
the Exchange, the Owner hereby certifies that:

1. EXCHANGE OF RESTRICTED DEFINITIVE NOTES OR BENEFICIAL INTERESTS IN A
RESTRICTED GLOBAL NOTE FOR UNRESTRICTED DEFINITIVE NOTES OR BENEFICIAL INTERESTS
IN AN UNRESTRICTED GLOBAL NOTE.

                  (a) [ ] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A
RESTRICTED GLOBAL NOTE TO BENEFICIAL INTEREST IN AN UNRESTRICTED GLOBAL NOTE. In
connection with the Exchange of the Owner's beneficial interest in a Restricted
Global Note for a beneficial interest in an Unrestricted Global Note in an equal
principal amount, the Owner hereby certifies (i) the beneficial interest is
being acquired for the Owner's own account without transfer, (ii) such Exchange
has been effected in compliance with the transfer restrictions applicable to the
Restricted Global Notes and pursuant to and in accordance with the United States
Securities Act of 1933, as amended (the "Securities Act"), (iii) the
restrictions on transfer contained in the Indenture and the Private Placement
Legend are not required in order to maintain compliance with the Securities Act
and (iv) the beneficial interest in an Unrestricted Global Note is being
acquired in compliance with any applicable blue sky securities laws of any State
of the United States.

                  (b) [ ] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A
RESTRICTED GLOBAL NOTE TO UNRESTRICTED DEFINITIVE NOTE. In connection with the
Exchange of

                                      D-1
<PAGE>
the Owner's beneficial interest in a Restricted Global Note for an Unrestricted
Definitive Note, the Owner hereby certifies (i) the Definitive Note is being
acquired for the Owner's own account without transfer, (ii) such Exchange has
been effected in compliance with the transfer restrictions applicable to the
Restricted Global Notes and pursuant to and in accordance with the Securities
Act, (iii) the restrictions on transfer contained in the Indenture and the
Private Placement Legend are not required in order to maintain compliance with
the Securities Act and (iv) the Unrestricted Definitive Note is being acquired
in compliance with any applicable blue sky securities laws of any State of the
United States.

                  (c) [ ] CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE NOTE
TO BENEFICIAL INTEREST IN AN UNRESTRICTED GLOBAL NOTE. In connection with the
Owner's Exchange of a Restricted Definitive Note for a beneficial interest in an
Unrestricted Global Note, the Owner hereby certifies (i) the beneficial interest
is being acquired for the Owner's own account without transfer, (ii) such
Exchange has been effected in compliance with the transfer restrictions
applicable to Restricted Definitive Notes and pursuant to and in accordance with
the Securities Act, (iii) the restrictions on transfer contained in the
Indenture and the Private Placement Legend are not required in order to maintain
compliance with the Securities Act and (iv) the beneficial interest is being
acquired in compliance with any applicable blue sky securities laws of any State
of the United States.

                  (d) [ ] CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE NOTE
TO UNRESTRICTED DEFINITIVE NOTE. In connection with the Owner's Exchange of a
Restricted Definitive Note for an Unrestricted Definitive Note, the Owner hereby
certifies (i) the Unrestricted Definitive Note is being acquired for the Owner's
own account without transfer, (ii) such Exchange has been effected in compliance
with the transfer restrictions applicable to Restricted Definitive Notes and
pursuant to and in accordance with the Securities Act, (iii) the restrictions on
transfer contained in the Indenture and the Private Placement Legend are not
required in order to maintain compliance with the Securities Act and (iv) the
Unrestricted Definitive Note is being acquired in compliance with any applicable
blue sky securities laws of any State of the United States.

         2. EXCHANGE OF RESTRICTED DEFINITIVE NOTES OR BENEFICIAL INTERESTS IN
RESTRICTED GLOBAL NOTES FOR RESTRICTED DEFINITIVE NOTES OR BENEFICIAL INTERESTS
IN RESTRICTED GLOBAL NOTES.

                  (a)  [  ] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A
RESTRICTED GLOBAL NOTE TO RESTRICTED DEFINITIVE NOTE. In connection with the
Exchange of the Owner's beneficial interest in a Restricted Global Note for a
Restricted Definitive Note with an equal principal amount, the Owner hereby
certifies that (i) the Restricted Definitive Note is being acquired for the
Owner's own account without transfer and (ii) such Exchange has been effected in
compliance with the transfer restrictions applicable to the Restricted Global
Notes and pursuant to and in accordance with the Securities Act, and in
compliance with any applicable blue sky securities laws of any State of the
United States. Upon consummation of the proposed Exchange in accordance with the
terms of the Indenture, the Restricted Definitive Note issued will continue to
be subject to the restrictions on transfer enumerated in the Private Placement
Legend printed on the Restricted Definitive Note and in the Indenture and the
Securities Act.

                                      D-2
<PAGE>
                  (b) [ ] CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE NOTE
TO BENEFICIAL INTEREST IN A RESTRICTED GLOBAL NOTE. In connection with the
Exchange of the Owner's Restricted Definitive Note for a beneficial interest in
the: [CHECK ONE] [ ] 144A Global Note, [ ] Reg S Global Note, or [ ] 501 Global
Note with an equal principal amount, the Owner hereby certifies (i) the
beneficial interest is being acquired for the Owner's own account without
transfer and (ii) such Exchange has been effected in compliance with the
transfer restrictions applicable to the Restricted Global Notes and pursuant to
and in accordance with the Securities Act, and in compliance with any applicable
blue sky securities laws of any State of the United States. Upon consummation of
the proposed Exchange in accordance with the terms of the Indenture, the
beneficial interest issued will be subject to the restrictions on transfer
enumerated in the Private Placement Legend printed on the relevant Restricted
Global Note and in the Indenture and the Securities Act.

                                      D-3
<PAGE>
This certificate and the statements contained herein are made for your benefit
and the benefit of the Company.

__________________________
[Insert Name of Owner]

By:_______________________
  Name:
  Title:

Dated:____________________

                                      D-4
<PAGE>
                                    EXHIBIT E
                       FORM OF CERTIFICATE FROM ACQUIRING
                        INSTITUTIONAL ACCREDITED INVESTOR

Orbital Sciences Corporation
21839 Atlantic Blvd.
Dulles, VA 20166

U.S. Bank, N.A.
180 East 5th Street 55101
St. Paul, Minnesota 55101

         Re: 12% Second Priority Secured Notes due 2006

Dear Sirs:

         Reference is hereby made to the Indenture, dated as of August 22, 2002
(the "Indenture"), between Orbital Sciences Corporation, as issuer (the
"Company"), the Guarantors party thereto and U.S. Bank, N.A., as trustee.
Capitalized terms used but not defined herein shall have the meanings given to
them in the Indenture.

         In connection with our proposed purchase of $____________ aggregate
principal amount of: (a) a beneficial interest in a Global Note, or (b) a
Definitive Note, we confirm that:

1.       We understand and acknowledge that the Notes have not been registered
         under the Securities Act of 1933, as amended (the "Securities Act"), or
         any other applicable securities law, and may not be offered, sold or
         otherwise transferred except in compliance with the registration
         requirements of the Securities Act or any other applicable securities
         law or pursuant to an exemption therefrom and in each case in
         compliance with the conditions for transfer set forth below.

2.       We are an institutional "accredited investor" under the Securities Act
         within the meaning of subparagraph (a)(1), (2), (3) or (7) of Rule 501
         under the Securities Act ("Rule 501") or, if the Notes are to be
         purchased for one or more accounts ("investor accounts") for which we
         are acting as fiduciary or agent, each such investor account is an
         institutional "accredited investor" on a like basis. We have such
         knowledge and experience in financial and business matters as to be
         capable of evaluating the merits and risks of purchasing the Notes and
         invest in or purchase securities similar to the Notes in the normal
         course of our business. We and any accounts for which we are acting are
         each aware that we may be required, and are each able, to bear the
         economic risk of our or its investment in the Notes for an indefinite
         period of time.

                                      E-1
<PAGE>
3.       We are purchasing the Notes for our own account, or for one or more
         investor accounts for which we are acting as a fiduciary or agent, in
         each case for investment, and not with a view to, or for offer or sale
         in connection with, any distribution thereof in violation of the
         Securities Act, subject to any requirement of law that the disposition
         of our property or the property of such investor account or accounts be
         at all times within our or their control and subject to our or their
         ability to resell such Notes pursuant to Rule 144A under the Securities
         Act ("Rule 144A") or any exemption from registration available under
         the Securities Act.

4.       We agree on our own behalf and on behalf of any investor account for
         which we are purchasing Notes to offer, sell or otherwise transfer such
         Notes prior to the date which is two years (or such other period that
         may hereafter be provided under Rule 144(k) under the Securities Act as
         permitting resales of restricted securities by non-affiliates without
         restriction) after the later of the date of original issue and the last
         date on which the Company or any affiliate of the Company was the owner
         of such Notes (or any predecessor thereof) (the "Resale Restriction
         Termination Date") only (a) to the Company, (b) pursuant to a
         registration statement which has been declared effective under the
         Securities Act, (c) for so long as the Notes are eligible for resale
         pursuant to Rule 144A to a person we reasonably believe is a "qualified
         institutional buyer" as defined in Rule 144A (a "QIB") that purchases
         for its own account or for the account of a QIB and to whom notice is
         given that the transfer is being made in reliance on Rule 144A, (d)
         outside the United States in an offshore transaction in accordance with
         Rule 904 under the Securities Act, (e) to an institutional "accredited
         investor" within the meaning of subparagraph (a)(1), (2), (3) or (7) of
         Rule 501 that is purchasing the Notes for its own account or for the
         account of such an institutional "accredited investor" for investment
         purposes only, and not with a view to, or for offer or sale in
         connection with, any distribution in violation of the Securities Act,
         or (f) pursuant to any other available exemption from the registration
         requirements of the Securities Act, subject in each of the foregoing
         cases to any requirement of law that the disposition of our property or
         the property of such investor account or accounts be at all times
         within our, its or their control and in each case in compliance with
         any applicable securities laws of any U.S. state or any other
         applicable jurisdiction. The foregoing restrictions on resale will not
         apply subsequent to the Resale Restriction Termination Date. If any
         resale or other transfer of the Notes is proposed to be made pursuant
         to clause (e) above prior to the Resale Restriction Termination Date,
         the transferor shall deliver a letter from the transferee substantially
         in the form of this letter to the Company and the Trustee, which shall
         provide, among other things, that the transferee is an institutional
         "accredited investor" within the meaning of subparagraph (a)(1), (2),
         (3) or (7) of Rule 501 and that it is acquiring such Notes for
         investment purposes and not for distribution in violation of the
         Securities Act. Each purchaser acknowledges that the Company and the
         Trustee reserve the right prior to the offer, sale or other transfer
         made prior to the Resale Termination Date to require the delivery of an
         opinion of counsel, certifications and/or other information
         satisfactory to the Company and the Trustee.

5.       We understand that the Notes will be delivered in registered form only
         and that the certificates delivered to us in respect of the Notes will
         contain a legend substantially to the following effect:

                                      E-2
<PAGE>
         THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
         AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS.
         NEITHER THIS SECURITY NOR ANY INTEREST OR PARTICIPATION HEREIN MAY BE
         REOFFERED, SOLD, ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR
         OTHERWISE DISPOSED OF IN THE ABSENCE OF SUCH REGISTRATION OR UNLESS
         SUCH TRANSACTION IS EXEMPT FROM, OR NOT SUBJECT TO, REGISTRATION. THE
         HOLDER OF THIS SECURITY BY ITS ACCEPTANCE HEREOF AGREES TO OFFER, SELL
         OR OTHERWISE TRANSFER THIS SECURITY, PRIOR TO THE DATE WHICH IS TWO
         YEARS (OR SUCH OTHER PERIOD THAT MAY HEREAFTER BE PROVIDED UNDER RULE
         144(K) UNDER THE SECURITIES ACT AS PERMITTING RESALES OF RESTRICTED
         SECURITIES BY NON-AFFILIATES WITHOUT RESTRICTION) AFTER THE LATER OF
         THE ORIGINAL ISSUE DATE HEREOF AND THE LAST DATE ON WHICH THE COMPANY
         OR ANY AFFILIATE OF THE COMPANY WAS THE OWNER OF THIS SECURITY (OR ANY
         PREDECESSOR OF THIS SECURITY) (THE "RESALE RESTRICTION TERMINATION
         DATE") ONLY (A) TO THE COMPANY, (B) PURSUANT TO A REGISTRATION
         STATEMENT WHICH HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT,
         (C) FOR SO LONG AS THIS SECURITY IS ELIGIBLE FOR RESALE PURSUANT TO
         RULE 144A UNDER THE SECURITIES ACT, IN THE UNITED STATES TO A PERSON IT
         REASONABLY BELIEVES IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN
         RULE 144A UNDER THE SECURITIES ACT) THAT PURCHASES FOR ITS OWN ACCOUNT
         OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS
         GIVEN THAT THE TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A UNDER
         THE SECURITIES ACT, (D) TO AN INSTITUTIONAL "ACCREDITED INVESTOR"
         WITHIN THE MEANING OF SUBPARAGRAPH (a)(1), (2), (3) OR (7) OF RULE 501
         UNDER THE SECURITIES ACT THAT IS ACQUIRING THIS SECURITY FOR ITS OWN
         ACCOUNT, OR FOR THE ACCOUNT OF SUCH AN INSTITUTIONAL "ACCREDITED
         INVESTOR," FOR INVESTMENT PURPOSES AND NOT WITH A VIEW TO, OR FOR OFFER
         OR SALE IN CONNECTION WITH, ANY DISTRIBUTION IN VIOLATION OF THE
         SECURITIES ACT, (E) OUTSIDE OF THE UNITED STATES IN AN OFFSHORE
         TRANSACTION IN ACCORDANCE WITH RULE 904 UNDER THE SECURITIES ACT OR (F)
         PURSUANT TO ANOTHER AVAILABLE EXEMPTION FROM THE REGISTRATION
         REQUIREMENTS OF THE SECURITIES ACT, SUBJECT TO THE COMPANY'S AND THE
         TRUSTEE'S RIGHT PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER TO REQUIRE
         THE DELIVERY OF AN OPINION OF COUNSEL, CERTIFICATIONS AND/OR OTHER
         INFORMATION SATISFACTORY TO EACH OF THEM, AND IN EACH OF THE FOREGOING
         CASES, A CERTIFICATE OF TRANSFER IN THE FORM APPEARING ON THIS SECURITY
         IS COMPLETED AND DELIVERED BY THE TRANSFEROR TO THE TRUSTEE AND IN EACH
         CASE IN ACCORDANCE WITH APPLICABLE SECURITIES LAWS OF ANY U.S. STATE OR
         ANY OTHER APPLICABLE JURISDICTION. THE HOLDER OF THIS SECURITY AGREES
         THAT IT WILL DELIVER TO EACH PERSON TO WHOM THIS SECURITY

                                       E-3
<PAGE>
         IS TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.
         THIS LEGEND WILL BE REMOVED UPON THE REQUEST OF THE HOLDER AFTER THE
         RESALE RESTRICTION TERMINATION DATE.

6.       If we are acquiring any of the Notes as a fiduciary or agent for one or
         more investor accounts, we represent that we have sole investment
         discretion with respect to each such account and we have full power to
         make the foregoing acknowledgments, representations, warranties and
         agreements on behalf of each such investor account.

                                      E-4
<PAGE>
                  You and the Company are entitled to rely upon this letter and
are irrevocably authorized to produce this letter or a copy hereof to any
interested party in any administrative or legal proceedings or official inquiry
with respect to the matters covered hereby.

_______________________________                  Dated: __________________, ____
[Insert Name of Accredited Investor]

By:_______________________________
Name:
Title:

                                      E-5
<PAGE>
                                    EXHIBIT F
                         FORM OF SUPPLEMENTAL INDENTURE
                          TO BE DELIVERED BY SUBSEQUENT
                                   GUARANTORS

         Supplemental Indenture (this "Supplemental Indenture"), dated as of
____, among ___________________ (the "Guaranteeing Subsidiary"), a subsidiary of
Orbital Sciences Corporation (or its permitted successor), a Delaware
corporation (the "Company"), the Company and U.S. Bank, N.A., as trustee under
the Indenture referred to below (the "Trustee").

                               W I T N E S S E T H

         WHEREAS, the Company has heretofore executed and delivered to the
Trustee an indenture (the "Indenture"), dated as of August 22, 2002, providing
for the issuance of 12% Second Priority Secured Notes due 2006 (the "Notes");

         WHEREAS, the Indenture provides that under certain circumstances the
Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental
indenture pursuant to which any newly-acquired or created Guarantor shall
unconditionally guarantee all of the Company's obligations under the Notes and
the Indenture on the terms and conditions set forth herein (the "Subsidiary
Guarantee"); and

         WHEREAS, pursuant to Section 9.1 of the Indenture, the Trustee is
authorized to execute and deliver this Supplemental Indenture.

         NOW THEREFORE, in consideration of the foregoing and for other good and
valuable consideration, the receipt of which is hereby acknowledged, the
Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the
equal and ratable benefit of the Holders of the Notes as follows:

         1. Capitalized Terms. Capitalized terms used herein without definition
shall have the meanings assigned to them in the Indenture.

         2. Agreement to Guarantee. The Guaranteeing Subsidiary irrevocably and
unconditionally guarantees the Guarantee Obligations, which include (i) the due
and punctual payment of interest on the overdue principal and premium, if any,
and (to the extent permitted by law) interest on any interest on the Notes, and
the due and punctual performance of all other obligations of the Company to the
Holders or the Trustee under the Notes, the Indenture, the Collateral Agreements
and the Note Registration Rights Agreement, all in accordance with the terms set
forth in Article X of the Indenture, and (ii) in case of any

                                      F-1
<PAGE>
extension of time of payment or renewal of any Notes or any of such other
obligations under the Notes, the Indenture, the Collateral Agreements and the
Note Registration Rights Agreement, that the same will be promptly paid in full
when due or performed in accordance with the terms of the extension or renewal,
whether at stated maturity, by acceleration, call for redemption, upon a Change
of Control Offer, an Asset Sale Offer, or otherwise, subject, however, in the
case of clauses (i) and (ii) above, to the limitations set forth in Section
10.12 of the Indenture.

         The obligations of Guaranteeing Subsidiary to the Holders and to the
Trustee pursuant to this Subsidiary Guarantee and the Indenture are expressly
set forth in Article X of the Indenture and reference is hereby made to such
Indenture for the precise terms of this Subsidiary Guarantee.

