Exhibit 10.33

                                                                  EXECUTION COPY

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                         L-3 COMMUNICATIONS CORPORATION,
                                    As Issuer

                    6-1/8% SENIOR SUBORDINATED NOTES DUE 2014

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

                                    INDENTURE

                          Dated as of December 22, 2003

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

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

                              The Bank of New York,
                                   As Trustee

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

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                                TABLE OF CONTENTS

ARTICLE 1. DEFINITIONS AND INCORPORATION BY REFERENCE.............................................................2

   SECTION 1.01       DEFINITIONS.................................................................................2
   SECTION 1.02       OTHER DEFINITIONS..........................................................................19
   SECTION 1.03       INCORPORATION BY REFERENCE OF TRUST INDENTURE ACT..........................................20
   SECTION 1.04       RULES OF CONSTRUCTION......................................................................20

ARTICLE 2. THE NOTES.............................................................................................21

   SECTION 2.01       FORM AND DATING............................................................................21
   SECTION 2.02       EXECUTION AND AUTHENTICATION...............................................................21
   SECTION 2.03       REGISTRAR AND PAYING AGENT.................................................................22
   SECTION 2.04       PAYING AGENT TO HOLD MONEY IN TRUST........................................................22
   SECTION 2.05       HOLDER LISTS...............................................................................23
   SECTION 2.06       TRANSFER AND EXCHANGE......................................................................23
   SECTION 2.07       REPLACEMENT NOTES..........................................................................35
   SECTION 2.08       OUTSTANDING NOTES..........................................................................36
   SECTION 2.09       TREASURY NOTES.............................................................................36
   SECTION 2.10       TEMPORARY NOTES............................................................................36
   SECTION 2.11       CANCELLATION...............................................................................36
   SECTION 2.12       DEFAULTED INTEREST.........................................................................37
   SECTION 2.13       CUSIP NUMBERS..............................................................................37

ARTICLE 3. REDEMPTION AND PREPAYMENT.............................................................................37

   SECTION 3.01       NOTICES TO TRUSTEE.........................................................................37
   SECTION 3.02       SELECTION OF NOTES TO BE REDEEMED..........................................................37
   SECTION 3.03       NOTICE OF REDEMPTION.......................................................................38
   SECTION 3.04       EFFECT OF NOTICE OF REDEMPTION.............................................................39
   SECTION 3.05       DEPOSIT OF REDEMPTION PRICE................................................................39
   SECTION 3.06       NOTES REDEEMED IN PART.....................................................................39
   SECTION 3.07       OPTIONAL REDEMPTION........................................................................39
   SECTION 3.08       MANDATORY REDEMPTION.......................................................................40
   SECTION 3.09       OFFER TO PURCHASE BY APPLICATION OF EXCESS PROCEEDS........................................40

ARTICLE 4. COVENANTS.............................................................................................42

   SECTION 4.01       PAYMENT OF NOTES...........................................................................42
   SECTION 4.02       MAINTENANCE OF OFFICE OR AGENCY............................................................42
   SECTION 4.03       REPORTS....................................................................................43
   SECTION 4.04       COMPLIANCE CERTIFICATE.....................................................................43
   SECTION 4.05       TAXES......................................................................................44
   SECTION 4.06       STAY, EXTENSION AND USURY LAWS.............................................................44
   SECTION 4.07       RESTRICTED PAYMENTS........................................................................45
   SECTION 4.08       DIVIDEND AND OTHER PAYMENT RESTRICTIONS AFFECTING RESTRICTED SUBSIDIARIES..................47
   SECTION 4.09       INCURRENCE OF INDEBTEDNESS AND ISSUANCE OF PREFERRED STOCK.................................48
   SECTION 4.10       ASSET SALES................................................................................51
   SECTION 4.11       TRANSACTIONS WITH AFFILIATES...............................................................52
   SECTION 4.12       LIENS......................................................................................52
   SECTION 4.13       FUTURE SUBSIDIARY GUARANTEES...............................................................53

                                       i

   SECTION 4.14       CORPORATE EXISTENCE........................................................................54
   SECTION 4.15       OFFER TO REPURCHASE UPON CHANGE OF CONTROL.................................................54
   SECTION 4.16       NO SENIOR SUBORDINATED DEBT................................................................55
   SECTION 4.17       PAYMENTS FOR CONSENT.......................................................................55
   SECTION 4.18       CHANGES IN COVENANTS WHEN NOTES RATED INVESTMENT GRADE.....................................56

ARTICLE 5. SUCCESSORS............................................................................................56

   SECTION 5.01       MERGER, CONSOLIDATION, OR SALE OF ASSETS...................................................56
   SECTION 5.02       SUCCESSOR CORPORATION SUBSTITUTED..........................................................57

ARTICLE 6. DEFAULTS AND REMEDIES.................................................................................58

   SECTION 6.01       EVENTS OF DEFAULT..........................................................................58
   SECTION 6.02       ACCELERATION...............................................................................59
   SECTION 6.03       OTHER REMEDIES.............................................................................60
   SECTION 6.04       WAIVER OF PAST DEFAULTS....................................................................60
   SECTION 6.05       CONTROL BY MAJORITY........................................................................61
   SECTION 6.06       LIMITATION ON SUITS........................................................................61
   SECTION 6.07       RIGHTS OF HOLDERS OF NOTES TO RECEIVE PAYMENT..............................................61
   SECTION 6.08       COLLECTION SUIT BY TRUSTEE.................................................................62
   SECTION 6.09       TRUSTEE MAY FILE PROOFS OF CLAIM...........................................................62
   SECTION 6.10       PRIORITIES.................................................................................62
   SECTION 6.11       UNDERTAKING FOR COSTS......................................................................63

ARTICLE 7. TRUSTEE...............................................................................................63

   SECTION 7.01       DUTIES OF TRUSTEE..........................................................................63
   SECTION 7.02       RIGHTS OF TRUSTEE..........................................................................64
   SECTION 7.03       INDIVIDUAL RIGHTS OF TRUSTEE...............................................................65
   SECTION 7.04       TRUSTEE'S DISCLAIMERS......................................................................65
   SECTION 7.05       NOTICE OF DEFAULTS.........................................................................66
   SECTION 7.06       REPORTS BY TRUSTEE TO HOLDERS OF THE NOTES.................................................66
   SECTION 7.07       COMPENSATION AND INDEMNITY.................................................................66
   SECTION 7.08       REPLACEMENT OF TRUSTEE.....................................................................67
   SECTION 7.09       SUCCESSOR TRUSTEE BY MERGER, ETC...........................................................68
   SECTION 7.10       ELIGIBILITY; DISQUALIFICATION..............................................................68
   SECTION 7.11       PREFERENTIAL COLLECTION OF CLAIMS AGAINST COMPANY..........................................68

ARTICLE 8. LEGAL DEFEASANCE AND COVENANT DEFEASANCE..............................................................68

   SECTION 8.01       OPTION TO EFFECT LEGAL DEFEASANCE OR COVENANT DEFEASANCE...................................68
   SECTION 8.02       LEGAL DEFEASANCE AND DISCHARGE.............................................................68
   SECTION 8.03       COVENANT DEFEASANCE........................................................................69
   SECTION 8.04       CONDITIONS TO LEGAL OR COVENANT DEFEASANCE.................................................69
   SECTION 8.05       DEPOSITED MONEY AND GOVERNMENT SECURITIES TO BE HELD IN TRUST; OTHER MISCELLANEOUS
                           PROVISIONS............................................................................71
   SECTION 8.06       REPAYMENT TO COMPANY.......................................................................71
   SECTION 8.07       REINSTATEMENT..............................................................................72

ARTICLE 9. AMENDMENT, SUPPLEMENT AND WAIVER......................................................................72

   SECTION 9.01       WITHOUT CONSENT OF HOLDERS OF NOTES........................................................72
   SECTION 9.02       WITH CONSENT OF HOLDERS OF NOTES...........................................................73

                                       ii

   SECTION 9.03       COMPLIANCE WITH TRUST INDENTURE ACT........................................................74
   SECTION 9.04       REVOCATION AND EFFECT OF CONSENTS..........................................................74
   SECTION 9.05       NOTATION ON OR EXCHANGE OF NOTES...........................................................75
   SECTION 9.06       TRUSTEE TO SIGN AMENDMENTS, ETC............................................................75

ARTICLE 10. SUBSIDIARY GUARANTEES................................................................................75

   SECTION 10.01      AGREEMENT TO GUARANTEE.....................................................................75
   SECTION 10.02      EXECUTION AND DELIVERY OF SUBSIDIARY GUARANTEES............................................76
   SECTION 10.03      GUARANTORS MAY CONSOLIDATE, ETC. ON CERTAIN TERMS..........................................77
   SECTION 10.04      RELEASES...................................................................................78
   SECTION 10.05      NO RECOURSE AGAINST OTHERS.................................................................79
   SECTION 10.06      SUBORDINATION OF SUBSIDIARY GUARANTEES.....................................................79

ARTICLE 11. SUBORDINATION........................................................................................79

   SECTION 11.01      AGREEMENT TO SUBORDINATE...................................................................79
   SECTION 11.02      LIQUIDATION; DISSOLUTION; BANKRUPTCY.......................................................79
   SECTION 11.03      DEFAULT ON DESIGNATED SENIOR DEBT..........................................................79
   SECTION 11.04      ACCELERATION OF SECURITIES.................................................................80
   SECTION 11.05      WHEN DISTRIBUTION MUST BE PAID OVER........................................................80
   SECTION 11.06      NOTICE BY COMPANY..........................................................................81
   SECTION 11.07      SUBROGATION................................................................................81
   SECTION 11.08      RELATIVE RIGHTS............................................................................81
   SECTION 11.09      SUBORDINATION MAY NOT BE IMPAIRED BY COMPANY...............................................82
   SECTION 11.10      DISTRIBUTION OR NOTICE TO REPRESENTATIVE...................................................82
   SECTION 11.11      RIGHTS OF TRUSTEE AND PAYING AGENT.........................................................82
   SECTION 11.12      AUTHORIZATION TO EFFECT SUBORDINATION......................................................83
   SECTION 11.13      AMENDMENTS.................................................................................83

ARTICLE 12. MISCELLANEOUS........................................................................................83

   SECTION 12.01      TRUST INDENTURE ACT CONTROLS...............................................................83
   SECTION 12.02      NOTICES....................................................................................83
   SECTION 12.03      COMMUNICATIONS BY HOLDERS OF NOTES WITH OTHER HOLDERS OF NOTES.............................84
   SECTION 12.04      CERTIFICATE AND OPINION AS TO CONDITIONS PRECEDENT.........................................84
   SECTION 12.05      STATEMENTS REQUIRED IN CERTIFICATE OR OPINION..............................................85
   SECTION 12.06      RULE BY TRUSTEE AND AGENTS.................................................................85
   SECTION 12.07      NO PERSONAL LIABILITY OF DIRECTORS, OFFICERS, EMPLOYEES AND STOCKHOLDERS...................85
   SECTION 12.08      GOVERNING LAW..............................................................................85
   SECTION 12.09      NO ADVERSE INTERPRETATION OF OTHER AGREEMENTS..............................................86
   SECTION 12.10      SUCCESSORS.................................................................................86
   SECTION 12.11      SEVERABILITY...............................................................................86
   SECTION 12.12      COUNTERPART ORIGINALS......................................................................86
   SECTION 12.13      TABLE OF CONTENTS, HEADINGS, ETC...........................................................86

                                      iii

                          EXHIBITS

EXHIBIT A            FORM OF NOTE

EXHIBIT B            FORM OF CERTIFICATE OF TRANSFER

EXHIBIT C            FORM OF CERTIFICATE OF EXCHANGE

EXHIBIT D            FORM OF CERTIFICATE FROM ACQUIRING INSTITUTIONAL ACCREDITED
                     INVESTORS

EXHIBIT E            FORM OF SUPPLEMENTAL INDENTURE

EXHIBIT F            FORM OF NOTATION ON SENIOR SUBORDINATED NOTE RELATING TO
                     SUBSIDIARY GUARANTEE

                                       iv

                             Cross-Reference Table*

Trust Indenture                                                   Indenture
Act Section                                                        Section
310   (a)(1)..........................................              7.10
      (a)(2)..........................................              7.10
      (a)(3)..........................................              N.A.
      (a)(4)..........................................              N.A.
      (a)(5)..........................................              7.10
      (b).............................................              7.10
      (c).............................................              N.A.
311   (a).............................................              7.11
      (b).............................................              7.11
      (c).............................................              N.A.
312   (a).............................................              2.05
      (b).............................................              12.03
      (c).............................................              12.03
313   (a).............................................              7.06
      (b)(1)..........................................              11.03
      (b)(2)..........................................              7.07
      (c).............................................           7.06;12.02
      (d).............................................              7.06
314   (a).............................................           4.03;12.02
      (b).............................................              11.02
      (c)(1)..........................................              12.04
      (c)(2)..........................................              12.04
      (c)(3)..........................................              N.A.
      (d).............................................       11.03, 11.04, 11.05
      (e).............................................              12.05
      (f).............................................              N.A.
315   (a).............................................              7.01
      (b).............................................           7.05, 12.02
      (c).............................................              7.01
      (d).............................................              7.01
      (e).............................................              6.11
316   (a)(last sentence)..............................              2.09
      (a)(1)(A).......................................              6.05
      (a)(1)(B).......................................              6.04
      (a)(2)..........................................              N.A.
      (b).............................................              6.07
      (c).............................................              2.12
317   (a)(1)..........................................              6.08

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*  This Cross-Reference Table is not part of the Indenture.