         No past, present or future, direct or indirect, stockholder, employee,
officer, director, agent or representative of the Company, the Guarantors or any
such successor entity, as such, shall have any liability for any Obligations of
the Company or the Guarantors under the Notes, the Guarantees or the Indenture
or for any claim based on, in respect of, or by reason of, such Obligations or
their creation, except in their capacity as an obligor or Guarantor of the Notes
in accordance with the Indenture.

         This is a continuing Guarantee and shall remain in full force and
effect and shall be binding upon the Guaranteeing Subsidiary and its successors
and assigns until full and final payment of all of the Company's obligations
under the Notes and Indenture or until released or defeased in accordance with
the Indenture and shall inure to the benefit of the successors and assigns of
the Trustee and the Holders, and, in the event of any transfer or assignment of
rights by any Holder or the Trustee, the rights and privileges herein conferred
upon that party shall automatically extend to and be vested in such transferee
or assignee, all subject to the terms and conditions hereof. This is a Guarantee
of payment and performance and not of collectibility.

         The obligations of the Guaranteeing Subsidiary under its Subsidiary
Guarantee shall be limited to the extent necessary to insure that it does not
constitute a fraudulent conveyance under applicable law.

         THE TERMS OF ARTICLE X OF THE INDENTURE ARE INCORPORATED HEREIN BY
REFERENCE.

         3. NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK
SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE, INCLUDING,
WITHOUT LIMITATION, SECTIONS 5-1401 AND 5-1402 OF THE NEW YORK GENERAL
OBLIGATIONS LAW.

                                      F-2
<PAGE>
         4. Counterparts. The parties may sign any number of copies of this
Supplemental Indenture. Each signed copy shall be an original, but all of them
together represent the same agreement.

         5. Effect of Headings. The Section headings herein are for convenience
only and shall not affect the construction hereof.

                                      F-3
<PAGE>
                           IN WITNESS WHEREOF, the parties hereto have caused
         this Supplemental Indenture to be duly executed and attested, all as of
         the date first above written.

                                             THE COMPANY:
                                             ORBITAL SCIENCES CORPORATION

                                             By:
                                                -----------------------------
                                                      Name:
                                                      Title:

                                             GUARANTEEING SUBSIDIARY:
                                             NAME:

                                             By:
                                                -----------------------------
                                                      Name:
                                                      Title:

                                             THE TRUSTEE:
                                             U.S. BANK, N.A.

                                             By:
                                                -----------------------------
                                                      Name:
                                                      Title:

<PAGE>
                                    EXHIBIT G

                         FORM OF INTERCREDITOR AGREEMENT

                                   [attached]

                                       G-1<PAGE>
                                                                     Exhibit 4.2

                                WARRANT AGREEMENT

            WARRANT AGREEMENT, dated as of August 22, 2002, by and between
Orbital Sciences Corporation, a Delaware corporation (the "COMPANY"), and U.S.
Bank, N.A., as warrant agent (the "WARRANT AGENT").

                                    RECITALS

            WHEREAS, the Company proposes to issue warrants (the "WARRANTS")
initially exercisable to purchase up to 122.23 shares of common stock, par value
$.01 per share, of the Company (the "COMMON STOCK" and, the Common Stock
issuable upon exercise of the Warrants being referred to herein as the "WARRANT
SHARES");

            WHEREAS, the Warrants are being issued in connection with the
offering (the "OFFERING") by the Company of 135,000 Units (the "UNITS"), each
consisting of $1,000 principal amount at maturity of the Company's 12% Second
Priority Secured Notes due 2006, Series A (the "NOTES") and one Warrant
initially exercisable to purchase 122.23 Warrant Shares at an exercise price of
$3.86 per Warrant Share; and

            WHEREAS, the Company desires the Warrant Agent to act on behalf of
the Company, and the Warrant Agent is willing so to act in connection with the
issuance of Warrant Certificates (as defined) and other matters as provided
herein.

            NOW, THEREFORE, in consideration of the promises and the mutual
agreements herein set forth, the parties hereto agree as follows:

SECTION 1.  CERTAIN DEFINITIONS.

            As used in this Agreement, the following terms shall have the
following respective meanings:

            "144A GLOBAL WARRANT" means a Global Warrant bearing the Private
Placement Legend that will be issued in an amount equal in total to the amount
of Warrants sold in reliance on Rule 144A.

            "AFFILIATE" of any Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control
<PAGE>
with such Person. For purposes of this definition, "control" (including,
with correlative meanings, the terms "controlling," "controlled by" and "under
common control with"), as used with respect to any Person shall mean the
possession, directly or indirectly, of the power to direct or cause the
direction of the management or policies of such specified Person, whether
through the ownership of voting securities, by agreement or otherwise; provided
that beneficial ownership of 10% or more of the voting securities of a Person
shall be deemed to be control.

            "APPLICABLE PROCEDURES" means, with respect to any transfer or
exchange of or for beneficial interests in any Global Warrant, the rules and
procedures of the Depositary that apply to such transfer or exchange.

            "BUSINESS DAY" means any day other than a Legal Holiday.

            "CHANGE OF CONTROL" has the meaning set forth in the Indenture.

            "CLOSING DATE" means the date hereof.

            "COMMISSION" means the Securities and Exchange Commission.

            "DEFINITIVE WARRANTS" means, individually and collectively, each of
the Warrants issued in definitive form in accordance with Sections 3.1(b) and
3.5 hereof, substantially in the form of Exhibit A hereto (but without the
Global Warrant Legend thereon and without the "Schedule of Exchanges of
Interests in the Global Warrant" attached thereto).

            "DEPOSITARY" means, with respect to the Warrants issuable or issued
in whole or in part in global form, the Person specified in Section 3.3 hereof
as the Depositary with respect to the Warrants, and any and all successors
thereto appointed as Depositary hereunder and having become such pursuant to the
applicable provision of the Indenture.

            "EVENT OF DEFAULT" has the meaning set forth in the Indenture.

            "EXCHANGE ACT" means the Securities Exchange Act of 1934, as
amended.

            "EXERCISE DATE" means the earliest of (i) th date on which a shelf
registration statement with respect to the Warrants and Warrant Shares is
declared effective under the Securities Act or (ii) the date on which the
Warrants and the Warrant Shares are freely transferable pursuant to Rule 144(k).

                                       2
<PAGE>
            "EXERCISE PRICE" means the purchase price per share of Common Stock
to be paid upon the exercise of each Warrant in accordance with the terms
hereof, which price shall initially be $3.86 per share, subject to adjustment
from time to time pursuant to Section 8 hereof.

            "GLOBAL WARRANTS" means, individually and collectively, each of the
Warrants issued in global form, in accordance with Sections 3.1(b) and 3.5
hereof, substantially in the form of Exhibit A attached hereto (including the
Global Warrant Legend thereon and the "Schedule of Exchanges of Interests in the
Global Warrant" attached thereto), and registered in the name of, the Depositary
or its nominee.

            "GLOBAL WARRANT LEGEND" means the legend set forth in Section
3.5(g)(ii), which is required to be placed on all Global Warrants issued under
this Warrant Agreement.

            "HOLDER" means a Person who is listed as the registered or record
holder of Warrants, Warrant Shares and any other securities issued or issuable
with respect to the Warrants or the Warrant Shares by way of a stock dividend or
stock split or in connection with a combination of shares, recapitalization,
merger, consolidation or other reorganization.

            "INDENTURE" means the indenture, dated the date hereof, by and among
the Company, the Guarantor (as set forth in the Indenture) and U.S. Bank, N.A.,
as trustee relating to the Notes.

            "INDIRECT PARTICIPANT" means a Person who holds a beneficial
interest in a Global Warrant through a Participant.

            "INITIAL PURCHASERS" means Jefferies & Company, Inc. and
Jefferies/Quarterdeck, LLC.

            "INSTITUTIONAL ACCREDITED INVESTOR" means an institution that is an
"accredited investor" as defined in Rule 501(a)(1), (2), (3) or (7) under the
Securities Act, who is not also a QIB.

            "LEGAL HOLIDAY" means a Saturday, a Sunday or a day on which banking
institutions in the City of New York, or the city in which the principal
corporate trust office of the Trustee is located, or at a place of payment are
authorized by law, regulation or executive order to remain closed. If a payment
date is a Legal Holiday, payment may be made at that place on the next
succeeding day that is not a Legal Holiday, and no interest shall accrue on such
payment for the intervening period.

                                       3
<PAGE>
            "MANDATORY SEPARATION DATE" means the earliest of (i) the date on
which a registration statement with respect to a registered exchange offer for
the Notes is declared effective under the Securities Act or (ii) the date on
which a shelf registration statement with respect to the Notes or the Warrants
and Warrant Shares is declared effective under the Securities Act.

            "OFFERING" means the offering by the Company of the Units.

            "OFFICER" means, with respect to any Person, the Chairman of the
Board, the Chief Executive Officer, the President, the Chief Operating Officer,
the Chief Financial Officer, the Treasurer, any Assistant Treasurer, the
Controller, the Secretary, any Assistant Secretary or any Vice-President of such
Person.

            "OPINION OF COUNSEL" means an opinion from legal counsel who is
reasonably acceptable to the Warrant Agent in form and substance reasonably
acceptable to the Warrant Agent. The counsel may be an employee of or counsel to
the Company, any subsidiary of the Company or the Warrant Agent.

            "PARTICIPANT" means, with respect to the Depositary, a Person who
has an account with the Depositary.

            "PERSON" means any corporation, individual, limited liability
company, joint stock company, joint venture, partnership, limited liability
partnership, unincorporated association, governmental regulatory entity,
country, state or political subdivision thereof, trust, municipality or other
entity.

            "PROSPECTUS" means the prospectus included in a Registration
Statement at the time such Registration Statement is declared effective, as
amended or supplemented by any prospectus supplement and by all other amendments
thereto, including post-effective amendments and all material incorporated by
reference into such Prospectus.

            "PRIVATE PLACEMENT LEGEND" means the legend set forth in Section
3.5(g)(i) to be placed on all Warrants issued under this Warrant Agreement
except where otherwise permitted by the provisions of this Warrant Agreement.

            "PURCHASE AGREEMENT" means that certain purchase agreement, dated as
of August 9, 2002 by and among the Company, the Guarantor (as set forth in the
Purchase Agreement) and the Initial Purchasers pursuant to which the Company
agreed to issue and sell the units, of which the Warrants form a part, to the
Initial Purchasers.

                                       4
<PAGE>
            "QIB" means a "qualified institutional buyer" as defined in Rule
144A.

            "REGISTRABLE SECURITIES" shall mean the Warrants, the Warrant Shares
and any other securities issued or issuable with respect to the Warrants or the
Warrant Shares by way of a stock dividend or stock split or in connection with a
combination of shares, recapitalization, merger, consolidation or other
reorganization that may not be sold without restriction under federal or state
securities law.

            "REGISTRATION STATEMENT" means "registration statement," as such
term is defined in Section 2(a)(8) of the Securities Act.

            "RESTRICTED DEFINITIVE WARRANT" means a Definitive Warrant bearing
the Private Placement Legend.

            "RESTRICTED GLOBAL WARRANT" means a Global Warrant bearing the
Private Placement Legend, including, without limitation, the 144A Global Warrant
and the Rule 501 Global Warrant.

            "RULE 144" means Rule 144 under the Securities Act, as such rule may
be amended from time to time, or any similar rule (other than Rule 144A) or
regulation hereafter adopted by the Commission.

            "RULE 144A" means Rule 144A under the Securities Act, as such rule
may be amended from time to time, or any similar rule (other than Rule 144) or
regulation hereafter adopted by the Commission.

            "RULE 501 GLOBAL WARRANT" means a Global Warrant bearing the Private
Placement Legend that will be issued in an amount equal in total to the amount
of Warrants sold to institutional "accredited investors" withing the meaning of
Rule 501(a)(1), (2), (3) or (7) of the Securities Act.

            "SECURITIES ACT" means the Securities Act of 1933, as amended.

            "SHELF REGISTRATION" means a Registration Statement filed for the
offer and sale of securities on a delayed or continuous basis pursuant to Rule
415 under the Securities Act relating to the Registrable Securities.

            "TRUSTEE" means the trustee under the Indenture.

            "UNRESTRICTED GLOBAL WARRANT" means a Global Warrant representing a
series of Warrants that do not bear the Private Placement Legend.

                                       5
<PAGE>
            "UNRESTRICTED DEFINITIVE WARRANT" means one or more Definitive
Warrants that do not bear and are not required to bear the Private Placement
Legend.

            "WARRANT REGISTRATION RIGHTS AGREEMENT" means the Warrant
Registration Rights Agreement, dated as of the date hereof, by and among the
Company and the Initial Purchasers, setting forth certain registration
obligations of the Company with respect to the Warrants and the Warrant Shares.

            All definitions herein (whether set forth herein directly or by
reference to definitions in other documents) shall be equally applicable to both
the singular and the plural forms of the terms defined. The words "hereof,"
"herein" or "hereunder" and words of similar import when used in this Agreement
shall refer to this Agreement as a whole and not to any particular provision of
this Agreement. Article and section references are to articles and sections of
this Agreement unless otherwise specified. The term "including" shall mean
"including without limitation."

SECTION 2.  APPOINTMENT OF WARRANT AGENT.

            The Company hereby appoints the Warrant Agent to act as agent for
the Company in accordance with the instructions set forth hereinafter in this
Agreement and the Warrant Agent hereby accepts such appointment.

SECTION 3.  ISSUANCE OF WARRANTS; WARRANT CERTIFICATES.

      3.1   FORM AND DATING.

            (a) General.

            The Warrants shall be substantially in the form of Exhibit A hereto
(the "WARRANT CERTIFICATES"). The Warrants may have additional notations,
legends or endorsements required by law, stock exchange rule or usage. Each
Warrant shall be dated the date of the countersignature of the Warrant Agent.

            The terms and provisions contained in the Warrants shall constitute,
and are hereby expressly made, a part of this Warrant Agreement. The Company and
the Warrant Agent, by their execution and delivery of this Warrant Agreement,
expressly agree to such terms and provisions and to be bound thereby. However,
to the extent any provision of any Warrant conflicts with the express provisions
of this Warrant Agreement, the provisions of this Warrant Agreement shall govern
and be controlling.

            (b) Global and Definitive Warrants.

                                       6
<PAGE>
            Global Warrants shall be substantially in the form of Exhibit A
attached hereto (including the Global Warrant Legend thereon and the "Schedule
of Exchanges of Interests in the Global Warrant" attached thereto). Definitive
Warrants shall be substantially in the form of Exhibit A attached hereto (but
without the Global Warrant Legend thereon and without the "Schedule of Exchanges
of Interests in the Global Warrant" attached thereto).

            Each Global Warrant shall represent such of the outstanding Warrants
as shall be specified therein and each shall provide that it shall represent the
number of outstanding Warrants from time to time endorsed thereon and that the
number of outstanding Warrants represented thereby may from time to time be
reduced or increased, as appropriate, to reflect exchanges and redemptions. Any
endorsement of a Global Warrant to reflect the amount of any increase or
decrease in the number of outstanding Warrants represented thereby shall be made
by the Warrant Agent in accordance with written instructions given by the Holder
thereof as required by Section 3.5 hereof.

      3.2   EXECUTION.

            An Officer shall sign the Warrants for the Company by manual or
facsimile signature.

            If the Officer whose signature is on a Warrant no longer holds that
office at the time a Warrant is countersigned, the Warrant shall nevertheless be
valid.

            A Warrant shall not be valid until countersigned by the manual
signature of the Warrant Agent. The signature shall be conclusive evidence that
the Warrant has been properly issued under this Warrant Agreement.

            The Warrant Agent shall, upon a written order of the Company signed
by an Officer (a "WARRANT COUNTERSIGNATURE ORDER"), countersign Warrants for
original issue up to the number stated in the recitals hereto.

            The Warrant Agent may appoint an agent acceptable to the Company to
countersign Warrants. Such an agent may countersign Warrants whenever the
Warrant Agent may do so. Each reference in this Warrant Agreement to a
countersignature by the Warrant Agent includes a countersignature by such agent.
Such an agent has the same rights as the Warrant Agent to deal with the Company
or an Affiliate of the Company.

                                       7
<PAGE>
      3.3   WARRANT REGISTRAR.

            The Company shall maintain an office or agency where Warrants may be
presented for registration of transfer or for exchange ("WARRANT REGISTRAR").
The Warrant Registrar shall keep a register of the Warrants and of their
transfer and exchange. The Company may appoint one or more co-Warrant
Registrars. The term "Warrant Registrar" includes any co-Warrant Registrar. The
Company may change any Warrant Registrar without notice to any Holder. The
Company shall notify the Warrant Agent in writing of the name and address of any
agent not a party to this Warrant Agreement. If the Company fails to appoint or
maintain another entity as Warrant Registrar, the Warrant Agent shall act as
such. The Company or any of its subsidiaries may act as Warrant Registrar.

            The Company initially appoints The Depository Trust Company ("DTC")
to act as Depositary with respect to the Global Warrants.

            The Company initially appoints the Warrant Agent to act as the
Warrant Registrar with respect to the Global Warrants.

      3.4   HOLDER LISTS.

            The Warrant Agent shall preserve in as current a form as is
reasonably practicable the most recent list available to it of the names and
addresses of all Holders. If the Warrant Agent is not the Warrant Registrar, the
Company shall promptly furnish to the Warrant Agent at such times as the Warrant
Agent may request in writing, a list in such form and as of such date as the
Warrant Agent may reasonably require of the names and addresses of the Holders.

      3.5   TRANSFER AND EXCHANGE.

            (a) Transfer and Exchange of Global Warrants.