                                       v

      (a)(2)..........................................              6.09
      (b).............................................              2.04
318   (a).............................................              12.01
      (b).............................................              N.A.
      (c).............................................              12.01

N.A. means not applicable.

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*  This Cross-Reference Table is not part of the Indenture.

                                       vi

         This INDENTURE, dated as of December 22, 2003, among Apcom, Inc., a
Maryland corporation, Broadcast Sports Inc., a Delaware corporation,
Electrodynamics, Inc., an Arizona corporation, Henschel Inc., a Delaware
corporation, Hygienetics Environmental Services, Inc., a Delaware corporation,
Interstate Electronics Corporation, a California corporation, KDI Precision
Products, Inc., a Delaware corporation, L-3 Communications Aeromet, Inc., an
Oregon corporation, L-3 Communications Aerotech LLC, a Delaware limited
liability company, L-3 Communications AIS GP Corporation, a Delaware
corporation, L-3 Communications Atlantic Science and Technology Corporation, a
New Jersey corporation, L-3 Communications Avionics Systems, Inc., a Delaware
corporation, L-3 Communications Aydin Corporation, a Delaware corporation, L-3
Communications Corporation, a Delaware corporation, L-3 Communications CSI,
Inc., a California corporation, L-3 Communications ESSCO, Inc., a Delaware
corporation, L-3 Communications Flight International Aviation LLC, a Delaware
limited liability company, L-3 Communications Flight Capital LLC, a Delaware
limited liability company, L-3 Communications Government Services, Inc., a
Virginia corporation, L-3 Communications ILEX Systems, Inc., a Delaware
corporation, L-3 Communications IMC Corporation, a Connecticut corporation, L-3
Communications Integrated Systems L.P., a Delaware limited partnership, L-3
Communications Investments Inc., a Delaware corporation, L-3 Communications
Klein Associates, Inc., a Delaware corporation, L-3 Communications MAS (US)
Corporation, a Delaware corporation, L-3 Communications Security And Detection
Systems Corporation California, a California corporation, L-3 Communications
Security And Detection Systems Corporation Delaware, a Delaware corporation, L-3
Communications Storm Control Systems, Inc., a California corporation, L-3
Communications Vector International Aviation LLC, a Delaware limited liability
company, L-3 Communications TMA Corporation, a Virginia corporation, L-3
Communications Westwood Corporation, a Nevada corporation, MCTI Acquisition
Corporation, a Maryland corporation, Microdyne Communications Technologies
Incorporated, a Maryland corporation, Microdyne Corporation, a Maryland
corporation, Microdyne Outsourcing Incorporated, a Maryland corporation, MPRI,
Inc., a Delaware corporation, Pac Ord Inc., a Delaware corporation, Power
Paragon, Inc., a Delaware corporation, Ship Analytics, Inc., a Connecticut
corporation, Ship Analytics International, Inc., a Delaware corporation, Ship
Analytics USA, Inc., a Connecticut corporation, SPD Electrical Systems, Inc., a
Delaware corporation, SPD Switchgear Inc., a Delaware corporation, SYColeman
Corporation, a Florida corporation, Troll Technology Corporation, a California
corporation, Wescam Air Ops Inc., a Delaware corporation, Wescam Air Ops LLC, a
Delaware limited liability company, Wescam Holdings (US) Inc., a Delaware
corporation, Wescam Incorporated, a Florida corporation, Wescam LLC, a Delaware
limited liability company, Wescam Sonoma Inc., a California corporation and Wolf
Coach, Inc., a Massachusetts corporation (collectively, the "Guarantors"), and
The Bank of New York, as trustee (the "Trustee").

                  The Company and the Trustee agree as follows for the benefit
of each other and for the equal and ratable benefit of the Holders of the 6-1/8%
Senior Subordinated Notes due 2014 (the "Series A Notes") and the 6-1/8% Senior
Subordinated Notes due 2014 (the "Exchange Notes" and, together with the Series
A Notes, the "Notes"):

                                   ARTICLE 1
                          DEFINITIONS AND INCORPORATION
                                  BY REFERENCE

Section 1.01      Definitions.

                  "144A Global Note" means the global note in the form of
Exhibit A hereto bearing the Global Note Legend and the Private Placement Legend
and deposited with and registered in the name of the Depositary or its nominee
that will be issued in a denomination equal to the outstanding principal amount
of the Notes sold in reliance on Rule 144A.

                  "2000 Convertible Notes" means the $300,000,000 in aggregate
principal amount of Holdings' 5.25% Convertible Senior Subordinated Notes due
2009, issued pursuant to the 2000 Convertible Note Indenture in November and
December of 2000 and guaranteed by the Company and the other guarantors thereof.

                  "2000 Convertible Note Indenture" means the indenture, dated
as of November 21, 2000, among The Bank of New York, as trustee, Holdings, the
Company, as a guarantor, and the other guarantors party thereto, with respect to
the 2000 Convertible Notes.

                  "2001 CODES" means the $420,000,000 in aggregate principal
amount of Holdings' 4.00% Senior Subordinated Convertible Contingent Debt
Securities (CODES) due 2011, issued pursuant to the 2001 CODES Indenture in
October and November 2001 and guaranteed by the Company and the other guarantors
thereof.

                  "2001 CODES Indenture" means the indenture, dated as of
October 24, 2001, among The Bank of New York, as trustee, Holdings, the Company,
as a guarantor, and the other guarantors party thereto, with respect to the 2001
CODES.

                  "2002 Indenture" means the indenture, dated as of June 28,
2002, among The Bank of New York, as trustee, the Company and the guarantors
party thereto, with respect to the 2002 Notes.

                  "2002 Notes" means the $750,000,000 in aggregate principal
amount of the Company's 7-5/8% Senior Subordinated Notes due 2012, issued
pursuant to the 2002 Indenture on June 28, 2002.

                  "Acquired Debt" means, with respect to any specified Person,
(i) Indebtedness of any other Person existing at the time such other Person is
merged with or into or became a Restricted Subsidiary of such specified Person,
including, without limitation, Indebtedness incurred in connection with, or in
contemplation of, such other Person merging with or into or becoming a
Restricted Subsidiary of such specified Person, and (ii) Indebtedness secured by
a Lien encumbering any asset acquired by such specified Person.