            A Global Warrant may not be transferred as a whole except by the
Depositary to a nominee of the Depositary, by a nominee of the Depositary to the
Depositary or to another nominee of the Depositary, or by the Depositary or any
such nominee to a successor Depositary or a nominee of such successor
Depositary. All Global Warrants will be exchanged by the Company for Definitive
Warrants if (i) the Company delivers to the Warrant Agent written notice from
the Depositary that it is unwilling or unable to continue to act as Depositary
or that it is no longer a clearing agency registered under the Exchange Act and,
in either case, a successor Depositary is not appointed by the Company within
120 days after the date of such notice from the Depositary, (ii) the Company in
its sole discretion determines that the Global Warrants (in whole but not in
part) should be exchanged for Definitive

                                       8
<PAGE>
Warrants which the Company will provide to the Warrant Agent and delivers a
written notice to such effect to the Warrant Agent or (iii) an Event of Default
under the Indenture of which an officer of the Warrant Agent has actual notice
has occurred and is continuing and the Warrant Registrar has received a request
from DTC to issue Definitive Warrants. Upon the occurrence of any of the events
in clauses (i), (ii) or (iii) above of this Section 3.5(a), Definitive Warrants
shall be issued in such names as the Depositary shall instruct the Warrant Agent
in writing. Global Warrants also may be exchanged or replaced, in whole or in
part, as provided in Sections 3.6 and 3.7 hereof. A Global Warrant may not be
exchanged for another Warrant other than as provided in this Section 3.5(a);
provided, however, that beneficial interests in a Global Warrant may be
transferred and exchanged as provided in Section 3.5(b) or (c) hereof.

            (b) Transfer and Exchange of Beneficial Interests in the Global
Warrants.

            The transfer and exchange of beneficial interests in the Global
Warrants shall be effected through the Depositary, in accordance with the
provisions of this Warrant Agreement and the Applicable Procedures. Beneficial
interests in the Restricted Global Warrants shall be subject to restrictions on
transfer comparable to those set forth herein to the extent required by the
Securities Act. Transfers of beneficial interests in the Global Warrants also
shall require compliance with either subparagraph (i) or (ii) below, as
applicable, as well as one or more of the other following subparagraphs, as
applicable:

                (i) Transfer of Beneficial Interests in the Same Global Warrant.
        Beneficial interests in any Restricted Global Warrant may be transferred
        to Persons who will take delivery thereof in the form of a beneficial
        interest in the same Restricted Global Warrant in accordance with the
        transfer restrictions set forth in the Private Placement Legend.
        Beneficial interests in any Unrestricted Global Warrant may be delivered
        to Persons who will take delivery thereof in the form of a beneficial
        interest in an Unrestricted Global Warrant. No written orders or
        instructions shall be required to be delivered to the Warrant Registrar
        to effect the transfers described in this Section 3.5(b)(i).

                (ii) All Other Transfers and Exchanges of Beneficial Interests
        in Global Warrants. In connection with all transfers and exchanges of
        beneficial interests that are not subject to Section 3.5(b)(i) above,
        the transferor of such beneficial interest must deliver to the Warrant
        Registrar either (A) (1) a written order from a Participant or an
        Indirect Participant given to the Depositary in accordance with the
        Applicable Procedures directing the Depositary to credit or cause to be
        credited a beneficial interest

                                       9
<PAGE>
      in another Global Warrant in an amount equal to the beneficial interest to
      be transferred or exchanged and (2) instructions given in accordance with
      the Applicable Procedures containing information regarding the Participant
      account to be credited with such increase or (B) (1) a written order from
      a Participant or an Indirect Participant given to the Depositary in
      accordance with the Applicable Procedures directing the Depositary to
      cause to be issued a Definitive Warrant representing the number of
      Warrants equal to the number of Warrants represented by the beneficial
      interest to be transferred or exchanged and (2) instructions given by the
      Depositary to the Warrant Registrar containing information regarding the
      Person in whose name such Definitive Warrant shall be registered. Upon
      effectiveness of the Registration Statement by the Company in accordance
      with Section 3.5(f) hereof, the requirements of this Section 3.5(b)(ii)
      shall be deemed to have been satisfied upon receipt by the Warrant
      Registrar of a certification required by the Company in connection with
      such Registration Statement delivered by the Holder of such beneficial
      interests in the Restricted Global Warrants. Upon satisfaction of all of
      the requirements for transfer or exchange of beneficial interests in
      Global Warrants contained in this Agreement and the Warrants or otherwise
      applicable under the Securities Act, the Warrant Agent shall adjust the
      principal amount of the relevant Global Warrant(s) pursuant to Section
      3.5(h) hereof.

                 (iii) Transfer of Beneficial Interests to Another Restricted
      Global Warrant. A beneficial interest in any Restricted Global Warrant may
      be transferred to a Person who will take delivery thereof in the form of a
      beneficial interest in another Restricted Global Warrant if the transfer
      complies with the requirements of Section 3.5(b)(ii) hereof and the
      Warrant Registrar receives the following:

                        (A) if the transferee will take delivery in the form of
            a beneficial interest in the 144A Global Warrant, then the
            transferor must deliver a certificate in the form of Exhibit B
            hereto, including the certifications in item (1) thereof; and

                        (B) if the transferee will take delivery in the form of
            a beneficial interest in the Rule 501 Global Warrant, then the
            transferor must deliver a certificate in the form of Exhibit B
            hereto, including the certifications, certificates and Opinion of
            Counsel required by item (2) thereof, if applicable.

                 (iv) Transfer and Exchange of Beneficial Interests in a
      Restricted Global Warrant for Beneficial Interests in the Unrestricted
      Global Warrant. A beneficial interest in any Restricted Global Warrant may
      be

                                       10
<PAGE>
      exchanged by any holder thereof for a beneficial interest in an
      Unrestricted Global Warrant or transferred to a Person who will take
      delivery thereof in the form of a beneficial interest in an Unrestricted
      Global Warrant if the exchange or transfer complies with the requirements
      of Section 3.5(b)(ii) hereof and:

                        (A) such transfer is effected pursuant to a Registration
            Statement in accordance with this Agreement; or

                        (B) the Warrant Registrar receives the following:

                                    (1) if the holder of such beneficial
                        interest in a Restricted Global Warrant proposes to
                        exchange such beneficial interest for a beneficial
                        interest in an Unrestricted Global Warrant, a
                        certificate from such holder in the form of Exhibit C
                        hereto, including the certifications in item (1)(a)
                        thereof; or

                                    (2) if the holder of such beneficial
                        interest in a Restricted Global Warrant proposes to
                        transfer such beneficial interest to a Person who will
                        take delivery thereof in the form of a beneficial
                        interest in an Unrestricted Global Warrant, a
                        certificate from such holder in the form of Exhibit B
                        hereto, including the certifications in item (4)
                        thereof;

            and, in each such case set forth in this subparagraph (B), if the
            Warrant Registrar so requests or if the Applicable Procedures so
            require, an Opinion of Counsel in form reasonably acceptable to the
            Warrant Registrar to the effect that such exchange or transfer is in
            compliance with the Securities Act and that the restrictions on
            transfer contained herein and in the Private Placement Legend are no
            longer required in order to maintain compliance with the Securities
            Act.

            If any such transfer or exchange is effected pursuant to
      subparagraph (A) or (B) above of this Section 3.5(b)(iv) at a time when an
      Unrestricted Global Warrant has not yet been issued, the Company shall
      issue and, upon receipt of an Warrant Countersignature Order in accordance
      with Section 3.2 hereof, the Warrant Agent shall countersign one or more
      Unrestricted Global Warrants representing the aggregate number of Warrants
      equal to the aggregate number Warrants represented by the beneficial
      interests transferred or exchanged pursuant to such subparagraph (A) or
      (B) above.

                                       11
<PAGE>
                 (c) Transfer and Exchange of Beneficial Interests for
Definitive Warrants.

                        (i) Beneficial Interests in Restricted Global Warrants
            to Restricted Definitive Warrants. If any holder of a beneficial
            interest in a Restricted Global Warrant proposes to exchange such
            beneficial interest for a Restricted Definitive Warrant or to
            transfer such beneficial interest to a Person who will take delivery
            thereof in the form of a Restricted Definitive Warrant, then,
            following satisfaction of the conditions set forth in Section
            3.5(b)(ii) hereof, and upon receipt by the Warrant Registrar of the
            following documentation:

                        (A) if the holder of such beneficial interest in a
                  Restricted Global Warrant proposes to exchange such beneficial
                  interest for a Restricted Definitive Warrant, a certificate
                  from such holder in the form of Exhibit C hereto, including
                  the certifications in item (2)(a) thereof;

                        (B) if such beneficial interest is being transferred to
                  a QIB in accordance with Rule 144A, a certificate from the
                  transferor in the form of Exhibit B hereto, including the
                  certifications in item (1) thereof;

                        (C) if such beneficial interest is being transferred to
                  an Institutional Accredited Investor in reliance on an
                  exemption from the registration requirements of the Securities
                  Act, a certificate from the transferor in the form of Exhibit
                  B hereto, including the certifications, certificates and
                  Opinion of Counsel required by item (2) thereof, if
                  applicable;

                        (D) if such beneficial interest is being transferred
                  pursuant to an exemption from the registration requirements of
                  the Securities Act in accordance with Rule 144, a certificate
                  from the transferor in the form of Exhibit B hereto, including
                  the certifications in item (3)(a) thereof;

                        (E) if such beneficial interest is being transferred to
                  the Company or any of its Subsidiaries, a certificate from the
                  transferor in the form of Exhibit B hereto, including the
                  certifications in item (3)(b) thereof; or

                        (F) if such beneficial interest is being transferred
                  pursuant to an effective registration statement under the
                  Securities

                                       12
<PAGE>
                  Act, a certificate from the transferor in the form of Exhibit
                  B hereto, including the certifications in item (3)(c) thereof,

            the Warrant Agent shall cause, in accordance with the standing
            instructions and procedures existing between the Depositary and the
            Warrant Agent, the number of Warrants represented by the Restricted
            Global Warrant to be reduced pursuant to Section 3.5(h) hereof by
            the number of Warrants to be represented by the Restricted
            Definitive Warrant, and the Company shall execute, and the Warrant
            Agent pursuant to Section 3.2 hereof shall countersign and deliver
            to the Person designated in the instructions, one or more Restricted
            Definitive Warrants representing the aggregate number of Warrants
            exchanged or transferred. Any Restricted Definitive Warrant issued
            in exchange for a beneficial interest in a Restricted Global Warrant
            pursuant to this Section 3.5(c)(i) shall be registered in such name
            or names and in such authorized denomination or denominations as the
            holder of such beneficial interest shall instruct the Warrant
            Registrar through written instructions from the Depositary and the
            Participant or Indirect Participant. The Warrant Agent shall deliver
            such Restricted Definitive Warrants to the Persons in whose names
            such Warrants are so registered. Any Restricted Definitive Warrant
            issued in exchange for a beneficial interest in a Restricted Global
            Warrant pursuant to this Section 3.5(c)(i) shall bear the Private
            Placement Legend and shall be subject to all restrictions on
            transfer contained therein.

                        (ii) Beneficial Interests in Restricted Global Warrants
            to Unrestricted Definitive Warrants. A holder of a beneficial
            interest in a Restricted Global Warrant may exchange such beneficial
            interest for an Unrestricted Definitive Warrant or may transfer such
            beneficial interest to a Person who will take delivery thereof in
            the form of an Unrestricted Definitive Warrant, only if the exchange
            or transfer complies with the requirements of Section 3.5(b)(ii)
            hereof and:

                            (A) such transfer is effected pursuant to the
                  Registration Statement in accordance with the Warrant
                  Registration Rights Agreement; or

                            (B) the Warrant Registrar receives the following:

                              (1) if the holder of such beneficial interest in a
                        Restricted Global Warrant proposes to exchange such
                        beneficial interest for an Unrestricted Definitive
                        Warrant, a certificate from such holder in the form of
                        Exhibit C hereto, including the certifications in item
                        (1)(b) thereof; or

                                       13
<PAGE>
                              (2) if the holder of such beneficial interest in a
                        Restricted Global Warrant proposes to transfer such
                        beneficial interest to a Person who will take delivery
                        thereof in the form of an Unrestricted Definitive
                        Warrant, a certificate from such holder in the form of
                        Exhibit B hereto, including the certifications in item
                        (4) thereof;

                  and, in each such case set forth in this subparagraph (B), if
                  the Warrant Registrar so requests or if the Applicable
                  Procedures so require, an Opinion of Counsel in form
                  reasonably acceptable to the Warrant Registrar to the effect
                  that such exchange or transfer is in compliance with the
                  Securities Act and that the restrictions on transfer contained
                  herein and in the Private Placement Legend are no longer
                  required in order to maintain compliance with the Securities
                  Act.

            Upon satisfaction of the conditions set forth above in this
            paragraph 3.5(c)(ii), the Warrant Agent shall cause, in accordance
            with the standing instructions and procedures existing between the
            Depositary and the Warrant Agent, the number of Warrants represented
            by the Restricted Global Warrant to be reduced pursuant to Section
            3.5(h) hereof by the number of Warrants to be represented by the
            Unrestricted Definitive Warrant, and the Company shall execute, and
            the Warrant Agent pursuant to Section 3.2 hereof shall countersign
            and deliver to the Person designated in the instructions, one or
            more Unrestricted Definitive Warrants representing the aggregate
            number of Warrants exchanged or transferred. Any Unrestricted
            Definitive Warrant issued in exchange for a beneficial interest in a
            Restricted Global Warrant pursuant to this Section 3.5(c)(ii) shall
            be registered in such name or names and in such authorized
            denomination or denominations as the holder of such beneficial
            interest shall instruct the Warrant Registrar through written
            instructions from the Depositary and the Participant or Indirect
            Participant. The Warrant Agent shall deliver such Unrestricted
            Definitive Warrants to the Persons in whose names such Warrants are
            so registered. Any Unrestricted Definitive Warrant issued in
            exchange for a beneficial interest in a Restricted Global Warrant
            pursuant to this Section 3.5(c)(i) shall not bear the Private
            Placement Legend.

                        (iii) Beneficial Interests in Unrestricted Global
            Warrants to Unrestricted Definitive Warrants. If any Holder of a
            beneficial interest in an Unrestricted Global Warrant proposes to
            exchange such beneficial interest for a Definitive Warrant or to
            transfer such beneficial interest to a Person who will take delivery
            thereof in the form of an Unrestricted Definitive

                                       14
<PAGE>
            Warrant, then, upon satisfaction of the conditions set forth in
            Section 3.5(b)(ii) hereof, the Warrant Agent shall cause the number
            of Warrants represented by the Unrestricted Global Warrant to be
            reduced pursuant to Section 3.5(h) hereof by the number of Warrants
            to be represented by the Unrestricted Definitive Warrant, and the
            Company shall execute, and the Warrant Agent shall countersign and
            deliver to the Person designated in the instructions, one or more
            Unrestricted Definitive Warrants representing the aggregate number
            of Warrants exchanged or transferred. Any Unrestricted Definitive
            Warrant issued in exchange for a beneficial interest in an
            Unrestricted Global Warrant pursuant to this Section 3.5(c)(iii)
            shall be registered in such name or names and in such authorized
            denomination or denominations as the holder of such beneficial
            interest shall instruct the Warrant Registrar through written
            instructions from the Depositary and the Participant or Indirect
            Participant. The Warrant Agent shall deliver such Unrestricted
            Definitive Warrants to the Persons in whose names such Warrants are
            so registered. Any Unrestricted Definitive Warrant issued in
            exchange for a beneficial interest in an Unrestricted Global Warrant
            pursuant to this Section 3.5(c)(iii) shall not bear the Private
            Placement Legend.

               (d) Transfer and Exchange of Definitive Warrants for Beneficial
Interests.

                        (i) Restricted Definitive Warrants to Beneficial
            Interests in Restricted Global Warrants. If any Holder of a
            Restricted Definitive Warrant proposes to exchange such Restricted
            Definitive Warrant for a beneficial interest in a Restricted Global
            Warrant or to transfer such Restricted Definitive Warrant to a
            Person who will take delivery thereof in the form of a beneficial
            interest in a Restricted Global Warrant, then, upon receipt by the
            Warrant Registrar of the following documentation:

                            (A) if the Holder of such Restricted Definitive
                  Warrant proposes to exchange such Warrant for a beneficial
                  interest in a Restricted Global Warrant, a certificate from
                  such Holder in the form of Exhibit C hereto, including the
                  certifications in item (2)(b) thereof;

                            (B) if such Restricted Definitive Warrant is being
                  transferred to a QIB in accordance with Rule 144A, a
                  certificate from the transferor in the form of Exhibit B
                  hereto, including the certifications in item (1) thereof;

                            (C) if such Restricted Definitive Warrant is being
                  transferred to an Institutional Accredited Investor, a
                  certificate from

                                       15
<PAGE>
                  the transferor in the form of Exhibit B hereto, including the
                  certifications, certificates and Opinion of Counsel required
                  by item (2) thereof, if applicable;

                            (D) if such Restricted Definitive Warrant is being
                  transferred pursuant to an exemption from the registration
                  requirements of the Securities Act in accordance with Rule
                  144, a certificate from the transferor in the form of Exhibit
                  B hereto, including the certifications in item (3)(a) thereof;

                            (E) if such Restricted Definitive Warrant is being
                  transferred to the Company or any of its Subsidiaries, a
                  certificate from the transferor in the form of Exhibit B
                  hereto, including the certifications in item (3)(b) thereof;
                  or

                            (F) if such Restricted Definitive Warrant is being
                  transferred pursuant to an effective registration statement
                  under the Securities Act, a certificate from the transferor in
                  the form of Exhibit B hereto, including the certifications in
                  item (3)(c) thereof,

            the Warrant Agent shall cancel the Restricted Definitive Warrant,
            and shall cause the number of Warrants represented by the
            appropriate Restricted Global Warrant to be increased pursuant to
            Section 3.5(h) hereof by an amount equal to the aggregate number of
            Warrants represented by the Restricted Definitive Warrant.

                        (ii) Restricted Definitive Warrants to Beneficial
            Interests in Unrestricted Global Warrants. A Holder of a Restricted
            Definitive Warrant may exchange such Restricted Definitive Warrant
            for a beneficial interest in an Unrestricted Global Warrant or
            transfer such Restricted Definitive Warrant to a Person who will
            take delivery thereof in the form of a beneficial interest in an
            Unrestricted Global Warrant only if:

                            (A) such transfer is effected pursuant to a
                  Registration Statement in accordance with this Agreement; or

                            (B) the Warrant Registrar receives the following:

                              (1) if the Holder of such Restricted Definitive
                        Warrant proposes to exchange such Warrants for a
                        beneficial interest in the Unrestricted Global Warrant,
                        a certificate from such Holder in the form of Exhibit C
                        hereto, including the certifications in item (1)(c)
                        thereof; or

                                       16
<PAGE>
                              (2) if the Holder of such Restricted Definitive
                        Warrant proposes to transfer such Warrants to a Person
                        who will take delivery thereof in the form of a
                        beneficial interest in the Unrestricted Global Warrant,
                        a certificate from such Holder in the form of Exhibit B
                        hereto, including the certifications in item (4)
                        thereof;

                  and, in each such case set forth in this subparagraph (B), if
                  the Warrant Registrar so requests or if the Applicable
                  Procedures so require, an Opinion of Counsel in form
                  reasonably acceptable to the Warrant Registrar to the effect
                  that such exchange or transfer is in compliance with the
                  Securities Act and that the restrictions on transfer contained
                  herein and in the Private Placement Legend are no longer
                  required in order to maintain compliance with the Securities
                  Act.