                  "Additional Interest" means all additional interest then owing
pursuant to Section 5 of the Registration Rights Agreement.

                                       2

                  "Additional Notes" means any Notes (other than the Initial
Notes) issued under this Indenture in accordance with Sections 2.02 and 4.09
hereof.

                  "Affiliate" of any specified Person means any other Person
directly or indirectly controlling or controlled by or under direct or indirect
common control with 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;
provided that beneficial ownership of 10% or more of the voting securities of a
Person shall be deemed to be control.

                  "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.

                  "Asset Sale" means (i) the sale, lease, conveyance or other
disposition of any assets or rights (including, without limitation, by way of a
sale and leaseback) other than sales of inventory in the ordinary course of
business (provided that the sale, lease, conveyance or other disposition of all
or substantially all of the assets of the Company and its Restricted
Subsidiaries taken as a whole shall be governed by the covenant contained in
Section 4.15 and/or the covenant contained in Section 5.01 and not by the
covenant contained in Section 4.10), and (ii) the issue or sale by the Company
or any of its Subsidiaries of Equity Interests of any of the Company's
Restricted Subsidiaries, in the case of either clause (i) or (ii), whether in a
single transaction or a series of related transactions (A) that have a fair
market value in excess of $5.0 million or (B) for net proceeds in excess of $5.0
million. Notwithstanding the foregoing: (i) a transfer of assets by the Company
to a Restricted Subsidiary or by a Restricted Subsidiary to the Company or to
another Restricted Subsidiary, (ii) an issuance of Equity Interests by a
Restricted Subsidiary to the Company or to another Restricted Subsidiary, (iii)
a Restricted Payment that is permitted by the covenant contained in Section 4.07
and (iv) a disposition of Cash Equivalents in the ordinary course of business
shall not be deemed to be an Asset Sale.

                  "Attributable Debt" in respect of a sale and leaseback
transaction means, at the time of determination, the present value (discounted
at the rate of interest implicit in such transaction, determined in accordance
with GAAP) of the obligation of the lessee for net rental payments during the
remaining term of the lease included in such sale and leaseback transaction
(including any period for which such lease has been extended or may, at the
option of the lessor, be extended).

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

                  "Board of Directors" means the Board of Directors of the
Company, or any authorized committee of the Board of Directors.

                  "Broker-Dealer" has the meaning set forth in the Registration
Rights Agreement.

                                       3

                  "Business Day" means any day other than a Legal Holiday.

                  "Capital Lease Obligation" means, at the time any
determination thereof is to be made, the amount of the liability in respect of a
capital lease that would at such time be required to be capitalized on a balance
sheet in accordance with GAAP.

                  "Capital Stock" means (i) in the case of a corporation,
corporate stock, (ii) in the case of an association or business entity, any and
all shares, interests, participations, rights or other equivalents (however
designated) of corporate stock, (iii) in the case of a partnership or limited
liability company, partnership or membership interests (whether general or
limited) and (iv) any other interest or participation that confers on a Person
the right to receive a share of the profits and losses of, or distributions of
assets of, the issuing Person.

                  "Cash Equivalents" means (i) United States dollars, (ii)
securities issued or directly and fully guaranteed or insured by the United
States government or any agency or instrumentality thereof having maturities of
not more than one year from the date of acquisition, (iii) certificates of
deposit and eurodollar time deposits with maturities of six months or less from
the date of acquisition, bankers' acceptances with maturities not exceeding six
months and overnight bank deposits, in each case with any domestic financial
institution to the Senior Credit Facilities or with any domestic commercial bank
having capital and surplus in excess of $500.0 million and a Thompson Bank Watch
Rating of "B" or better, (iv) repurchase obligations with a term of not more
than seven days for underlying securities of the types described in clauses (ii)
and (iii) above entered into with any financial institution meeting the
qualifications specified in clause (iii) above, (v) commercial paper having the
highest rating obtainable from Moody's or S&P and in each case maturing within
six months after the date of acquisition, (vi) investment funds investing 95% of
their assets in securities of the types described in clauses (i)-(v) above, and
(vii) readily marketable direct obligations issued by any State of the United
States of America or any political subdivision thereof having maturities of not
more than one year from the date of acquisition and having one of the two
highest rating categories obtainable from either Moody's or S&P.

                  "Change of Control" means the occurrence of any of the
following: (i) the sale, lease, transfer, conveyance or other disposition (other
than by way of merger or consolidation), in one or a series of related
transactions, of all or substantially all of the assets of the Company and its
Restricted Subsidiaries taken as a whole to any "person" (as such term is used
in Section 13(d)(3) of the Exchange Act) other than the Principals or their
Related Parties (as defined below), (ii) the adoption of a plan relating to the
liquidation or dissolution of the Company, (iii) the consummation of any
transaction (including, without limitation, any merger or consolidation) the
result of which is that any "person" (as defined above), other than the
Principals and their Related Parties, becomes the "beneficial owner" (as such
term is defined in Rule 13d-3 and Rule 13d-5 under the Exchange Act), directly
or indirectly, of more than 50% of the Voting Stock of the Company (measured by
voting power rather than number of shares) or (iv) the first day on which a
majority of the members of the Board of Directors of the Company are not
Continuing Directors.

                  "Clearstream" means Clearstream Banking, societe anonyme
(formerly Cedelbank).

                                       4

                  "Consolidated Cash Flow" means, with respect to any Person for
any period, the Consolidated Net Income of such Person for such period plus (i)
an amount equal to any extraordinary loss plus any net loss realized in
connection with an Asset Sale (to the extent such losses were deducted in
computing such Consolidated Net Income), plus (ii) provision for taxes based on
income or profits of such Person and its Restricted Subsidiaries for such
period, to the extent that such provision for taxes was included in computing
such Consolidated Net Income, plus (iii) consolidated interest expense of such
Person and its Restricted Subsidiaries for such period, whether paid or accrued
and whether or not capitalized (including, without limitation, original issue
discount, non-cash interest payments, the interest component of any deferred
payment obligations, the interest component of all payments associated with
Capital Lease Obligations, imputed interest with respect to Attributable Debt,
commissions, discounts and other fees and charges incurred in respect of letter
of credit or bankers' acceptance financings, and net payments (if any) pursuant
to Hedging Obligations), to the extent that any such expense was deducted in
computing such Consolidated Net Income, plus (iv) depreciation, amortization
(including amortization of goodwill, debt issuance costs and other intangibles
but excluding amortization of other prepaid cash expenses that were paid in a
prior period) and other non-cash expenses (excluding any such non-cash expense
to the extent that it represents an accrual of or reserve for cash expenses in
any future period or amortization of a prepaid cash expense that was paid in a
prior period) of such Person and its Restricted Subsidiaries for such period to
the extent that such depreciation, amortization and other non-cash expenses were
deducted in computing such Consolidated Net Income, minus (v) non-cash items
(excluding any items that were accrued in the ordinary course of business)
increasing such Consolidated Net Income for such period, in each case, on a
consolidated basis and determined in accordance with GAAP.

                  "Consolidated Net Income" means, with respect to any Person
for any period, the aggregate of the Net Income of such Person and its
Restricted Subsidiaries for such period, on a consolidated basis, determined in
accordance with GAAP; provided that (i) the Net Income of any Person that is not
a Restricted Subsidiary or that is accounted for by the equity method of
accounting shall be included only to the extent of the amount of dividends or
distributions paid in cash to the referent Person or a Restricted Subsidiary
thereof, (ii) the Net Income of any Restricted Subsidiary shall be excluded to
the extent that the declaration or payment of dividends or similar distributions
by that Restricted Subsidiary of that Net Income is not at the date of
determination permitted without any prior governmental approval (that has not
been obtained) or, directly or indirectly, by operation of the terms of its
charter or any agreement, instrument, judgment, decree, order, statute, rule or
governmental regulation applicable to that Restricted Subsidiary or its
stockholders, (iii) the Net Income of any Person acquired in a pooling of
interests transaction for any period prior to the date of such acquisition shall
be excluded, (iv) the cumulative effect of a change in accounting principles
shall be excluded, (v) the Net Income of any Unrestricted Subsidiary shall be
excluded, whether or not distributed to the Company or one of its Restricted
Subsidiaries, and (vi) the Net Income of any Restricted Subsidiary shall be
calculated after deducting preferred stock dividends payable by such Restricted
Subsidiary to Persons other than the Company and its other Restricted
Subsidiaries.

                  "Consolidated Tangible Assets" means, with respect to the
Company, the total consolidated assets of the Company and its Restricted
Subsidiaries, less the total intangible assets of the Company and its Restricted
Subsidiaries, as shown on the most recent internal

                                       5

consolidated balance sheet of the Company and such Restricted Subsidiaries
calculated on a consolidated basis in accordance with GAAP.

                  "Continuing Directors" means, as of any date of determination,
any member of the Board of Directors of the Company who (i) was a member of such
Board of Directors on the date of this Indenture or (ii) was nominated for
election or elected to such Board of Directors with the approval of a majority
of the Continuing Directors who were members of such Board at the time of such
nomination or election.

                  "Corporate Trust Office of the Trustee" shall be at the
address of the Trustee specified in Section 12.02 hereof or such other address
as to which the Trustee may give notice to the Company.

                  "Credit Facilities" means, with respect to the Company, one or
more debt facilities (including, without limitation, the Senior Credit
Facilities) or commercial paper facilities with banks or other institutional
lenders providing for revolving credit loans, term loans, receivables financing
(including through the sale of receivables to such lenders or to special purpose
entities formed to borrow from such lenders against such receivables) or letters
of credit, in each case, as amended, restated, modified, renewed, refunded,
replaced or refinanced in whole or in part from time to time (and whether or not
with the original lender or lenders and whether provided under the original
Credit Facilities or other credit agreement, indenture or otherwise).

                  "December 1998 Indenture" means the indenture, dated as of
December 11, 1998, among The Bank of New York, as trustee, the Company and the
guarantors party thereto, with respect to the December 1998 Notes.

                  "December 1998 Notes" means the $200,000,000 in aggregate
principal amount of the Company's 8% Senior Subordinated Notes due 2008, issued
pursuant to the December 1998 Indenture on December 11, 1998.

                  "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 a certificated Note registered in the
name of the Holder thereof and issued in accordance with Article 2 hereof,
substantially in the form of Exhibit A hereto, except that such Note shall not
bear the Global Note Legend and shall not have the "Schedule of Exchanges of
Interests in the Global Note" attached thereto.

                  "Depositary" means, with respect to the Notes issuable or
issued in whole or in part in global form, the Person specified in Section 2.03
hereof as the Depositary with respect to the Notes, until a successor shall have
been appointed and become such pursuant to the applicable provision of this
Indenture, and, thereafter, "Depositary" shall mean or include such successor.

                  "Designated Senior Debt" means (i) any Indebtedness
outstanding under the Senior Credit Facilities and (ii) any other Senior Debt
permitted under the Indenture the principal

                                       6

amount of which is $25.0 million or more and that has been designated by the
Company as "Designated Senior Debt".

                  "Disqualified Stock" means any Capital Stock that, by its
terms (or by the terms of any security into which it is convertible, or for
which it is exchangeable, at the option of the holder thereof), or upon the
happening of any event, matures or is mandatorily redeemable, pursuant to a
sinking fund obligation or otherwise, or redeemable at the option of the Holder
thereof, in whole or in part, on or prior to the date that is 91 days after the
date on which the Notes mature; provided, however, that any Capital Stock that
would constitute Disqualified Stock solely because the holders thereof have the
right to require the Company to repurchase such Capital Stock upon the
occurrence of a Change of Control or an Asset Sale shall not constitute
Disqualified Stock if the terms of such Capital Stock provide that the Company
may not repurchase or redeem any such Capital Stock pursuant to such provisions
unless such repurchase or redemption complies with Section 4.07 hereof; and
provided further, that if such Capital Stock is issued to any plan for the
benefit of employees of the Company or its Subsidiaries or by any such plan to
such employees, such Capital Stock shall not constitute Disqualified Stock
solely because it may be required to be repurchased by the Company in order to
satisfy applicable statutory or regulatory obligations.

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

                  "Equity Offering" means any public or private sale of equity
securities (excluding Disqualified Stock) of the Company or Holdings, other than
any private sales to an Affiliate of the Company or Holdings.

                  "Euroclear" means Morgan Guaranty Trust Company of New York,
Brussels office, as operator of the Euroclear system.

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

                  "Exchange Notes" means the Notes issued in the Exchange Offer
pursuant to Section 2.06(f).

                  "Exchange Offer" has the meaning set forth in the Registration
Rights Agreement.

                  "Exchange Offer Registration Statement" has the meaning set
forth in the Registration Rights Agreement.

                  "Existing Indebtedness" means any Indebtedness of the Company
and its Restricted Subsidiaries (other than Indebtedness under the Senior Credit
Facilities and the Notes) in existence on the date of the Indenture, until such
amounts are repaid.