            Upon satisfaction of the conditions of any of the subparagraphs in
            this Section 3.5(d)(ii), the Warrant Agent shall cancel the
            Restricted Definitive Warrant, and shall cause the number of
            Warrants represented by the appropriate Unrestricted Global Warrant
            to be increased pursuant to Section 3.5(h) hereof by an amount equal
            to the aggregate number of Warrants represented by the Restricted
            Definitive Warrant.

                        (iii) Unrestricted Definitive Warrants to Beneficial
            Interests in Unrestricted Global Warrants. A Holder of an
            Unrestricted Definitive Warrant may exchange such Unrestricted
            Definitive Warrant for a beneficial interest in an Unrestricted
            Global Warrant or transfer such Unrestricted Definitive Warrant to a
            Person who will take delivery thereof in the form of a beneficial
            interest in an Unrestricted Global Warrant at any time. Upon receipt
            of a written request for such an exchange or transfer from the
            Holder, the Warrant Agent shall cancel the Unrestricted Definitive
            Warrant, and shall cause the number of Warrants represented by the
            appropriate Unrestricted Global Warrant to be increased pursuant to
            Section 3.5(h) hereof by an amount equal to the aggregate number of
            Warrants represented by the Unrestricted Definitive Warrant.

                        (iv) If any such exchange or transfer from a Definitive
            Warrant to a beneficial interest in an Unrestricted Global Warrant
            is effected pursuant to subparagraphs (ii)(B) or (iii) above of this
            Section 3.5(d) at a time when an Unrestricted Global Warrant has not
            yet been issued, the Company shall issue and, upon receipt of an
            Warrant Countersignature Order in accordance with Section 3.2
            hereof, the Warrant Agent shall countersign one or more Unrestricted
            Global Warrants representing the aggregate number

                                       17
<PAGE>
            of Warrants equal to the aggregate number of Warrants represented by
            the Definitive Warrants so exchanged or transferred.

               (e) Transfer and Exchange of Definitive Warrants for Definitive
Warrants.

                        (i) Upon written request by a Holder of Definitive
            Warrants and such Holder's compliance with the provisions of this
            Section 3.5(e), the Warrant Registrar shall register the transfer or
            exchange of Definitive Warrants. Prior to such registration of
            transfer or exchange, the requesting Holder shall present or
            surrender to the Warrant Registrar the Definitive Warrants duly
            endorsed or accompanied by a written instruction of transfer in form
            satisfactory to the Warrant Registrar duly executed by such Holder
            or by its attorney, duly authorized in writing. In addition, the
            requesting Holder shall provide any additional certifications,
            documents and information, as applicable, required pursuant to the
            following provisions of this Section 3.5(e).

                        (ii) Restricted Definitive Warrants to Restricted
            Definitive Warrants. Any Restricted Definitive Warrant may be
            transferred to and registered in the name of a Person who will take
            delivery thereof in the form of a Restricted Definitive Warrant if
            the transfer complies with the requirements of Section 3.5(b)(ii)
            hereof and the Warrant Registrar receives the following:

                            (A) if the transfer will be made pursuant to Rule
                  144A, a certificate from the transferor in the form of Exhibit
                  B hereto, including the certifications in item (1) thereof;

                            (B) if the transfer will be made to an Institutional
                  Accredited Investor, a certificate from the transferor in the
                  form of Exhibit B hereto, including the certifications,
                  certificates and Opinion of Counsel required by item (2)
                  thereof, if applicable; or

                            (C) if the transfer will be made pursuant to any
                  other exemption from the registration requirements of the
                  Securities Act, a certificate from the transferor in the form
                  of Exhibit B hereto, including the certifications,
                  certificates and Opinion of Counsel required by item (3)
                  thereof, if applicable.

                        (iii) Restricted Definitive Warrants to Unrestricted
            Definitive Warrants. Any Restricted Definitive Warrant may be
            exchanged by the Holder thereof for an Unrestricted Definitive
            Warrant or transferred to a Person who will take delivery thereof in
            the form of an Unrestricted

                                       18
<PAGE>
            Definitive Warrant if the transfer complies with the requirements of
            Section 3.5(b)(ii) hereof and:

                            (A) any such transfer is effected pursuant to the
                  Registration Statement in accordance with the Warrant
                  Registration Rights Agreement; or

                            (B) the Warrant Registrar receives the following:

                              (1) if the Holder of such Restricted Definitive
                        Warrants proposes to exchange such Restricted Definitive
                        Warrant for an Unrestricted Definitive Warrant, a
                        certificate from such Holder in the form of Exhibit C
                        hereto, including the certifications in item (1)(d)
                        thereof; or

                              (2) if the Holder of such Restricted Definitive
                        Warrants proposes to transfer such Restricted Definitive
                        Warrant to a Person who will take delivery thereof in
                        the form of an Unrestricted Definitive Warrant, a
                        certificate from such Holder in the form of Exhibit B
                        hereto, including the certifications in item (4)
                        thereof;

                  and, in each such case set forth in this subparagraph (B), if
                  the Warrant Registrar so requests, an Opinion of Counsel in
                  form reasonably acceptable to the Company to the effect that
                  such exchange or transfer is in compliance with the Securities
                  Act and that the restrictions on transfer contained herein and
                  in the Private Placement Legend are no longer required in
                  order to maintain compliance with the Securities Act.

                        (iv) Unrestricted Definitive Warrants to Unrestricted
            Definitive Warrants. A Holder of an Unrestricted Definitive Warrant
            may transfer such Unrestricted Definitive Warrant to a Person who
            will take delivery thereof in the form of an Unrestricted Definitive
            Warrant. Upon receipt of a written request to register such a
            transfer, the Warrant Registrar shall register the Unrestricted
            Definitive Warrant pursuant to the instructions from the Holder
            thereof.

                 (f) Registration Statement.

            Upon the effectiveness of a Registration Statement, the Company
shall issue and, upon receipt of a Warrant Countersignature Order in accordance
with Section 3.2, the Warrant Agent shall countersign (i) one or more
Unrestricted Global Warrants representing the number of Warrants equal to the
number of Warrants represented by the beneficial interests in the Restricted
Global Warrants sold under

                                       19
<PAGE>
such Registration Statement and (ii) the number of Unrestricted Definitive
Warrants equal to the number of Restricted Definitive Warrants sold under such
Registration Statement. Concurrently with the issuance of such Warrants, the
Warrant Agent shall cause the number of Warrants represented by the applicable
Restricted Global Warrants to be reduced accordingly pursuant to Section 3.5(h)
hereof, and the Company shall execute and the Warrant Agent shall countersign
and deliver to the Persons designated by the Holders of Definitive Warrants so
accepted Definitive Warrants in the appropriate amount.

            (g) Legends.

            The following legends shall appear on the reverse of all Global
Warrants and all Definitive Warrants issued under this Warrant Agreement unless
specifically stated otherwise in the applicable provisions of this Warrant
Agreement.

                 (i) Private Placement Legend.

                        (A) Except as permitted by subparagraph (B) of this
            Section 3.5(g), each Global Warrant and each Definitive Warrant (and
            all Warrants issued in exchange therefor or substitution thereof)
            shall bear a legend in substantially the following form:

                  "THIS SECURITY AND THE SECURITIES ISSUABLE UPON EXERCISE OF
            THIS SECURITY HAVE NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT
            OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY
            NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED WITHIN THE
            UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S. PERSONS,
            EXCEPT AS SET FORTH IN THE NEXT SENTENCE HEREOF. BY ITS ACQUISITION
            HEREOF OR OF A BENEFICIAL INTEREST HEREIN, THE HOLDER:

                  (1) REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL
            BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT)(A "QIB")
            OR (B) IT IS AN INSTITUTIONAL "ACCREDITED INVESTOR" (AS DEFINED IN
            RULE 501(A)(1), (2), (3) OR (7) OF REGULATION D UNDER THE SECURITIES
            ACT (AN "IAI"),

                  (2) AGREES THAT IT WILL NOT RESELL OR OTHERWISE TRANSFER THIS
            SECURITY EXCEPT (A) TO THE COMPANY OR ANY OF ITS SUBSIDIARIES, (B)
            TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QIB PURCHASING
            FOR ITS OWN ACCOUNT OR FOR THE

                                       20
<PAGE>
            ACCOUNT OF A QIB IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE
            144A, (C) IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144
            UNDER THE SECURITIES ACT, (D) TO AN IAI THAT, PRIOR TO SUCH
            TRANSFER, FURNISHES THE WARRANT AGENT A SIGNED LETTER CONTAINING
            CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE TRANSFER OF
            THIS SECURITY (THE FORM OF WHICH CAN BE OBTAINED FROM THE WARRANT
            AGENT) AND, IF THE COMPANY SO REQUESTS, AN OPINION OF COUNSEL
            ACCEPTABLE TO THE COMPANY THAT SUCH TRANSFER IS IN COMPLIANCE WITH
            THE SECURITIES ACT, (E) IN ACCORDANCE WITH ANOTHER EXEMPTION FROM
            THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT (AND BASED UPON
            AN OPINION OF COUNSEL ACCEPTABLE TO THE COMPANY) OR (F) PURSUANT TO
            AN EFFECTIVE REGISTRATION STATEMENT AND, IN EACH CASE, IN ACCORDANCE
            WITH THE APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED
            STATES OR ANY OTHER APPLICABLE JURISDICTION, AND

                  (3)AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THIS
            WARRANT OR AN INTEREST HEREIN IS TRANSFERRED A NOTICE SUBSTANTIALLY
            TO THE EFFECT OF THIS LEGEND.

                        (B) Notwithstanding the foregoing, any Global Warrant or
            Definitive Warrant issued pursuant to subparagraphs (b)(iv),
            (c)(ii), (c)(iii), (d)(ii), (d)(iii), (e)(ii), (e)(iii) or (f) of
            this Section 3.5 (and all Warrants issued in exchange therefor or
            substitution thereof) shall not bear the Private Placement Legend.

               (ii) Global Warrant Legend. Each Global Warrant shall bear a
      legend in substantially the following form:

                  "THIS GLOBAL WARRANT IS HELD BY THE DEPOSITARY (AS DEFINED IN
      THE WARRANT AGREEMENT GOVERNING THIS WARRANT) OR ITS NOMINEE IN CUSTODY
      FOR THE BENEFIT OF THE BENEFICIAL OWNERS HEREOF, AND IS NOT TRANSFERABLE
      TO ANY PERSON UNDER ANY CIRCUMSTANCES EXCEPT THAT (I) THE WARRANT AGENT
      MAY MAKE SUCH NOTATIONS HEREON AS MAY BE REQUIRED PURSUANT TO SECTION 3.5
      OF THE WARRANT AGREEMENT, (II) THIS GLOBAL WARRANT MAY BE EXCHANGED IN
      WHOLE BUT NOT IN PART PURSUANT TO SECTION 3.5(a) OF THE WARRANT AGREEMENT,

                                       21
<PAGE>
        (III) THIS GLOBAL WARRANT MAY BE DELIVERED TO THE WARRANT AGENT FOR
        CANCELLATION PURSUANT TO SECTION 3.8 OF THE WARRANT AGREEMENT AND (IV)
        THIS GLOBAL WARRANT MAY BE TRANSFERRED TO A SUCCESSOR DEPOSITARY WITH
        THE PRIOR WRITTEN CONSENT OF THE COMPANY."

                      (iii)  Unit Legend.  Each Warrant issued prior to the
        Mandatory Separation Date shall bear a legend in substantially the
        following form:

                      "THE WARRANTS EVIDENCED BY THIS CERTIFICATE ARE INITIALLY
        ISSUED AS PART OF AN ISSUANCE OF 135,000 UNITS (THE "UNITS"), EACH OF
        WHICH CONSISTS OF $1,000 PRINCIPAL AMOUNT AT MATURITY OF THE 12% SECOND
        PRIORITY SECURED NOTES DUE 2006, SERIES A, OF THE COMPANY (THE "NOTES")
        AND ONE WARRANT INITIALLY ENTITLING THE HOLDER THEREOF TO PURCHASE
        122.23 SHARES OF COMMON STOCK, PAR VALUE $.01 PER SHARE, OF THE COMPANY.

                      PRIOR TO THE EARLIEST OF (I) THE DATE ON WHICH A
        REGISTRATION STATEMENT WITH RESPECT TO A REGISTERED EXCHANGE OFFER FOR
        THE NOTES IS DECLARED EFFECTIVE UNDER THE ACT, AND (II) THE DATE ON
        WHICH A SHELF REGISTRATION STATEMENT WITH RESPECT TO THE NOTES OR THE
        WARRANTS AND WARRANT SHARES IS DECLARED EFFECTIVE UNDER THE SECURITIES
        ACT, THE WARRANTS EVIDENCED BY THIS CERTIFICATE MAY BE TRANSFERRED OR
        EXCHANGED SEPARATELY FROM THE NOTES AT THE OPTION OF THE HOLDER UPON
        NOTICE TO THE WARRANT AGENT."

               (h)    Cancellation and/or Adjustment of Global Warrants.

               At such time as all beneficial interests in a particular Global
Warrant have been exercised or exchanged for one or more Definitive Warrants or
a particular Global Warrant has been exercised, redeemed, repurchased or
canceled in whole and not in part, each such Global Warrant shall be returned to
or retained and canceled by the Warrant Agent in accordance with Section 3.8
hereof. At any time prior to such cancellation, if any beneficial interest in a
Global Warrant is exchanged for or transferred to a Person who will take
delivery thereof in the form of a beneficial interest in another Global Warrant
or a Definitive Warrant, the number of Warrants represented by such Global
Warrant shall be reduced accordingly and an endorsement shall be made on such
Global Warrant by the Warrant Agent or by the Depositary at the written
direction of the Warrant Agent to reflect such reduction;

                                       22
<PAGE>

and if the beneficial interest is being exchanged for or transferred to a Person
who will take delivery thereof in the form of a beneficial interest in another
Global Warrant or a Definitive Warrant is being exchanged for or transferred to
a Person who will take delivery thereof in the form of a beneficial interest in
a Global Warrant, the number of Warrants represented by the Global Warrant in
which such beneficial interest is received shall be increased accordingly and an
endorsement shall be made on such Global Warrant by the Warrant Agent or by the
Depositary at the written direction of the Warrant Agent to reflect such
increase.

               (i)    General Provisions Relating to Transfers and Exchanges.

                      (i)     To permit registrations of transfers and
        exchanges, the Company shall execute and the Warrant Agent shall
        countersign Global Warrants and Definitive Warrants upon the Company's
        order or at the Warrant Registrar's request.

                      (ii)    No service charge shall be made to a holder of a
        beneficial interest in a Global Warrant or to a Holder of a Definitive
        Warrant for any registration of transfer or exchange, but the Company
        may require payment of a sum sufficient to cover any transfer tax or
        similar governmental charge payable in connection therewith.

                      (iii)   All Global Warrants and Definitive Warrants issued
        upon any registration of transfer or exchange of beneficial interests in
        Global Warrants or of Definitive Warrants shall be the duly authorized,
        executed and issued Warrants of the Company, not subject to any
        preemptive rights, and entitled to the same benefits under this Warrant
        Agreement as the Global Warrants or Definitive Warrants surrendered upon
        such registration of transfer or exchange.

                      (iv)    Prior to due presentment for the registration of a
        transfer of any Warrant, the Warrant Agent and the Company may deem and
        treat the Person in whose name any Warrant is registered as the absolute
        owner of such Warrant for all purposes and neither the Warrant Agent nor
        the Company shall be affected by notice to the contrary.

                      (v)     The Warrant Agent shall countersign Global
        Warrants and Definitive Warrants in accordance with the provisions of
        Section 3.2 hereof.

                                       23

<PAGE>

               (j)    Facsimile Submissions to Warrant Agent.

               All certifications, certificates and Opinions of Counsel required
to be submitted to the Warrant Registrar pursuant to this Section 3.5 to effect
a registration of transfer or exchange may be submitted by facsimile with the
original to follow immediately thereafter.

               The Warrant Registrar shall not be responsible for confirming the
truth or accuracy of representations made in any such certifications or
certificates. As to any Opinions of Counsel delivered pursuant to this Section
3.5, the Warrant Registrar may rely upon, and be fully protected in relying
upon, such opinions.

        3.6    REPLACEMENT WARRANTS.

               If any mutilated Warrant is surrendered to the Warrant Agent or
the Company and the Warrant Agent receives evidence to its satisfaction of the
destruction, loss or theft of any Warrant, the Company shall issue and the
Warrant Agent, upon receipt of a Warrant Countersignature Order, shall
countersign a replacement Warrant if the Warrant Agent's requirements are met.
If required by the Warrant Agent or the Company, an indemnity bond must be
supplied by the Holder that is sufficient in the judgment of the Warrant Agent
and the Company to protect the Company, the Warrant Agent and any of their
respective agents for purposes of the countersignature from any loss that any of
them may suffer if a Warrant is replaced. The Company may charge for its
expenses in replacing a Warrant.

               Every replacement Warrant is an additional Warrant of the Company
and shall be entitled to all of the benefits of this Warrant Agreement to the
same extent as the Warrant surrendered to the Warrant Agent for such replacement
Warrant.

        3.7    TEMPORARY WARRANTS.

               Until certificates representing Warrants are ready for delivery,
the Company may prepare and the Warrant Agent, upon receipt of a Warrant
Countersignature Order, shall issue temporary Warrants. Temporary Warrants shall
be substantially in the form of certificated Warrants but may have variations
that the Company considers appropriate for temporary Warrants and as shall be
reasonably acceptable to the Warrant Agent. Without unreasonable delay, the
Company shall prepare and the Warrant Agent shall countersign definitive
Warrants in exchange for temporary Warrants.

               Holders of temporary Warrants shall be entitled to all of the
benefits of this Warrant Agreement equally and proportionately with all other
Warrants duly issued hereunder.