                  "Fixed Charges" means, with respect to any Person for any
period, the sum, without duplication, of (i) the consolidated interest expense
of such Person and its Restricted Subsidiaries for such period, whether paid or
accrued (including, without limitation, original issue discount, non-cash
interest payments, the interest component of any deferred payment

                                       7

obligations, the interest component of all payments associated with Capital
Lease Obligations, imputed interest with respect to Attributable Debt,
commissions, discounts and other fees and charges incurred in respect of letter
of credit or bankers' acceptance financings, and net payments (if any) pursuant
to Hedging Obligations, but excluding amortization of debt issuance costs) and
(ii) the consolidated interest of such Person and its Restricted Subsidiaries
that was capitalized during such period, and (iii) any interest expense on
Indebtedness of another Person that is guaranteed by such Person or one of its
Restricted Subsidiaries or secured by a Lien on assets of such Person or one of
its Restricted Subsidiaries (whether or not such Guarantee or Lien is called
upon) and (iv) the product of (A) all dividend payments, whether or not in cash,
on any series of preferred stock of such Person or any of its Restricted
Subsidiaries, other than dividend payments on Equity Interests payable solely in
Equity Interests of the Company, times (B) a fraction, the numerator of which is
one and the denominator of which is one minus the then current combined federal,
state and local statutory tax rate of such Person, expressed as a decimal, in
each case, on a consolidated basis and in accordance with GAAP.

                  "Fixed Charge Coverage Ratio" means with respect to any Person
for any period, the ratio of the Consolidated Cash Flow of such Person for such
period to the Fixed Charges of such Person and its Restricted Subsidiaries for
such period. In the event that the Company or any of its Restricted Subsidiaries
incurs, assumes, Guarantees or redeems any Indebtedness (other than revolving
credit borrowings) or issues preferred stock subsequent to the commencement of
the period for which the Fixed Charge Coverage Ratio is being calculated but on
or prior to the date on which the event for which the calculation of the Fixed
Charge Coverage Ratio is made (the "Calculation Date"), then the Fixed Charge
Coverage Ratio shall be calculated giving pro forma effect to such incurrence,
assumption, Guarantee or redemption of Indebtedness, or such issuance or
redemption of preferred stock, as if the same had occurred at the beginning of
the applicable four-quarter reference period. In addition, for purposes of
making the computation referred to above, (i) acquisitions that have been made
by the Company or any of its Restricted Subsidiaries, including through mergers
or consolidations and including any related financing transactions, during the
four-quarter reference period or subsequent to such reference period and on or
prior to the Calculation Date shall be deemed to have occurred on the first day
of the four-quarter reference period and Consolidated Cash Flow for such
reference period shall be calculated without giving effect to clause (iii) of
the proviso set forth in the definition of Consolidated Net Income, (ii) the
Consolidated Cash Flow attributable to discontinued operations, as determined in
accordance with GAAP, and operations or businesses disposed of prior to the
Calculation Date, shall be excluded, and (iii) the Fixed Charges attributable to
discontinued operations, as determined in accordance with GAAP, and operations
or businesses disposed of prior to the Calculation Date, shall be excluded, but
only to the extent that the obligations giving rise to such Fixed Charges will
not be obligations of the referent Person or any of its Restricted Subsidiaries
following the Calculation Date.

                  "Foreign Subsidiary" means a Restricted Subsidiary of the
Company that was not organized or existing under the laws of the United States,
any state thereof, the District of Columbia or any territory thereof or that has
not guaranteed or otherwise provided direct credit support for any Indebtedness
of the Company.

                  "GAAP" means generally accepted accounting principles set
forth in the opinions and pronouncements of the Accounting Principles Board of
the American Institute of Certified

                                       8

Public Accountants and statements and pronouncements of the Financial Accounting
Standards Board or in such other statements by such other entity as have been
approved by a significant segment of the accounting profession, which were in
effect on April 30, 1997.

                  "Global Notes" means, individually and collectively, each of
the Restricted Global Notes and the Unrestricted Global Notes, substantially in
the form of Exhibit A hereto issued in accordance with Article 2 hereof.

                  "Global Note Legend" means the legend set forth in Section
2.06(g)(ii) to be placed on all Global Notes issued under this Indenture.

                  "Government Securities" means direct obligations of, or
obligations guaranteed by, the United States of America for the payment of which
guarantee or obligations the full faith and credit of the United States is
pledged.

                  "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 (including, without limitation, letters of
credit and reimbursement agreements in respect thereof), of all or any part of
any Indebtedness.

                  "Guarantors" means each Person listed in the preamble to the
Indenture and each Subsidiary of the Company that executes a Subsidiary
Guarantee in accordance with the provisions of the Indenture, and their
respective successors and assigns.

                  "Hedging Obligations" means, with respect to any Person, the
obligations of such Person under (i) currency exchange or interest rate swap
agreements, interest rate cap agreements and currency exchange or interest rate
collar agreements and (ii) other agreements or arrangements designed to protect
such Person against fluctuations in currency exchange rates or interest rates.

                  "Holder" means a Person in whose name a Note is registered.

                  "Holdings" means L-3 Communications Holdings, Inc., a Delaware
corporation.

                  "IAI Global Note" means the global Note in the form of Exhibit
A hereto bearing the Global Note Legend and the Private Placement Legend and
deposited with and registered in the name of the Depositary or its nominee that
will be issued in a denomination equal to the outstanding principal amount of
the Notes sold to Institutional Accredited Investors.

                  "Indebtedness" means, with respect to any Person, any
indebtedness of such Person, whether or not contingent, in respect of borrowed
money or evidenced by bonds, notes, debentures or similar instruments or letters
of credit (or reimbursement agreements in respect thereof) or banker's
acceptances or representing Capital Lease Obligations or the balance deferred
and unpaid of the purchase price of any property or representing any Hedging
Obligations, except any such balance that constitutes an accrued expense or
trade payable, if and to the extent any of the foregoing indebtedness (other
than letters of credit and Hedging Obligations) would appear as a liability upon
a balance sheet of such Person prepared in accordance with GAAP, as well as all
indebtedness of others secured by a Lien on any asset of

                                       9

such Person (whether or not such indebtedness is assumed by such Person) and, to
the extent not otherwise included, the Guarantee by such Person of any
indebtedness of any other Person. The amount of any Indebtedness outstanding as
of any date shall be (i) the accreted value thereof, in the case of any
Indebtedness that does not require current payments of interest, and (ii) the
principal amount thereof, together with any interest thereon that is more than
30 days past due, in the case of any other Indebtedness.

                  "Indenture" means this Indenture, as amended or supplemented
from time to time.