                                       24

<PAGE>

        3.8    CANCELLATION.

               Subject to Section 3.5(h) hereof, the Company at any time may
deliver Warrants to the Warrant Agent for cancellation. The Warrant Registrar
shall forward to the Warrant Agent any Warrants surrendered to them for
registration of transfer, exchange or exercise. The Warrant Agent and no one
else shall cancel all Warrants surrendered for registration of transfer,
exchange, exercise, replacement or cancellation and shall destroy canceled
Warrants (subject to the record retention requirement of the Exchange Act).
Certification of the destruction of all canceled Warrants shall be delivered to
the Company. The Company may not issue new Warrants to replace Warrants that
have been exercised or that have been delivered to the Warrant Agent for
cancellation.

SECTION 4.     SEPARATION OF WARRANTS; TERMS OF WARRANTS;
               EXERCISE OF WARRANTS.

               (a)     The Warrants will be transferable separately from the
Notes immediately at the option of the Holder, upon notice to the Warrant Agent.
On the Mandatory Separation Date, the Company shall notify the Warrant Agent of
the mandatory separation of all Units. Subject to the terms of this Agreement,
each Holder shall have the right, which may be exercised during the period
commencing at the opening of business on the Exercise Date and until 5:00 p.m.,
New York City time, on the Expiration Date (as defined below) (the "EXERCISE
PERIOD"), to receive from the Company the number of fully paid and nonassessable
Warrant Shares which the Holder may at the time be entitled to receive on
exercise of such Warrants and payment of the Exercise Price (i) through a
"cashless" exercise in accordance with Section 4(g) hereof; (ii) in cash, by
wire transfer or by certified or official bank check payable to the order of the
Company; (iii) by surrendering Notes (in multiples of $1,000 only) which shall
be valued at their aggregate principal amount, plus accrued and unpaid interest
and liquidated damages, if any, or (iv) by a combination thereof, in each case,
equal to the Exercise Price then in effect for such Warrant Shares; provided
that Holders shall be able to exercise their Warrants only if a Registration
Statement relating to the Warrant Shares is then in effect, or the issuance of
the Warrant Shares upon exercise of such Warrants is exempt from the
registration requirements of the Securities Act, and such securities are
qualified for sale or exempt from qualification under the applicable securities
laws of the states in which the various Holders of the Warrants or other Persons
to whom it is proposed that the Warrant Shares be issued on exercise of the
Warrants reside. Each Warrant not exercised prior to 5:00 p.m., New York City
time, on August 15, 2006 (the "EXPIRATION DATE") shall become void and all
rights thereunder and all rights in respect thereof under this agreement shall
cease as of such time. No adjustments as to dividends will be made upon exercise
of the Warrants.

                                       25

<PAGE>

               (b)     In order to exercise all or any of the Warrants
represented by a Warrant Certificate, the holder thereof must deliver to the
Warrant Agent at its corporate trust office set forth in Section 15 hereof the
Warrant Certificate and the form of election to purchase on the reverse thereof
duly filled in and signed, which signature shall be medallion guaranteed by an
institution which is a member of a Securities Transfer Association recognized
signature guarantee program, and upon payment to the Warrant Agent for the
account of the Company of the Exercise Price, which is set forth in the form of
Warrant Certificate attached hereto as Exhibit A, as adjusted as herein
provided, for the number of Warrant Shares in respect of which such Warrants are
then exercised. Payment of the aggregate Exercise Price shall be made (i) in
cash, by wire transfer or by certified or official bank check payable to the
order of the Company, (ii) through a "cashless" exercise in accordance with
Section 4(g) hereof, (iii) by surrendering an aggregate principal amount, plus
accrued and unpaid interest and liquidated damages, if any, of Notes (in
multiples of $1,000 only) equal to the Exercise Price, or (iv) by a combination
thereof.

               (c)     Subject to the provisions of Section 5 hereof, upon
compliance with Sections 4(a) and (b) above, the Warrant Agent shall deliver or
cause to be delivered with all reasonable dispatch, to or upon the written order
of the Holder and in such name or names as the Holder may designate, a
certificate or certificates for the number of whole Warrant Shares issuable upon
the exercise of such Warrants, together with cash delivered by the Company in
lieu of fractional shares as provided in Section 9 hereof; provided that if a
tender offer or an exchange offer for shares of Common Stock shall be made, upon
such surrender of Warrants and payment of the Exercise Price as aforesaid, the
Warrant Agent shall, as soon as possible, but in any event not later than three
Business Days thereafter, deliver or cause to be delivered the full number of
Warrant Shares issuable upon the exercise of such Warrants in the manner
described in this sentence or other securities or property to which such Holder
is entitled hereunder, together with cash as provided in Section 9 hereof. Such
certificate or certificates shall be deemed to have been issued, and any Person
so designated to be named therein shall be deemed to have become a Holder of
record of such Warrant Shares, as of the date of the surrender of such Warrants
and payment of the Exercise Price.

               (d)     The Warrants shall be exercisable, at the election of the
Holders thereof, either in full or from time to time in part, at any time during
the Exercise Period. If less than all the Warrants represented by a Definitive
Warrant are exercised, such Definitive Warrant shall be surrendered and a new
Definitive Warrant of the same tenor and for the number of Warrants which were
not exercised shall be executed by the Company and delivered to the Warrant
Agent and, upon receipt of a Warrant Countersignature Order in accordance with
Section 3.2, the Warrant Agent shall countersign the new Definitive Warrant,
registered in such name or names as may be directed in writing by the Holder,
and shall deliver the new Definitive Warrant to the Person or Persons entitled
to receive the same. The Warrant Agent shall make such notations on the Schedule
of Exchange of Interests

                                       26

<PAGE>

of Global Warrants to each Global Warrant as are required to reflect any change
in the number of Warrants represented by such Global Warrant resulting from any
exercise in accordance with the terms hereof.

               (e)     All Warrant Certificates surrendered upon exercise of
Warrants shall be cancelled by the Warrant Agent in accordance with Section 3.8
hereof. Such cancelled Warrant Certificates shall then be disposed of by the
Warrant Agent in a manner satisfactory to the Company in accordance with Section
3.8 hereof. The Warrant Agent shall account promptly to the Company with respect
to Warrants exercised and concurrently pay to the Company all monies received by
the Warrant Agent for the purchase of the Warrant Shares through the exercise of
such Warrants.

               (f)     The Warrant Agent shall keep copies of this Agreement and
any notices given or received hereunder available for inspection by the Holders
during normal business hours at its office. The Company shall supply the Warrant
Agent from time to time with such numbers of copies of this Agreement as the
Warrant Agent may request.

               (g)     A Holder shall have the right to exercise the Warrants
through a "cashless" exercise, subject to compliance with this Section 4,
without any payment in cash or by certified or official bank check, in which
event the Company shall issue to such Holder a number of Warrant Shares computed
using the formula:

                                               N x (M - E)
                                        X = -----------------
                                                    M

where:

               X      =      the number of Warrant Shares to be issued to such
                             Holder.

               N      =      the number of Warrant Shares issuable upon
                             exercise of the Warrants being exercised by such
                             Holder.

               M     =       the Current Market Price (as defined herein) per
                             share of Common Stock on the exercise date.

               E      =      the Exercise Price.

SECTION 5.     PAYMENT OF TAXES.

               The Company will pay all documentary stamp taxes attributable to
the initial issuance of Warrant Shares upon the exercise of Warrants; provided
that the

                                       27

<PAGE>

Company shall not be required to pay any tax or taxes which may be payable in
respect of any transfer involved in the issue of any Warrant Certificates or any
certificates for Warrant Shares in a name other than that of the Holder of a
Warrant Certificate surrendered upon the exercise of a Warrant, and the Company
shall not be required to issue or deliver such Warrant Certificates unless or
until the Person or Persons requesting the issuance thereof shall have paid to
the Company the amount of such tax or shall have established to the satisfaction
of the Company that such tax has been paid.

SECTION 6.     RESERVATION OF WARRANT SHARES.

               (a)     The Company will at all times reserve and keep available,
free from preemptive rights, out of the aggregate of its authorized but unissued
Common Stock or its authorized and issued Common Stock held in its treasury, for
the purpose of enabling it to satisfy any obligation to issue Warrant Shares
upon exercise of Warrants, the maximum number of shares of Common Stock which
may then be deliverable upon the exercise of all outstanding Warrants.

               (b)     The Company or, if appointed, the transfer agent for the
Common Stock (the "TRANSFER AGENT") and every subsequent transfer agent for any
shares of the Company's capital stock issuable upon the exercise of any of the
rights of purchase represented by the Warrants will be irrevocably authorized
and directed at all times to reserve such number of authorized shares as shall
be required for such purpose. The Company will keep a copy of this Agreement on
file with the Transfer Agent and with every subsequent transfer agent for any
shares of the Company's capital stock issuable upon the exercise of the rights
of purchase represented by the Warrants. The Warrant Agent is hereby irrevocably
authorized to requisition from time to time from such Transfer Agent the stock
certificates required to honor outstanding Warrants upon exercise thereof in
accordance with the terms of this Agreement. The Company will supply such
Transfer Agent with duly executed certificates for such purposes and will
provide or otherwise make available any cash which may be payable as provided in
Section 9 hereof. The Company will furnish such Transfer Agent a copy of all
notices of adjustments, and certificates related thereto, transmitted to each
Holder pursuant to Section 10 hereof.

               (c)     Before taking any action which would cause an adjustment
pursuant to Section 8 hereof to reduce the Exercise Price below the then par
value (if any) of the Warrant Shares, the Company will take any and all
corporate action which may, in the opinion of its counsel (which may be counsel
employed by the Company), be necessary in order that the Company may validly and
legally issue fully paid and nonassessable Warrant Shares at the Exercise Price
as so adjusted.

               (d)     The Company covenants that all Warrant Shares which may
be issued upon exercise of Warrants will, upon issue, be fully paid,
nonassessable, free of preemptive rights and free from all taxes, liens, charges
and security interests

                                       28

<PAGE>

with respect to the issuance thereof, and issued in compliance with all
applicable federal and state securities laws.

SECTION 7.     OBTAINING STOCK EXCHANGE LISTINGS.

               The Company will from time to time take all action which may be
necessary so that the Warrant Shares, immediately upon their issuance upon the
exercise of Warrants, will be listed on the principal securities exchanges,
automated quotation systems or other markets within the United States of
America, if any, on which other shares of Common Stock are then listed, if any.

SECTION 8.     ADJUSTMENT OF EXERCISE PRICE AND NUMBER OF
               WARRANT SHARES ISSUABLE.

               The Exercise Price and the number of Warrant Shares issuable upon
the exercise of each Warrant are subject to adjustment from time to time upon
the occurrence of the events enumerated in this Section 8. For purposes of
Section 8 and Section 10, "COMMON STOCK" means shares now or hereafter
authorized of any class of common stock of the Company and any other stock of
the Company, however designated, that has the right (subject to any prior rights
of any class or series of preferred stock) to participate in any distribution of
the assets or earnings of the Company without limit as to per share amount.

               (a)    Adjustment for Change in Capital Stock.

               If the Company (i) pays a dividend or makes a distribution on its
Common Stock in shares of its Common Stock, (ii) subdivides its outstanding
shares of Common Stock into a greater number of shares, (iii) combines its
outstanding shares of Common Stock into a smaller number of shares, (iv) makes a
distribution on its Common Stock in shares of its capital stock other than
Common Stock or (v) issues by reclassification of its Common Stock any shares of
its capital stock, then the Exercise Price in effect immediately prior to such
action shall be proportionately adjusted so that the Holder of any Warrant
thereafter exercised may receive the aggregate number and kind of shares of
capital stock of the Company which such Holder would have owned immediately
following such action if such Warrant had been exercised immediately prior to
such action.

               The adjustment pursuant to this Section 8(a) shall become
effective immediately after the record date in the case of a dividend or
distribution and immediately after the effective date in the case of a
subdivision, combination or reclassification. If, after an adjustment, a Holder
of a Warrant upon exercise of it may receive shares of two or more classes of
capital stock of the Company, the Company shall determine, in good faith, the
allocation of the adjusted Exercise Price between such classes of capital stock
and shall notify the Warrant Agent of such determination. After such allocation,
the Exercise Price with respect to, and the

                                       29

<PAGE>

number of underlying shares of, each class of capital stock shall thereafter be
subject to adjustment on terms comparable to those applicable to Common Stock in
this Section 8. The adjustment pursuant to this Section 8(a) shall be made
successively whenever any event listed above shall occur.

               (b)    Adjustment for Rights Issue.

               If the Company distributes any rights, options or warrants to all
holders of its Common Stock entitling them for a period expiring within 45 days
after the record date mentioned below to purchase shares of Common Stock at a
price per share less than the Current Market Price per share on that record
date, the Exercise Price shall be adjusted in accordance with the formula:

                                              N x P
                                          O + -----
                                                M
                               E' = E x -----------
                                            O + N

where:
               E'     =      the adjusted Exercise Price.

               E      =      the current Exercise Price.

               O      =      the number of shares of Common Stock outstanding on
                             the record date.

               N      =      the number of additional shares of Common Stock
                             issuable pursuant to such rights, options or
                             warrants.

               P      =      the price per share of the additional shares.

               M      =      the Current Market Price per share of Common Stock
                             on the record date.

               The adjustment pursuant to this Section 8(b) shall be made
successively whenever any such rights, options or warrants are issued and shall
become effective immediately after the record date for the determination of
stockholders entitled to receive the rights, options or warrants. If at the end
of the period during which such rights, options or warrants are exercisable, not
all rights, options or warrants shall have been exercised, the Exercise Price
shall be immediately readjusted to what it would have been if "N" in the above
formula had been the number of shares actually issued.

               (c)    Adjustment for Other Distributions.

                                       30

<PAGE>

               If the Company distributes to all holders of its Common Stock any
of its assets or debt securities or any rights or warrants to purchase debt
securities of the Company, the Exercise Price shall be adjusted in accordance
with the formula:

                                           M - F
                                  E' = E x -----
                                             M
where:

               E'     =      the adjusted Exercise Price.

               E      =      the current Exercise Price.

               M      =      the Current Market Price per share of Common
                             Stock on the record date mentioned below.

               F      =      the fair market value on the record date of the
                             assets, securities, rights or warrants to be
                             distributed in respect of one share of Common Stock
                             as determined in good faith by the Board of
                             Directors of the Company (the "BOARD OF
                             DIRECTORS").

               The adjustment pursuant to this Section 8(c) shall be made
successively whenever any such distribution is made and shall become effective
immediately after the record date for the determination of stockholders entitled
to receive the distribution.

               This Section 8(c) does not apply to cash dividends or cash
distributions paid out of consolidated current or retained earnings as shown on
the books of the Company prepared in accordance with generally accepted
accounting principles. Also, this Section 8(c) does not apply to rights, options
or warrants referred to in Section 8(b) hereof.

               (d)    Current Market Price.

               The "CURRENT MARKET PRICE" per security at any date of
determination shall be the average daily Market Price during the period of the
most recent 20 days, ending on such date, on which the national securities
exchanges were open for trading, except that if such security is not then listed
or admitted to trading on any national securities exchange or quoted on a
national quotation system or in the over-the-counter market, the Current Market
Price shall be the Market Price on such date as set forth in paragraph (iii) of
the definition thereof below.

               "MARKET PRICE" per security at any date of determination shall be
the amount per security, equal to:

                                       31

<PAGE>

                      (i)     the last sale price of such security on such date
        or, if no such sale takes place on such date, the average of the closing
        bid and asked prices thereof on such date, in each case as officially
        reported on the principal national securities exchange on which such
        security is then listed or admitted to trading, or

                      (ii)    if such security is not then listed or admitted to
        trading on any national securities exchange but is quoted on a national
        quotation system or in the over-the-counter market, the average of the
        closing bid and asked prices of such security on such date as shown by
        such quotation system, or

                      (iii)   if such security is not then listed or admitted to
        trading on any national securities exchange or quoted on a national
        quotation system or in the over-the-counter market, the Fair Value (as
        defined below) per security at such date of determination.

               In Sections 8(b) and (c) hereof, the "FAIR VALUE" per security at
any date of determination shall be (A) the last price per security at which such
security was issued and sold by the Company in a Non-Affiliate Sale within the
three-month period preceding such date of determination or (B) if clause (A) is
not applicable, the fair market value of such security determined in good faith
by (1) a majority of the Board of Directors, including a majority of the
Disinterested Directors, and approved in a Board resolution delivered to the
Warrant Agent, or (2) a nationally recognized investment banking, appraisal or
valuation firm, which is not an Affiliate of the Company, in each case, taking
into account all factors deemed relevant by the Board of Directors or such
investment banking, appraisal or valuation firm.

               For purposes of this Section 8(d), "DISINTERESTED DIRECTOR"
means, in connection with any issuance of securities that gives rise to a
determination of the Fair Value thereof, each member of the Board of Directors
who is not an officer, employee, director or other Affiliate of the party to
whom the Company is proposing to issue the securities giving rise to such
determination.

               For purposes of this Section 8(d), "AFFILIATE" of any specified
Person means (A) any other Person directly or indirectly controlling or
controlled by or under direct or indirect common control with such specified
Person and (B) any director, officer or employee of such specified Person. For
purposes of this definition "control" (including, with correlative meanings, the
terms "controlling," "controlled by" and "under common control with") as used
with respect to any Person, shall mean the possession, directly or indirectly,
of the power to direct or cause the direction of the management or policies of
such Person, whether through the ownership of voting securities, by agreement or
otherwise.

                                       32

<PAGE>

               (e)    When De Minimis Adjustment May Be Deferred.

               No adjustment in the Exercise Price need be made unless the
adjustment would require an increase or decrease of at least 1% in the Exercise
Price. Any adjustments that are not made shall be carried forward and taken into
account in any subsequent adjustment. All calculations under this Section 8
shall be made to the nearest cent or to the nearest 1/100th of a share, as the
case may be, it being understood that no such rounding shall be made under
Section 8(m).

               (f)    When No Adjustment Required.

               No adjustment need be made for a transaction referred to in
Section 8(a), (b) or (c) hereof, if Warrant Holders are to participate (without
being required to exercise their Warrants) in the transaction on a basis and
with written notice that the Board of Directors determines to be fair and
appropriate in light of the basis and notice on which holders of Common Stock
participate in the transaction.

               (g)    Notice of Adjustment.

               Whenever the Exercise Price is adjusted, the Company shall
provide the notices required by Section 10 hereof.

               (h)    Voluntary Reduction.