                  "Indirect Participant" means a Person who holds a beneficial
interest in a Global Note through a Participant.

                  "Initial Notes" means $400.0 million in aggregate principal
amount of Notes issued under this Indenture on the date hereof.

                  "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.

                  "Investments" means, with respect to any Person, all
investments by such Person in other Persons (including Affiliates) in the forms
of direct or indirect loans (including guarantees of Indebtedness or other
obligations), advances or capital contributions (excluding commission, travel,
moving and similar loans or advances to officers and employees made in the
ordinary course of business), purchases or other acquisitions for consideration
of Indebtedness, Equity Interests or other securities, together with all items
that are or would be classified as investments on a balance sheet prepared in
accordance with GAAP. If the Company or any Restricted Subsidiary of the Company
sells or otherwise disposes of any Equity Interests of any direct or indirect
Restricted Subsidiary of the Company such that, after giving effect to any such
sale or disposition, such Person is no longer a Subsidiary of the Company, the
Company shall be deemed to have made an Investment on the date of any such sale
or disposition equal to the fair market value of the Equity Interests of such
Subsidiary not sold or disposed of in an amount determined as provided in the
last paragraph of the covenant contained in Section 4.07.

                  "Legal Holiday" means a Saturday, a Sunday or a day on which
banking institutions in The City of New York 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 at a place of payment, 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.

                  "Lehman Investor" means Lehman Brothers Holdings Inc. and any
of its Affiliates.

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

                  "Lien" means, with respect to any asset, any mortgage, lien,
pledge, charge, security interest or encumbrance of any kind in respect of such
asset, whether or not filed, recorded or otherwise perfected under applicable
law (including any conditional sale or other

                                       10

title retention agreement, any lease in the nature thereof, any option or other
agreement to sell or give a security interest in and any filing of or agreement
to give any financing statement under the Uniform Commercial Code (or equivalent
statutes) of any jurisdiction).

                  "Marketable Securities" means, with respect to any Asset Sale,
any readily marketable equity securities that are (i) traded on The New York
Stock Exchange, the American Stock Exchange or the Nasdaq National Market; and
(ii) issued by a corporation having a total equity market capitalization of not
less than $250.0 million; provided that the excess of (A) the aggregate amount
of securities of any one such corporation held by the Company and any Restricted
Subsidiary over (B) ten times the average daily trading volume of such
securities during the 20 immediately preceding trading days shall be deemed not
to be Marketable Securities; as determined on the date of the contract relating
to such Asset Sale.

                  "May 2003 Indenture" means the indenture, dated as of May 21,
2003, among The Bank of New York, as trustee, the Company and the guarantors
party thereto, with respect to the May 2003 Notes.

                  "May 2003 Notes" means the $400,000,000 in aggregate principal
amount of the Company's 6-1/8% Senior Subordinated Notes due 2013, issued
pursuant to the May 2003 Indenture.

                  "Moody's" means Moody's Investors Services, Inc.

                  "Net Income" means, with respect to any Person, the net income
(loss) of such Person, determined in accordance with GAAP and before any
reduction in respect of preferred stock dividends, excluding, however, (i) any
gain or loss, together with any related provision for taxes thereon, realized in
connection with (A) any Asset Sale (including, without limitation, dispositions
pursuant to sale and leaseback transactions) or (B) the disposition of any
securities by such Person or any of its Restricted Subsidiaries or the
extinguishment of any Indebtedness of such Person or any of its Restricted
Subsidiaries and (ii) any extraordinary gain or loss, together with any related
provision for taxes on such extraordinary gain or loss and (iii) the cumulative
effect of a change in accounting principles.

                  "Net Proceeds" means the aggregate cash proceeds received by
the Company or any of its Subsidiaries in respect of any Asset Sale (including,
without limitation, any cash received upon the sale or other disposition of any
non-cash consideration received in any Asset Sale), net of the direct costs
relating to such Asset Sale (including, without limitation, legal, accounting
and investment banking fees, and sales commissions) and any relocation expenses
incurred as a result thereof, taxes paid or payable as a result thereof (after
taking into account any available tax credits or deductions and any tax sharing
arrangements), amounts required to be applied to the repayment of Indebtedness
secured by a Lien on the asset or assets that were the subject of such Asset
Sale and any reserve for adjustment in respect of the sale price of such asset
or assets established in accordance with GAAP.

                  "Non-Recourse Debt" means Indebtedness (i) as to which neither
the Company nor any of its Restricted Subsidiaries (A) provides credit support
of any kind (including any undertaking, agreement or instrument that would
constitute Indebtedness), (B) is directly or

                                       11

indirectly liable (as a guarantor or otherwise), or (C) constitutes the lender;
and (ii) no default with respect to which (including any rights that the holders
thereof may have to take enforcement action against an Unrestricted Subsidiary)
would permit (upon notice, lapse of time or both) any holder of any other
Indebtedness (other than Indebtedness incurred under Credit Facilities) of the
Company or any of its Restricted Subsidiaries to declare a default on such other
Indebtedness or cause the payment thereof to be accelerated or payable prior to
its stated maturity; and (iii) as to which the lenders have been notified in
writing that they will not have any recourse to the stock or assets of the
Company or any of its Restricted Subsidiaries.

                  "Non-U.S. Person" means a person who is not a U.S. Person.

                  "Note Custodian" means the Trustee, as custodian with respect
to the Notes in global form, or any successor entity thereto.

                  "Notes" has the meaning assigned to it in the preamble to this
Indenture. The Initial Notes and the Additional Notes shall be treated as a
single class for all purposes under this Indenture, and unless the context
otherwise requires, all references to the Notes shall include the Initial Notes
and any Additional Notes.

                  "Obligations" means any principal, premium and Additional
Interest (if any), interest (including interest accruing on or after the filing
of any petition in bankruptcy or for reorganization, whether or not a claim for
post-filing interest is allowed in such proceeding), penalties, fees, charges,
expenses, indemnifications, reimbursement obligations, damages, guarantees and
other liabilities or amounts payable under the documentation governing any
Indebtedness or in respect thereto.

                  "Offering" means the offering of the Notes by the Company.

                  "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.

                  "Officers' Certificate" means a certificate signed on behalf
of the Company by two Officers of the Company, one of whom must be the principal
executive officer, the principal financial officer, the treasurer or the
principal accounting officer of the Company, that meets the requirements of
Section 12.05 hereof.

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

                  "Participant" means, with respect to DTC, Euroclear or
Clearstream, a Person who has an account with DTC, Euroclear or Clearstream,
respectively (and, with respect to DTC, shall include Euroclear and
Clearstream).