               The Company from time to time may reduce the Exercise Price by
any amount for any period of time, if the period is at least 20 days and if the
reduction is irrevocable during the period; provided that in no event may the
Exercise Price be less than the par value of a share of Common Stock. Whenever
the Exercise Price is reduced, the Company shall mail to Warrant Holders and the
Warrant Agent a notice of the reduction. The Company shall mail the notice at
least 15 days before the date the reduced Exercise Price takes effect. The
notice shall state the reduced Exercise Price and the period in which it will be
in effect. A reduction of the Exercise Price does not change or adjust the
Exercise Price otherwise in effect for purposes of Sections 8(a), (b) or (c)
hereof.

               (i)    Notice of Certain Transactions.

               If (i) the Company takes any action that would require an
adjustment in the Exercise Price pursuant to Section 8(a), (b) or (c) hereof and
if the Company does not arrange for Warrant Holders to participate pursuant to
Section 8(f) hereof, (ii) the Company takes any action that would require a
supplemental Warrant Agreement pursuant to Section 8(j) hereof or (iii) there is
a liquidation or dissolution of the Company, then the Company shall mail to
Warrant Holders a notice stating the proposed record date for a dividend or
distribution or the proposed effective date of a subdivision, combination,
reclassification, consolidation, merger, transfer, lease,

                                       33

<PAGE>

liquidation or dissolution. The Company shall mail the notice at least 15 days
before such date. Failure to mail the notice or any defect in it shall not
affect the validity of the transaction.

               (j)    Reorganization of Company.

               If the Company consolidates or merges with or into, or transfers
or leases all or substantially all its assets to, any Person, upon consummation
of such transaction the Warrants shall automatically become exercisable for the
kind and amount of securities, cash or other assets which the Holder of a
Warrant would have owned immediately after the consolidation, merger, transfer
or lease if the Holder had exercised the Warrant immediately before the
effective date of the transaction with notice thereof to the Warrant Agent.
Concurrently with the consummation of such transaction, the corporation formed
by or surviving any such consolidation or merger if other than the Company, or
the Person to which such transfer or lease shall have been made, shall enter
into a supplemental Warrant Agreement so providing and further providing for
adjustments which shall be as nearly equivalent as may be practical to the
adjustments provided for in this Section 8(j). The successor Company shall mail
to Warrant Holders and the Warrant Agent a written notice describing the
supplemental Warrant Agreement. If the issuer of securities deliverable upon
exercise of Warrants under the supplemental Warrant Agreement is an affiliate of
the formed, surviving, transferee or lessee corporation, that issuer shall join
in the supplemental Warrant Agreement. If this Section 8(j) applies, Sections
8(a), (b) or (c) hereof do not apply.

               (k)    Company Determination Final.

               Any determination that the Company or the Board of Directors must
make pursuant to Section 8(a), (b), (c), (d), (e) or (f) hereof is conclusive.

               (l)    Warrant Agent's Disclaimer.

               The Warrant Agent has no duty to determine when an adjustment
under this Section 8 should be made, how it should be made or what it should be.
The Warrant Agent has no duty to determine whether any provisions of a
supplemental Warrant Agreement under Section 8(j) hereof are correct. The
Warrant Agent makes no representation as to the validity or value of any
securities or assets issued upon exercise of Warrants. The Warrant Agent shall
not be responsible for the Company's failure to comply with this Section 8.

               (m)    When Issuance or Payment May Be Deferred.

               In any case in which this Section 8 shall require that an
adjustment in the Exercise Price be made effective as of a record date for a
specified event, the Company may, with notice thereof to the Warrant Agent,
elect to defer until the

                                       34

<PAGE>

occurrence of such event (i) issuing to the Holder of any Warrant exercised
after such record date the Warrant Shares and other capital stock of the
Company, if any, issuable upon such exercise based on the Exercise Price prior
to such adjustment over and above the Warrant Shares and other capital stock of
the Company, if any, issuable upon such exercise on the basis of the adjusted
Exercise Price and (ii) paying to such Holder any amount in cash in lieu of a
fractional share pursuant to Section 9 hereof; provided that the Company shall
deliver to such Holder a due bill or other appropriate instrument evidencing
such Holder's right to receive such additional Warrant Shares, other capital
stock and cash upon the occurrence of the event requiring such adjustment.

               (n)    Adjustment in Number of Shares.

               Upon each adjustment of the Exercise Price pursuant to this
Section 8 (other than pursuant to Sections 8(a)(iv) and (v) and Section 8(c)),
each Warrant outstanding prior to the making of the adjustment in the Exercise
Price shall thereafter evidence the right to receive, upon payment of the
adjusted Exercise Price, that number of shares of Common Stock (calculated to
the nearest hundredth) obtained from the following formula:

                                         E
                               N' = N x ---
                                         E'

where:

               N'     =      the adjusted number of Warrant Shares issuable
                             upon exercise of a Warrant by payment of the
                             adjusted Exercise Price.

               N      =      the number of Warrant Shares previously issuable
                             upon exercise of a Warrant by payment of the
                             Exercise Price prior to adjustment.

               E'     =      the adjusted Exercise Price.

               E      =      the Exercise Price prior to adjustment.

               Upon each adjustment of the Exercise Price pursuant to Sections
8(a)(iv) and (v) and Section 8(c), each Warrant outstanding prior to the making
of the adjustment in the Exercise Price shall thereafter evidence the right to
receive, upon payment of the adjusted Exercise Price, the amount and kind of
securities which such Holder would have owned immediately following such
dividend, distribution or issuance if such Warrant had been exercised
immediately prior to such action.

                                       35

<PAGE>

               (o)    Form of Warrants.

               Irrespective of any adjustments in the Exercise Price or the
number or kind of shares purchasable upon the exercise of the Warrants, Warrants
issued prior to or after such adjustment may continue to express the same price
and number and kind of shares as are stated in the Warrants initially issuable
pursuant to this Agreement.

SECTION 9.     FRACTIONAL INTERESTS.

               The Company shall not be required to issue fractional Warrant
Shares on the exercise of Warrants. If more than one Warrant shall be presented
for exercise in full at the same time by the same Holder, the number of full
Warrant Shares which shall be issuable upon the exercise thereof shall be
computed on the basis of the aggregate number of Warrant Shares purchasable on
exercise of the Warrants so presented. If any fraction of a Warrant Share would,
except for the provisions of this Section 9, be issuable on the exercise of any
Warrants (or specified portion thereof), the Company, at its option, shall (a)
pay an amount in cash equal to (i) the Market Price per Warrant Share, as
determined on the day immediately preceding the date the Warrant is presented
for exercise, multiplied by (ii) such fraction of a Warrant Share, computed to
the nearest whole U.S. cent, or (b) round up such fraction of a Warrant Share to
the next full Warrant Share.

SECTION 10.           NOTICES TO WARRANT HOLDERS.

               (a)    Upon any adjustment of the Exercise Price pursuant to
Section 8 hereof, the Company shall promptly thereafter (i) cause to be filed
with the Warrant Agent a certificate of a firm of independent public accountants
of recognized standing selected by the Board of Directors of the Company (who
may be the regular auditors of the Company) setting forth the Exercise Price
after such adjustment and setting forth in reasonable detail the method of
calculation and the facts upon which such calculations are based and setting
forth the number of Warrant Shares (or portion thereof) issuable after such
adjustment in the Exercise Price, upon exercise of a Warrant and payment of the
adjusted Exercise Price, which certificate shall be conclusive evidence of the
correctness of the matters set forth therein, and (ii) cause to be given to each
of the Holders of Warrants at the address appearing on the Warrant register for
each such Holder written notice of such adjustment by first-class mail, postage
prepaid. Where appropriate, such notice may be given in advance and included as
a part of the notice required to be mailed under the other provisions of this
Section 10.

               (b)    In case:

                      (i)     the Company shall authorize the issuance to all
        holders of shares of Common Stock of rights, options or warrants to
        subscribe for or

                                       36

<PAGE>

        purchase shares of Common Stock or of any other subscription rights or
        warrants;

                      (ii)    the Company shall authorize the distribution to
        all holders of shares of Common Stock of evidences of its indebtedness
        or assets (other than dividends or cash distributions payable out of
        consolidated current or retained earnings as shown on the books of the
        Company prepared in accordance with generally accepted accounting
        principles or dividends payable in shares of Common Stock or
        distributions referred to in Section 8(a) hereof);

                      (iii)   of any consolidation or merger to which the
        Company is a party and for which approval of any stockholders of the
        Company is required, or of the conveyance, lease or other transfer of
        the properties and assets of the Company substantially as an entirety,
        or of any reclassification or change of Common Stock issuable upon
        exercise of the Warrants (other than a change in par value, or from par
        value to no par value, or from no par value to par value, or as a result
        of a subdivision or combination), or a tender offer or exchange offer
        for shares of Common Stock;

                      (iv)    of the voluntary or involuntary dissolution,
        liquidation or winding up of the Company; or

                      (v)     the Company proposes to take any action (other
        than actions of the character described in Section 8(a) hereof) which
        would require an adjustment of the Exercise Price pursuant to Section 8
        hereof;

then the Company shall cause to be filed with the Warrant Agent and shall cause
to be given to each of the Holders of Warrants at such Holder's address
appearing on the Warrant register, at least 20 days (or 10 days in any case
specified in clauses (i) or (ii) above) prior to the applicable record date
hereinafter specified, or promptly in the case of events for which there is no
record date, by first-class mail, postage prepaid, a written notice stating (x)
the date as of which the holders of record of shares of Common Stock to be
entitled to receive any such rights, options, warrants or distribution are to be
determined, (y) the initial expiration date set forth in any tender offer or
exchange offer for shares of Common Stock, or (z) the date on which any such
consolidation, merger, conveyance, lease, transfer, dissolution, liquidation
or winding up is expected to become effective or consummated, and the date as of
which it is expected that holders of record of shares of Common Stock shall be
entitled to exchange such shares for securities or other property, if any,
deliverable upon such reclassification, consolidation, merger, conveyance,
lease, transfer, dissolution, liquidation or winding up. The failure to give the
notice required by this Section 10 or any defect therein shall not affect the
legality or validity of any distribution, right, option, warrant, consolidation,
merger, conveyance, lease, transfer, dissolution, liquidation or winding up, or
the vote upon any action.

                                       37

<PAGE>

               (c)     Nothing contained in this Agreement or in any of the
Warrant Certificates shall be construed as conferring upon the Holders of
Warrants the right to vote or to consent or to receive notice as stockholders in
respect of the meetings of stockholders or the election of directors of the
Company or any other matter, or any rights whatsoever as stockholders of the
Company.

SECTION 11.        MERGER, CONSOLIDATION OR CHANGE OF NAME
                   OF WARRANT AGENT.

               (a)     Any Person into which the Warrant Agent may be merged or
with which it may be consolidated, or any Person resulting from any merger or
consolidation to which the Warrant Agent shall be a party, or any Person
succeeding to the business of the Warrant Agent, shall be the successor to the
Warrant Agent hereunder without the execution or filing of any paper or any
further act on the part of any of the parties hereto, provided that such Person
would be eligible for appointment as a successor warrant agent under the
provisions of Section 13 hereof. In case at the time such successor to the
Warrant Agent shall succeed to the agency created by this Agreement, and in case
at that time any of the Warrant Certificates shall have been countersigned but
not delivered, any such successor to the Warrant Agent may adopt the
countersignature of the original Warrant Agent; and in case at that time any of
the Warrant Certificates shall not have been countersigned, any successor to the
Warrant Agent may countersign such Warrant Certificates either in the name of
the predecessor Warrant Agent or in the name of the successor to the Warrant
Agent; and in all such cases such Warrant Certificates shall have the full force
and effect provided in the Warrant Certificates and in this Agreement.

               (b)     In case at any time the name of the Warrant Agent shall
be changed and at such time any of the Warrant Certificates shall have been
countersigned but not delivered, the Warrant Agent whose name has been changed
may adopt the countersignature under its prior name, and in case at that time
any of the Warrant Certificates shall not have been countersigned, the Warrant
Agent may countersign such Warrant Certificates either in its prior name or in
its changed name, and in all such cases such Warrant Certificates shall have the
full force and effect provided in the Warrant Certificates and in this
Agreement.

SECTION 12.        WARRANT AGENT.

               The Warrant Agent undertakes the duties and obligations imposed
by this Agreement upon the following terms and conditions, by all of which the
Company and the Holders of Warrants, by their acceptance thereof, shall be
bound:

               (a)     The statements contained herein and in the Warrant
Certificates shall be taken as statements of the Company, and the Warrant Agent
assumes no responsibility for the correctness of any of the same except such as
describe the Warrant Agent or action taken or to be taken by it. The Warrant
Agent

                                       38

<PAGE>

assumes no responsibility with respect to the distribution of the Warrant
Certificates except as otherwise provided herein.

               (b)     The Warrant Agent shall not be responsible for any
failure of the Company to comply with any of the covenants contained in this
Agreement or in the Warrant Certificates to be complied with by the Company.

               (c)     The Warrant Agent may consult at any time with counsel
satisfactory to it (who may be counsel for the Company) and the Warrant Agent
shall incur no liability or responsibility to the Company or to any holder of
any Warrant Certificate in respect of any action taken, suffered or omitted by
it hereunder in good faith and in accordance with the opinion or the advice of
such counsel.

               (d)     The Warrant Agent shall incur no responsibility to the
Company or to any holder of any Warrant Certificate for any action taken in
reliance on any Warrant Certificate, certificate of shares, adjustments,
determination, notice, resolution, waiver, consent, order, certificate, or other
paper, document or instrument believed by it to be genuine and to have been
signed, sent or presented by the proper party or parties.

               (e)     The Company agrees to pay to the Warrant Agent reasonable
compensation (which shall include the reasonable fees and expenses of its
counsel) for all services rendered by the Warrant Agent in the execution,
administration, preparation, delivery and amendment of this Agreement, and to
reimburse the Warrant Agent for all expenses, taxes and governmental charges and
other charges of any kind and nature incurred by the Warrant Agent in the
execution, administration, preparation, delivery and amendment of this
Agreement. The Company shall indemnify the Warrant Agent against any and all
losses, liabilities or expenses incurred by it arising out of or in connection
with the acceptance or administration of its duties under this Warrant
Agreement, including the costs and expenses of enforcing this Warrant Agreement
against the Company and defending itself against any claim (whether asserted by
the Company or any Holder or any other Person) or liability in connection with
the exercise or performance of any of its powers or duties hereunder, except to
the extent any such loss, liability or expense may be attributable to its gross
negligence, wilful misconduct or bad faith. The indemnity provided in this
Agreement shall survive the termination of this Agreement and the resignation or
removal of the Warrant Agent. The costs and expenses incurred in enforcing this
right of indemnification shall be paid by the Company. The Warrant Agent shall
notify the Company promptly of any claim for which it may seek indemnity.
Failure by the Warrant Agent to so notify the Company shall not relieve the
Company of its obligations hereunder. The Company shall defend the claim and the
Warrant Agent shall cooperate in the defense. The Warrant Agent may have
separate counsel and the Company shall pay the reasonable fees and expenses of
such counsel. The Company need not pay for any settlement made without its
consent, which consent shall not be unreasonably withheld.

                                       39

<PAGE>

               (f)     The Warrant Agent shall be under no obligation to
institute any action, suit or legal proceeding or to take any other action
likely to involve expense unless the Company or one or more Holders of Warrants
shall furnish the Warrant Agent with reasonable security and indemnity for any
costs and expenses which may be incurred, but this provision shall not affect
the power of the Warrant Agent to take such action as it may consider proper,
whether with or without any such security or indemnity. All rights of action
under this Agreement or under any of the Warrants may be enforced by the Warrant
Agent without the possession of any of the Warrant Certificates or the
production thereof at any trial or other proceeding relative thereto, and any
such action, suit or proceeding instituted by the Warrant Agent shall be brought
in its name as Warrant Agent and any recovery of judgment shall be for the
ratable benefit of the Holders of the Warrants, as their respective rights or
interests may appear.

               (g)     Except as otherwise prohibited by law, the Warrant Agent,
and any stockholder, director, officer or employee of it, may buy, sell or deal
in any of the Warrants or other securities of the Company or become pecuniarily
interested in any transaction in which the Company may be interested, or
contract with or lend money to the Company or otherwise act as fully and freely
as though it were not Warrant Agent under this Agreement. Nothing herein shall
preclude the Warrant Agent from acting in any other capacity for the Company or
for any other Person.

               (h)     The Warrant Agent shall act under this Agreement solely
as agent for the Company, and its duties shall be determined solely by the
provisions hereof. The Warrant Agent shall not be liable for anything which it
may do or refrain from doing in connection with this Agreement except for its
own negligence or bad faith.

               (i)     The Warrant Agent shall not at any time be under any duty
or responsibility to any Holder of any Warrant Certificate to make or cause to
be made any adjustment of the Exercise Price or number of the Warrant Shares or
other securities or property deliverable as provided in this Agreement, or to
determine whether any facts exist which may require any of such adjustments, or
with respect to the nature or extent of any such adjustments, when made, or with
respect to the method employed in making the same. The Warrant Agent shall not
be accountable with respect to the validity or value or the kind or amount of
any Warrant Shares or of any securities or property which may at any time be
issued or delivered upon the exercise of any Warrant or with respect to whether
any such Warrant Shares or other securities will when issued be validly issued
and fully paid and nonassessable, and makes no representation with respect
thereto.

               (j)     The Warrant Agent, in its capacity as Warrant Registrar,
shall have all the rights, powers, privileges, exculpation, protections, and
indemnities as are provided to the Warrant Agent under this Agreement.

                                       40

<PAGE>

SECTION 13.        CHANGE OF WARRANT AGENT.

               The Warrant Agent may resign as Warrant Agent at any time
following 30 days written notice thereof to the Company. If the Warrant Agent
shall become incapable of acting as Warrant Agent, the Company shall appoint a
successor to such Warrant Agent. If the Company shall fail to make such
appointment within a period of 30 days after it has been notified in writing of
such incapacity by the Warrant Agent or by any Holder of a Warrant, then the
Holder of any Warrant may apply to any court of competent jurisdiction for the
appointment of a successor to the Warrant Agent. Pending appointment of a
successor to such Warrant Agent, either by the Company or by such a court, the
duties of the Warrant Agent shall be carried out by the Company. The Holders of
a majority of the unexercised Warrants shall be entitled at any time to remove
the Warrant Agent and appoint a successor to such Warrant Agent. Such successor
to the Warrant Agent need not be approved by the Company or the former Warrant
Agent. After appointment, the successor to the Warrant Agent shall be vested
with the same powers, rights, duties and responsibilities as if it had been
originally named as Warrant Agent without further act or deed; provided that the
former Warrant Agent shall deliver and transfer to the successor to the Warrant
Agent any property at the time held by it hereunder and execute and deliver any
further assurance, conveyance, act or deed necessary for the purpose. Failure to
give any notice provided for in this Section 13, however, or any defect therein,
shall not affect the legality or validity of the appointment of a successor to
the Warrant Agent.

SECTION 14.        REPORTS.

               (a)     Whether or not required by the rules and regulations of
the Commission, so long as any Warrants are outstanding, the Company shall
furnish to the Warrant Agent (i) all quarterly and annual financial information
that would be required to be contained in a filing with the Commission on Forms
10-Q and 10-K if the Company were required to file such Forms, including a
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and, with respect to the annual information only, a report thereon
by the Company's certified independent accountants and (ii) all current reports
that would be required to be filed with the Commission on Form 8-K if the
Company were required to file such reports. In addition, whether or not required
by the rules and regulations of the Commission, the Company shall file a copy of
all such information and reports with the Commission for public availability
(unless the Commission shall not accept such a filing) and, if and to the extent
that such information is not accepted for filing by the SEC, make such
information available to securities analysts and prospective investors upon
request.

                                       41

<PAGE>

               (b)     The Company shall provide the Warrant Agent with a
sufficient number of copies of all such reports for the Warrant Agent to deliver
to the Holders of the Warrants upon their request.

SECTION 15.            NOTICES TO COMPANY AND WARRANT AGENT.

               All notices, demands and other communications provided for or
permitted under this Agreement to be given or made by the Warrant Agent or by
the Holder of any Warrant to or on the Company shall be made in writing by hand-
delivery, certified first-class mail, return receipt requested, next-day air
courier or facsimile as follows (until another address is filed in writing by
the Company with the Warrant Agent):

                      Orbital Sciences Corporation
                      21839 Atlantic Boulevard
                      Dulles, VA  20166
                      Facsimile: (703) 406-5572
                      Attention: Legal Department

               With a copy to:

                      Hogan and Hartson, L.L.P.
                      Columbia Square
                      555 13th Street N.W.
                      Washington, DC  20004
                      Facsimile: (202) 637-5910
                      Attention: James E. Showen

               In case the Company shall fail to maintain such office or agency
or shall fail to give such notice of the location or of any change in the
location thereof, presentations may be made and notices and demands may be
served at the principal office of the Warrant Agent.

               All notices, demands and other communications provided for or
permitted under this Agreement to be given or made by the Company or by the
Holder(s) of any Warrant to the Warrant Agent shall be made in writing by hand-
delivery, certified first-class mail, return receipt requested, next-day air
courier or facsimile as follows (until another address is filed in writing by
the Warrant Agent with the Company):

                      U.S. Bank, N.A.
                      180 East 5th Street
                      St. Paul, MN 55101
                      Facsimile:  (651) 244-0711
                      Attention: Corporate Trust Department

                                       42

<PAGE>

        All such notices and communications shall be deemed to have been duly
given: when delivered by hand, if personally delivered; five Business Days after
being deposited in the mail, postage prepaid, if mailed; one Business Day after
being timely delivered to a next-day air courier; and when receipt is
acknowledged by the addressee, if telecopied.

SECTION 16.           SUPPLEMENTS AND AMENDMENTS.

               The Company and the Warrant Agent may from time to time
supplement or amend this Agreement without the approval of any Holders of
Warrants in order to cure any ambiguity or to correct or supplement any
provision contained herein which may be defective or inconsistent with any other
provision herein, or to make any other provisions in regard to matters or
questions arising hereunder which the Company and the Warrant Agent may deem
necessary or desirable and which shall not in any way adversely affect the
interests of the Holders of Warrants. Any amendment or supplement to this
Agreement that has an adverse effect on the interests of the Holders of Warrants
shall require the written consent of the Holders of a majority of the then
outstanding Warrants (excluding Warrants held by the Company or any of its
affiliates (as such term is defined in Rule 405 under the Securities Act). The
consent of each Holder of Warrants affected shall be required for any amendment
pursuant to which the Exercise Price would be increased or the number of Warrant
Shares purchasable upon exercise of Warrants would be decreased (other than
pursuant to adjustments provided in this Agreement). Upon receipt of a
certificate from the appropriate officer of the Company which states that the
proposed supplement or amendment is in compliance with the terms of this Section
16, and, if such supplement or amendment changes the Warrant Agent's duties,
liabilities or obligations, upon the agreement of the Warrant Agent, the Warrant
Agent shall execute such supplement or amendment.

SECTION 17.           SUCCESSORS.

               All the covenants and provisions of this Agreement by or for the
benefit of the Company or the Warrant Agent shall bind and inure to the benefit
of their respective successors and assigns hereunder including, without
limitation and without the need for an express assignment, subsequent Holders.

SECTION 18.           TERMINATION.

               This Agreement shall terminate at 5:00 p.m., New York City time
on the Expiration Date. Notwithstanding the foregoing, this Agreement will
terminate on any earlier date if all Warrants have been exercised. The
provisions of Section 12 shall survive such termination.

                                       43

<PAGE>

SECTION 19.           GOVERNING LAW.

               THIS AGREEMENT AND EACH WARRANT CERTIFICATE ISSUED HEREUNDER
SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF
NEW YORK, AS APPLIED TO CONTRACTS MADE AND TO BE PERFORMED WITHIN THE STATE OF
NEW YORK, INCLUDING WITHOUT LIMITATION, SECTIONS 5-1401 AND 5-1402 OF THE NEW
YORK GENERAL OBLIGATIONS LAW AND RULE 327(b) OF THE NEW YORK CIVIL PRACTICE LAWS
AND RULES.

SECTION 20.           BENEFITS OF THIS AGREEMENT.

               Nothing in this Agreement shall be construed to give to any
Person other than the Company, the Warrant Agent and the Holders of Warrants any
legal or equitable right, remedy or claim under this Agreement; but this
Agreement shall be for the sole and exclusive benefit of the Company, the
Warrant Agent and the Holders of Warrants. The Company agrees that the Holders
of the Warrants shall be third-party beneficiaries to the agreements made
hereunder by the Company and each Holder shall have the right to enforce such
agreements directly to the extent it deems enforcement necessary or advisable to
protect its rights hereunder.

SECTION 21.           COUNTERPARTS.

               This Agreement may be executed in any number of counterparts and
each of such counterparts shall for all purposes be deemed to be an original,
and all such counterparts shall together constitute but one and the same
instrument.

                        [Signature page follows this page]

                                       44

<PAGE>

               IN WITNESS WHEREOF, the parties hereto have caused this Agreement
to be duly executed, as of the day and year first above written.

                                ORBITAL SCIENCES CORPORATION

                                By: /s/ MICHAEL R. WILLIAMS
                                   -------------------------------
                                        Name:  Michael R. Williams
                                        Title: Senior Vice President and
                                               Treasurer

                                U.S. BANK, N.A., as Warrant Agent

                                By: /s/ FRANK P. LESLIE
                                   -------------------------------
                                        Name:  Frank P. Leslie
                                        Title: Vice President

<PAGE>

                                    EXHIBIT A

                          [Form of Warrant Certificate]

                                                          135,000 Warrants
No. 1                                                     CUSIP No.

                               Warrant Certificate

                          ORBITAL SCIENCES CORPORATION

               This Warrant Certificate certifies that Cede & Co., or its
registered assigns, is the registered holder of Warrants, expiring August 15,
2006 (the "WARRANTS"), to purchase common stock, par value $.01 per share (the
"COMMON STOCK"), of Orbital Sciences Corporation, a Delaware corporation (the
"COMPANY"). Each Warrant initially entitles the registered holder upon exercise
at any time from 9:00 a.m., New York City time, on the date immediately
following the Mandatory Separation Date (as defined in the Warrant Agreement)
(the "EXERCISE DATE") until 5:00 p.m., New York City time, on August 15, 2006,
the Expiration Date, to receive from the Company 122.23 fully paid and
nonassessable shares of Common Stock (the "WARRANT SHARES") at the initial
exercise price (the "EXERCISE PRICE") of $3.86 per share payable upon surrender
of this Warrant Certificate and payment of the Exercise Price at the office or
agency of the Warrant Agent, subject to the conditions set forth herein and in
the Warrant Agreement referred to on the reverse hereof. The Exercise Price and
number of Warrant Shares issuable upon exercise of the Warrants are subject to
adjustment upon the occurrence of certain events set forth in the Warrant
Agreement.

               No Warrant may be exercised after 5:00 p.m., New York City time,
on the Expiration Date, and to the extent not exercised by such time Warrants
shall become void.

               Reference is hereby made to the further provisions of this
Warrant Certificate set forth on the reverse hereof and such further provisions
shall for all purposes have the same effect as though fully set forth at this
place.

               This Warrant Certificate shall not be valid unless countersigned
by the Warrant Agent, as such term is used in the Warrant Agreement.

               This Warrant Certificate shall be governed by and construed in
accordance with the laws of the State of New York applicable to contracts made
and to be performed in New York, including, without limitation Sections 5-1401
and 5- 1402 of the New York General Obligations Law and Rule 327(b) of the New
York Civil Practices Laws and Rules.

                                       A-1

<PAGE>

               IN WITNESS WHEREOF, the Company has caused this Warrant
Certificate to be signed below.

DATED:  August 22, 2002

                                ORBITAL SCIENCES CORPORATION

                                By:
                                   -------------------------------
                                       Name:
                                       Title:

Countersigned:
U.S. BANK, N.A.
as Warrant Agent

By:
   -------------------------------
      Authorized Signature

                                       A-2

<PAGE>

                        [Reverse of Warrant Certificate]

               [Unit Legend.  Each Warrant issued prior to the Mandatory
Separation Date shall bear the following legend on the reverse thereof:]

        THE WARRANTS EVIDENCED BY THIS CERTIFICATE ARE INITIALLY ISSUED AS PART
        OF AN ISSUANCE OF 135,000 UNITS (THE "UNITS"), EACH OF WHICH CONSISTS OF
        $1,000 PRINCIPAL AMOUNT AT MATURITY OF THE 12% SECOND PRIORITY SECURED
        NOTES DUE 2006, SERIES A, OF THE COMPANY (THE "NOTES") AND ONE WARRANT
        INITIALLY ENTITLING THE HOLDER THEREOF TO PURCHASE 122.23 SHARES OF
        COMMON STOCK, PAR VALUE $.01 PER SHARE, OF THE COMPANY.

        PRIOR TO THE EARLIEST OF (I) THE DATE ON WHICH A REGISTRATION STATEMENT
        WITH RESPECT TO A REGISTERED EXCHANGE OFFER FOR THE NOTES IS DECLARED
        EFFECTIVE UNDER THE ACT, AND (II) THE DATE ON WHICH A SHELF REGISTRATION
        STATEMENT WITH RESPECT TO THE NOTES OR THE WARRANTS AND WARRANT SHARES
        IS DECLARED EFFECTIVE UNDER THE SECURITIES ACT, THE WARRANTS EVIDENCED
        BY THIS CERTIFICATE MAY BE TRANSFERRED OR EXCHANGED SEPARATELY FROM EACH
        OTHER AT THE OPTION OF THE HOLDER UPON NOTICE TO THE WARRANT AGENT.

               [Global Warrant Legend.  Each Global Warrant shall bear the
following legend on the reverse thereof.]

        THIS GLOBAL WARRANT IS HELD BY THE DEPOSITARY (AS DEFINED IN THE WARRANT
        AGREEMENT GOVERNING THIS WARRANT) OR ITS NOMINEE IN CUSTODY FOR THE
        BENEFIT OF THE BENEFICIAL OWNERS HEREOF, AND IS NOT TRANSFERABLE TO ANY
        PERSON UNDER ANY CIRCUMSTANCES EXCEPT THAT (I) THE WARRANT AGENT MAY
        MAKE SUCH NOTATIONS HEREON AS MAY BE REQUIRED PURSUANT TO SECTION 3.5 OF
        THE WARRANT AGREEMENT, (II) THIS GLOBAL WARRANT MAY BE EXCHANGED IN
        WHOLE BUT NOT IN PART PURSUANT TO SECTION 3.5(a) OF THE WARRANT
        AGREEMENT, (III) THIS GLOBAL WARRANT MAY BE DELIVERED TO THE WARRANT
        AGENT FOR CANCELLATION PURSUANT TO SECTION 3.8 OF THE WARRANT AGREEMENT
        AND (IV) THIS GLOBAL WARRANT MAY BE TRANSFERRED TO A SUCCESSOR
        DEPOSITARY WITH THE PRIOR WRITTEN CONSENT OF THE COMPANY.

                                       A-3

<PAGE>

               [Private Placement Legend: Each Warrant issued pursuant to an
exemption from the registration requirements of the Securities Act shall bear
the following legend on the reverse thereof:]

        "THIS SECURITY AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS
        SECURITY HAVE NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933,
        AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED,
        SOLD, PLEDGED OR OTHERWISE TRANSFERRED WITHIN THE UNITED STATES OR TO,
        OR FOR THE ACCOUNT OR BENEFIT OF, U.S. PERSONS, EXCEPT AS SET FORTH IN
        THE NEXT SENTENCE HEREOF. BY ITS ACQUISITION HEREOF OR OF A BENEFICIAL
        INTEREST HEREIN, THE HOLDER:

               (1) REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL BUYER"
               (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT)(A "QIB") OR
               (B) IT IS AN INSTITUTIONAL "ACCREDITED INVESTOR" (AS DEFINED IN
               RULE 501(A)(1), (2), (3) OR (7) OF REGULATION D UNDER THE
               SECURITIES ACT (AN "IAI"),

               (2) AGREES THAT IT WILL NOT RESELL OR OTHERWISE TRANSFER THIS
               SECURITY EXCEPT (A) TO THE COMPANY OR ANY OF ITS SUBSIDIARIES,
               (B) TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QIB
               PURCHASING FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QIB IN A
               TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (C) IN A
               TRANSACTION MEETING THE REQUIREMENTS OF RULE 144 UNDER THE
               SECURITIES ACT, (D) TO AN IAI THAT, PRIOR TO SUCH TRANSFER,
               FURNISHES THE WARRANT AGENT A SIGNED LETTER CONTAINING CERTAIN
               REPRESENTATIONS AND AGREEMENTS RELATING TO THE TRANSFER OF THIS
               SECURITY (THE FORM OF WHICH CAN BE OBTAINED FROM THE WARRANT
               AGENT) AND, IF THE COMPANY SO REQUESTS, AN OPINION OF COUNSEL
               ACCEPTABLE TO THE COMPANY THAT SUCH TRANSFER IS IN COMPLIANCE
               WITH THE SECURITIES ACT, (E) IN ACCORDANCE WITH ANOTHER EXEMPTION
               FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT (AND
               BASED UPON AN OPINION OF COUNSEL ACCEPTABLE TO THE COMPANY) OR
               (F) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT AND, IN EACH
               CASE, IN ACCORDANCE WITH THE APPLICABLE SECURITIES LAWS OF ANY
               STATE OF THE

                                       A-4

<PAGE>

               UNITED STATES OR ANY OTHER APPLICABLE JURISDICTION, AND

               (3) AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THIS NOTE
               OR AN INTEREST HEREIN IS TRANSFERRED A NOTICE SUBSTANTIALLY TO
               THE EFFECT OF THIS LEGEND.

               The Warrants evidenced by this Warrant Certificate are part of a
duly authorized issue of Warrants expiring at 5:00 p.m., New York City time, on
the Expiration Date, entitling the holder on exercise to receive shares of
Common Stock, and are issued or to be issued pursuant to a Warrant Agreement,
dated as of August 22, 2002 (the "WARRANT AGREEMENT"), duly executed and
delivered by the Company to U.S. Bank, N.A., as warrant agent (the "WARRANT
AGENT"), which Warrant Agreement is hereby incorporated by reference in and made
a part of this instrument and is hereby referred to for a description of the
rights, limitation of rights, obligations, duties and immunities thereunder of
the Warrant Agent, the Company and the holders (the words "HOLDERS" or "HOLDER"
meaning the registered holders or registered holder) of the Warrants. A copy of
the Warrant Agreement may be obtained by the holder hereof upon written request
to the Company.

               Warrants may be exercised commencing at the opening of business
on the Exercise Date and until 5:00 p.m., New York City time, on the Expiration
Date, provided that holders shall be able to exercise their Warrants only if a
Registration Statement relating to the exercise of the Warrants is then in
effect, or the exercise of such Warrants is exempt from the registration
requirements of the Securities Act of 1933, as amended (the "SECURITIES ACT"),
and such securities are qualified for sale or exempt from qualification under
the applicable securities laws of the states in which the various holders of the
Warrants or other Persons to whom it is proposed that the Warrant Shares be
issued on exercise of the Warrants reside. In order to exercise all or any of
the Warrants represented by this Warrant Certificate, the holder must deliver to
the Warrant Agent at the address set forth in Section 15 of the Warrant
Agreement or at the Warrant Agent's New York corporate trust office this Warrant
Certificate and the form of election to purchase included in this Warrant
Certificate duly filled in and signed, which signature shall be medallion
guaranteed by an institution which is a member of one of the following
recognized signature guarantee programs: (i) The Securities Transfer Agent
Medallion Program (STAMP); (ii) the New York Stock Exchange Medallion Program
(MNSP); (iii) the Stock Exchange Medallion Program (SEMP); or (iv) such other
guarantee program acceptable to the Warrant Agent, and payment to the Warrant
Agent for the account of the Company of the Exercise Price, as adjusted as
provided in the Warrant Agreement, for the number of Warrant Shares in respect
of which such Warrant is then exercised.

               The Warrant Agreement provides that upon the occurrence of
certain events the Exercise Price set forth on the face hereof may, subject to
certain

                                       A-5

<PAGE>

conditions, be adjusted. If the Exercise Price is adjusted, the Warrant
Agreement provides that the number of shares of Common Stock issuable upon the
exercise of each Warrant shall be adjusted. No fractions of a share of Common
Stock will be issued upon the exercise of any Warrant, but the Company, at its
option, will pay the cash value thereof determined or round to the next full
share of Common Stock, as provided in the Warrant Agreement. No adjustment shall
be made for any dividends on any Common Stock issuable upon exercise of this
Warrant.

               Warrant Certificates, when surrendered at the office of the
Warrant Agent by the registered holder thereof in person or by legal
representative or attorney duly authorized in writing, may be exchanged, in the
manner and subject to the limitations provided in the Warrant Agreement, but
without payment of any service charge, for another Warrant Certificate or
Warrant Certificates of like tenor evidencing in the aggregate a like number of
Warrants.

               Upon due presentation for registration of transfer of this
Warrant Certificate at the office of the Warrant Agent, a new Warrant
Certificate or Warrant Certificates of like tenor and evidencing in the
aggregate a like number of Warrants shall be issued to the transferee(s) in
exchange for this Warrant Certificate, subject to the limitations provided in
the Warrant Agreement, without charge except for any tax or other governmental
charge imposed in connection therewith.

               The Company and the Warrant Agent may deem and treat the
registered holder(s) thereof as the absolute owner(s) of this Warrant
Certificate (notwithstanding any notation of ownership or other writing hereon
made by anyone), for the purpose of any exercise hereof, or any distribution to
the holder(s) hereof, and for all other purposes, and neither the Company nor
the Warrant Agent shall be affected by any notice to the contrary. Neither the
Warrants nor this Warrant Certificate entitles any holder hereof to any rights
of a stockholder of the Company.

                                       A-6

<PAGE>

                         [Form of Election to Purchase]

                     (To Be Executed Upon Exercise Of Warrant)

               The undersigned hereby irrevocably elects to exercise the right,
represented by this Warrant Certificate, to receive _____________ shares of
Common Stock and herewith tenders payment for such shares to the order of
Orbital Sciences Corporation, in the amount of $__________ in accordance with
the terms hereof or the tender of $________ aggregate principal amount of Notes
in accordance with the terms hereunder. The undersigned requests that a
certificate for such shares be registered in the name of _______________, whose
address is __________________ and that such shares be delivered to ___________,
whose address is ____________________________. If said number of shares is less
than all of the shares of Common Stock purchasable upon exercise of the
Warrant(s) represented by this Warrant Certificate, the undersigned requests
that a new Warrant Certificate representing the number of Warrants exercisable
for the remaining balance of such shares be registered in the name of
______________________, whose address is ____________________, and that such
Warrant Certificate be delivered to _______________________________ whose
address is ___________________.

                                            -------------------------------
                                            Signature

Date:
       ---------------------

        ----------------------------------------
        Signature Guaranteed*

*NOTICE: The Signature must be guaranteed by an Institution which is a member of
one of the following recognized signature Guarantee Programs: (i) The Securities
Transfer Agent Medallion Program (STAMP); (ii) The New York Stock Exchange
Medallion Program (MNSP); (iii) The Stock Exchange Medallion Program (SEMP); or
(iv) such other guarantee program acceptable to the Trustee.

                                       A-7

<PAGE>

                    [TO BE INCLUDED ONLY ON GLOBAL WARRANTS]

                       SCHEDULE OF EXCHANGES OF INTERESTS
                               OF GLOBAL WARRANTS

The initial number of warrants evidenced by this Global Warrant is ______. The
following exchanges of a part of this Global Warrant have been made:

<TABLE>
<S>              <C>               <C>                    <C>                  <C>
                     Amount of                                Number of
                    Decrease in                            Warrants in this
                     Number of          Amount of           Global Warrant      Signature of
                    Warrants in     Increase in Number      Following Such       Authorized
     Date of        this Global    of Warrants in this       Decrease or         Officer of
     Exchange         Warrant         Global Warrant           Increase        Warrant Agent
----------------------------------------------------------------------------------------------
</TABLE>

                                       A-8

<PAGE>

                                    EXHIBIT B

                         FORM OF CERTIFICATE OF TRANSFER

Orbital Sciences Corporation
21839 Atlantic Boulevard
Dulles, VA  20166
Attention: General Counsel
Facsimile: (703) 406-5572

U.S. Bank, N.A.
180 East 5th Street
St. Paul, MN 55101
Facsimile:  (651)244-8677
Attention:  Corporate Trust Department

           RE:  WARRANTS

                  Reference is hereby made to the Warrant Agreement, dated as of
August 22, 2002 (the "WARRANT AGREEMENT"), between Orbital Sciences Corporation,
as issuer (the "COMPANY"), and U.S. Bank N.A., as warrant agent. Capitalized
terms used but not defined herein shall have the meanings given to them in the
Warrant Agreement.

                  __________________, (the "TRANSFEROR") owns and proposes to
transfer the Warrant[s] or interest in such Warrant[s] specified in Annex A
hereto, in the amount of $__________ in such Warrant[s] or interests (the
"TRANSFER"), to _____________________ (the "TRANSFEREE"), as further specified
in Annex A hereto. In connection with the Transfer, the Transferor hereby
certifies that:

                              [CHECK ALL THAT APPLY]

          1. [ ] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL INTEREST
IN THE 144A GLOBAL WARRANT OR A DEFINITIVE WARRANT PURSUANT TO RULE 144A. The
Transfer is being effected pursuant to and in accordance with Rule 144A under
the United States Securities Act of 1933, as amended (the "Securities Act"),
and, accordingly, the Transferor hereby further certifies that the beneficial
interest or Definitive Warrant is being transferred to a Person that the
Transferor reasonably believed and believes is purchasing the beneficial
interest or Definitive Warrant for its own account, or for one or more accounts
with respect to which such Person exercises sole investment discretion, and such
Person and each such account is a "qualified institutional buyer" within the
meaning of Rule 144A in a transaction

                                       B-1

<PAGE>

meeting the requirements of Rule 144A and such Transfer is in compliance with
any applicable blue sky securities laws of any state of the United States. Upon
consummation of the proposed Transfer in accordance with the terms of the
Warrant Agreement, the transferred beneficial interest or Definitive Warrant
will be subject to the restrictions on transfer enumerated in the Private
Placement Legend printed on the 144A Global Warrant and/or the Definitive
Warrant and in the Warrant Agreement and the Securities Act.

          2. [ ] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL INTEREST
IN THE RULE 501 GLOBAL WARRANT OR A DEFINITIVE WARRANT AS AN INSTITUTIONAL
ACCREDITED INVESTOR. The Transfer is being effected to an Institutional
Accredited Investor and pursuant to an exemption from the registration
requirements of the Securities Act other than Rule 144A, or Rule 144, and the
Transferor hereby further certifies that it has not engaged in any general
solicitation within the meaning of Regulation D under the Securities Act and the
Transfer complies with the transfer restrictions applicable to beneficial
interests in a Restricted Global Warrant or Restricted Definitive Warrant and
the requirements of the exemption claimed, which certification is supported by
(1) a certificate executed by the Transferee in a form of Exhibit D to the
Indenture and (2) if such Transfer is in respect of a principal amount of
Warrants at the time of transfer of less than $250,000, an Opinion of Counsel
provided by the Transferor or the Transferee (a copy of which the Transferor has
attached to this certification and provided to the Company, which has confirmed
its acceptability), to the effect that such Transfer is in compliance with the
Securities Act. Upon consummation of the proposed Transfer in accordance with
the terms of the Warrant Purchase Agreement, the Definitive Warrant will be
subject to the restrictions on transfer enumerated in the Private Placement
Legend printed on the Definitive Warrant and in the Warrant Purchase Agreement
and the Securities Act.

          3. [ ] CHECK AND COMPLETE IF TRANSFEREE WILL TAKE DELIVERY OF A
BENEFICIAL INTEREST IN A DEFINITIVE WARRANT PURSUANT TO ANY PROVISION OF THE
SECURITIES ACT OTHER THAN RULE 144A OR TO AN INSTITUTIONAL ACCREDITED INVESTOR.
The Transfer is being effected in compliance with the transfer restrictions
applicable to beneficial interests in Restricted Global Warrants and Restricted
Definitive Warrants and pursuant to and in accordance with the Securities Act
and any applicable blue sky securities laws of any state of the United States,
and accordingly the Transferor hereby further certifies that (check one):

        (a) [ ] such Transfer is being effected pursuant to and in accordance
        with Rule 144 under the Securities Act;

                                       or

        (b) [ ] such Transfer is being effected to the Company or a subsidiary
        thereof;

                                       B-2

<PAGE>

                                       or

        (c) [ ] such Transfer is being effected pursuant to an effective
        registration statement under the Securities Act and in compliance with
        the prospectus delivery requirements of the Securities Act.

        4.  [ ] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL
INTEREST IN AN UNRESTRICTED GLOBAL WARRANT OR OF AN UNRESTRICTED DEFINITIVE
WARRANT.

        (a) [ ] CHECK IF TRANSFER IS PURSUANT TO RULE 144. (i) The Transfer is
        being effected pursuant to and in accordance with Rule 144 under the
        Securities Act and in compliance with the transfer restrictions
        contained in the Warrant Agreement and any applicable blue sky
        securities laws of any state of the United States and (ii) the
        restrictions on transfer contained in the Warrant Agreement and the
        Private Placement Legend are not required in order to maintain
        compliance with the Securities Act. Upon consummation of the proposed
        Transfer in accordance with the terms of the Warrant Agreement, the
        transferred beneficial interest or Definitive Warrant will no longer be
        subject to the restrictions on transfer enumerated in the Private
        Placement Legend printed on the Restricted Global Warrants, on
        Restricted Definitive Warrants and in the Warrant Agreement.

        (b) [ ] CHECK IF TRANSFER IS PURSUANT TO OTHER EXEMPTION. (i) The
        Transfer is being effected pursuant to and in compliance with an
        exemption from the registration requirements of the Securities Act other
        than Rule 144 and in compliance with the transfer restrictions contained
        in the Warrant Agreement and any applicable blue sky securities laws of
        any State of the United States and (ii) the restrictions on transfer
        contained in the Warrant Agreement and the Private Placement Legend are
        not required in order to maintain compliance with the Securities Act.
        Upon consummation of the proposed Transfer in accordance with the terms
        of the Warrant Agreement, the transferred beneficial interest or
        Definitive Warrant will not be subject to the restrictions on transfer
        enumerated in the Private Placement Legend printed on the Restricted
        Global Warrants or Restricted Definitive Warrants and in the Warrant
        Agreement.

                       [Signature page follows this page]

                                       B-3

<PAGE>

               This certificate and the statements contained herein are made for
your benefit and the benefit of the Company.

                                            [Insert Name of Transferor]

                                            By:
                                               --------------------------------
                                                  Name:
                                                  Title:

Dated:
      -------------

                                       B-4

<PAGE>

                       ANNEX A TO CERTIFICATE OF TRANSFER

1.  The Transferor owns and proposes to transfer the following:

                             [CHECK ONE OF (a) OR (b)]

        (a)    [ ]     a beneficial interest in the:

               (i)     [ ]      144A Global Warrant, or

               (ii)    [ ]      Rule 501 Global Warrant; or

        (b)    [ ]     a Restricted Definitive Warrant.

2.  After the Transfer the Transferee will hold:

                                    [CHECK ONE]

        (a)    [ ]     a beneficial interest in the:

               (i)     [ ]      144A Global Warrant, or

               (ii)    [ ]      Rule 501 Global Warrant, or

               (ii)    [ ]      Unrestricted Global Warrant; or

        (b)    [ ]     a Restricted Definitive Warrant; or

        (c)    [ ]     an Unrestricted Definitive Warrant,

        in accordance with the terms of the Warrant Agreement.

                                       B-5

<PAGE>

                                    EXHIBIT C

                         FORM OF CERTIFICATE OF EXCHANGE

Orbital Sciences Corporation
21839 Atlantic Boulevard
Dulles, VA  20166
Facsimile: (703) 406-5572
Attention:  General Counsel

U.S. Bank, N.A.
180 East 5th Street
St. Paul, MN 55101
Facsimile:  (651) 244-0711
Attention:  Corporate Trust Department

           RE:  WARRANTS
                              (CUSIP ____________)

               Reference is hereby made to the Warrant Agreement, dated as of
August 22, 2002 (the "WARRANT AGREEMENT"), between Orbital Sciences Corporation,
as issuer (the "COMPANY"), and U.S. Bank, N.A., as warrant agent. Capitalized
terms used but not defined herein shall have the meanings given to them in the
Warrant Agreement.

               __________________________, (the "OWNER") owns and proposes to
exchange the Warrant[s] or interest in such Warrant[s] specified herein, in the
amount of $____________ in such Warrant[s] or interests (the "EXCHANGE"). In
connection with the Exchange, the Owner hereby certifies that:

          1.   EXCHANGE OF RESTRICTED DEFINITIVE WARRANTS OR BENEFICIAL
INTERESTS IN A RESTRICTED GLOBAL WARRANT FOR UNRESTRICTED DEFINITIVE WARRANTS
OR BENEFICIAL INTERESTS IN AN UNRESTRICTED GLOBAL WARRANT

        (a)  [ ] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A RESTRICTED
        GLOBAL WARRANT TO BENEFICIAL INTEREST IN AN UNRESTRICTED GLOBAL WARRANT.
        In connection with the Exchange of the Owner's beneficial interest in a
        Restricted Global Warrant for a beneficial interest in an Unrestricted
        Global Warrant in an equal principal amount, the Owner hereby certifies
        (i) the beneficial interest is being acquired for the Owner's own
        account without transfer, (ii) such Exchange has been effected in
        compliance with the transfer restrictions applicable to the Global
        Warrants and pursuant to and in accordance with the United States
        Securities Act of 1933, as amended (the "Securities Act"), (iii) the
        restrictions on transfer

                                       C-1

<PAGE>

        contained in the Warrant Agreement and the Private Placement Legend are
        not required in order to maintain compliance with the Securities Act and
        (iv) the beneficial interest in an Unrestricted Global Warrant is being
        acquired in compliance with any applicable blue sky securities laws of
        any state of the United States.

        (b) [ ] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A RESTRICTED
        GLOBAL WARRANT TO UNRESTRICTED DEFINITIVE WARRANT. In connection with
        the Exchange of the Owner's beneficial interest in a Restricted Global
        Warrant for an Unrestricted Definitive Warrant, the Owner hereby
        certifies (i) the Definitive Warrant is being acquired for the Owner's
        own account without transfer, (ii) such Exchange has been effected in
        compliance with the transfer restrictions applicable to the Restricted
        Global Warrants and pursuant to and in accordance with the Securities
        Act, (iii) the restrictions on transfer contained in the Warrant
        Agreement and the Private Placement Legend are not required in order to
        maintain compliance with the Securities Act and (iv) the Definitive
        Warrant is being acquired in compliance with any applicable blue sky
        securities laws of any state of the United States.

        (c) [ ] CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE WARRANT TO
        BENEFICIAL INTEREST IN AN UNRESTRICTED GLOBAL WARRANT. In connection
        with the Owner's Exchange of a Restricted Definitive Warrant for a
        beneficial interest in an Unrestricted Global Warrant, the Owner hereby
        certifies (i) the beneficial interest is being acquired for the Owner's
        own account without transfer, (ii) such Exchange has been effected in
        compliance with the transfer restrictions applicable to Restricted
        Definitive Warrants and pursuant to and in accordance with the
        Securities Act, (iii) the restrictions on transfer contained in the
        Warrant Agreement and the Private Placement Legend are not required in
        order to maintain compliance with the Securities Act and (iv) the
        beneficial interest is being acquired in compliance with any applicable
        blue sky securities laws of any state of the United States.

        (d) [ ] CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE WARRANT TO
        UNRESTRICTED DEFINITIVE WARRANT. In connection with the Owner's Exchange
        of a Restricted Definitive Warrant for an Unrestricted Definitive
        Warrant, the Owner hereby certifies (i) the Unrestricted Definitive
        Warrant is being acquired for the Owner's own account without transfer,
        (ii) such Exchange has been effected in compliance with the transfer
        restrictions applicable to Restricted Definitive Warrants and pursuant
        to and in accordance with the Securities Act, (iii) the restrictions on
        transfer contained in the Warrant Agreement and the Private Placement
        Legend are not required in order to maintain compliance with the
        Securities Act and (iv) the Unrestricted Definitive Warrant is being
        acquired in compliance with any applicable blue sky securities laws of
        any state of the United States.

                                       C-2

<PAGE>

          2.   EXCHANGE OF RESTRICTED DEFINITIVE WARRANTS OR BENEFICIAL
INTERESTS IN RESTRICTED GLOBAL WARRANTS FOR RESTRICTED DEFINITIVE WARRANTS OR
BENEFICIAL INTERESTS IN RESTRICTED GLOBAL WARRANTS

        (a) [ ] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A RESTRICTED
        GLOBAL WARRANT TO RESTRICTED DEFINITIVE WARRANT. In connection with the
        Exchange of the Owner's beneficial interest in a Restricted Global
        Warrant for a Restricted Definitive Warrant in a number equal to the
        number of beneficial interests exchanged, the Owner hereby certifies
        that the Restricted Definitive Warrant is being acquired for the Owner's
        own account without transfer. Upon consummation of the proposed Exchange
        in accordance with the terms of the Warrant Agreement, the Restricted
        Definitive Warrant issued will continue to be subject to the
        restrictions on transfer enumerated in the Private Placement Legend
        printed on the Restricted Definitive Warrant and in the Warrant
        Agreement and the Securities Act.

        (b) CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE WARRANT TO
        BENEFICIAL INTEREST IN A RESTRICTED GLOBAL WARRANT. In connection with
        the Exchange of the Owner's Restricted Definitive Warrant for a
        beneficial interest in the [CHECK ONE] [ ] 144A Global Warrant, [ ] Rule
        501 Global Warrant, in a number equal to the number of beneficial
        interests exchanged, the Owner hereby certifies (i) the beneficial
        interest is being acquired for the Owner's own account without transfer
        and (ii) such Exchange has been effected in compliance with the transfer
        restrictions applicable to the Restricted Global Warrants and pursuant
        to and in accordance with the Securities Act, and in compliance with any
        applicable blue sky securities laws of any state of the United States.
        Upon consummation of the proposed Exchange in accordance with the terms
        of the Warrant Agreement, the beneficial interest issued will be subject
        to the restrictions on transfer enumerated in the Private Placement
        Legend printed on the relevant Restricted Global Warrant and in the
        Warrant Agreement and the Securities Act.

                       [Signature page follows this page]

                                       C-3

<PAGE>

               This certificate and the statements contained herein are made for
your benefit and the benefit of the Company.

                                            [Insert Name of Transferor]

                                            By:
                                               --------------------------------
                                                  Name:
                                                  Title:

Dated:
      ------------

                                       C-4

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