                  "Permitted Investment" means (i) any Investment in the Company
or in a Restricted Subsidiary of the Company that is a Guarantor; (ii) any
Investment in cash or Cash

                                       12

Equivalents; (iii) any Investment by the Company or any Restricted Subsidiary of
the Company in a Person, if as a result of such Investment (A) such Person
becomes a Restricted Subsidiary of the Company and a Guarantor or (B) such
Person is merged, consolidated or amalgamated with or into, or transfers or
conveys substantially all of its assets to, or is liquidated into, the Company
or a Restricted Subsidiary of the Company that is a Guarantor; (iv) any
Restricted 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 4.10
or any disposition of assets not constituting an Asset sale; (v) any acquisition
of assets solely in exchange for the issuance of Equity Interests (other than
Disqualified Stock) of the Company; (vi) advances to employees not to exceed
$2.5 million at any one time outstanding; (vii) any Investment acquired in
connection with or as a result of a workout or bankruptcy of a customer or
supplier; (viii) Hedging Obligations permitted to be incurred under Section
4.09; (ix) any Investment in a Similar Business that is not a Restricted
Subsidiary; provided that the aggregate fair market value of all Investments
outstanding pursuant to this clause (ix) (valued on the date each such
Investment was made and without giving effect to subsequent changes in value)
may not at any one time exceed 10% of the Consolidated Tangible Assets of the
Company; and (x) other Investments in any Person having an aggregate fair market
value (measured on the date each such Investment was made and without giving
effect to subsequent changes in value), when taken together with all other
Investments made pursuant to this clause (x) that are at the time outstanding,
not to exceed $30.0 million.

                  "Permitted Joint Venture" means any joint venture, partnership
or other Person designated by the Board of Directors (until designation by the
Board of Directors to the contrary); provided that (i) at least 25% of the
Capital Stock thereof with voting power under ordinary circumstances to elect
directors (or Persons having similar or corresponding powers and
responsibilities) is at the time owned (beneficially or directly) by the Company
and/or by one or more Restricted Subsidiaries of the Company and (ii) such joint
venture, partnership or other Person is engaged in a Similar Business. Any such
designation or designation to the contrary shall be evidenced to the Trustee by
promptly filing with the Trustee a copy of the resolution giving effect to such
designation and an Officers' Certificate certifying that such designation
complied with the foregoing provisions.

                  "Permitted Junior Securities" means Equity Interests in the
Company or debt securities that are subordinated to all Senior Debt (and any
debt securities issued in exchange for Senior Debt) to substantially the same
extent as, or to a greater extent than, the Notes and the Subsidiary Guarantees
are subordinated to Senior Debt pursuant to Article 11 of this Indenture.

                  "Permitted Liens" means (i) Liens securing Senior Debt of the
Company or any Guarantor that was permitted by the terms of this Indenture to be
incurred; (ii) Liens in favor of the Company or any Guarantor; (iii) Liens on
property of a Person existing at the time such Person is merged into or
consolidated with the Company or any Restricted Subsidiary of the Company;
provided that such Liens were in existence prior to the contemplation of such
merger or consolidation and do not extend to any assets other than those of the
Person merged into or consolidated with the Company; (iv) Liens on property
existing at the time of acquisition thereof by the Company or any Subsidiary of
the Company, provided that such Liens were in existence prior to the
contemplation of such acquisition and do not extend to any other assets of the
Company or any of its Restricted Subsidiaries; (v) Liens to secure the
performance of statutory

                                       13

obligations, surety or appeal bonds, performance bonds or other obligations of a
like nature incurred in the ordinary course of business; (vi) Liens to secure
Indebtedness (including Capital Lease Obligations) permitted by clause (iv) of
the second paragraph of Section 4.09 covering only the assets acquired with such
Indebtedness; (vii) Liens existing on the date of this Indenture; (viii) Liens
for taxes, assessments or governmental charges or claims that are not yet
delinquent or that are being contested in good faith by appropriate proceedings
promptly instituted and diligently concluded, provided that any reserve or other
appropriate provision as shall be required in conformity with GAAP shall have
been made therefor; (ix) Liens incurred in the ordinary course of business of
the Company or any Restricted Subsidiary of the Company with respect to
obligations that do not exceed $50.0 million at any one time outstanding; (x)
Liens on assets of Guarantors to secure Senior Debt of such Guarantors that was
permitted by this Indenture to be incurred; (xi) Liens securing Permitted
Refinancing Indebtedness, provided that any such Lien does not extend to or
cover any property, shares or debt other than the property, shares or debt
securing the Indebtedness so refunded, refinanced or extended; (xii) Liens
incurred or deposits made to secure the performance of tenders, bids, leases,
statutory obligations, surety and appeal bonds, government contracts,
performance and return of money bonds and other obligations of a like nature, in
each case incurred in the ordinary course of business (exclusive of obligations
for the payment of borrowed money); (xiii) Liens upon specific items of
inventory or other goods and proceeds of any Person securing such Person's
obligations in respect of bankers' acceptances issued or created for the account
of such Person to facilitate the purchase, shipment or storage of such inventory
or other goods in the ordinary course of business; (xiv) Liens encumbering
customary initial deposits and margin deposits, and other Liens incurred in the
ordinary course of business that are within the general parameters customary in
the industry, in each case securing Indebtedness under Hedging Obligations; and
(xv) Liens encumbering deposits made in the ordinary course of business to
secure nondelinquent obligations arising from statutory or regulatory,
contractual or warranty requirements of the Company or its Subsidiaries for
which a reserve or other appropriate provision, if any, as shall be required by
GAAP shall have been made.

                  "Permitted Refinancing Indebtedness" means any Indebtedness of
the Company or any of its Subsidiaries issued in exchange for, or the net
proceeds of which are used to extend, refinance, renew, replace, defease or
refund other Indebtedness of the Company or any of its Restricted Subsidiaries;
provided that: (i) the principal amount (or accreted value, if applicable) of
such Permitted Refinancing Indebtedness does not exceed the principal amount of
(or accreted value, if applicable), plus accrued interest on, the Indebtedness
so extended, refinanced, renewed, replaced, defeased or refunded (plus the
amount of reasonable expenses and prepayment premiums incurred in connection
therewith); (ii) such Permitted Refinancing Indebtedness has a final maturity
date no earlier than the final maturity date of, and has a Weighted Average Life
to Maturity equal to or greater than the Weighted Average Life to Maturity of,
the Indebtedness being extended, refinanced, renewed, replaced, defeased or
refunded; (iii) if the Indebtedness being extended, refinanced, renewed,
replaced, defeased or refunded is subordinated in right of payment to the Notes,
such Permitted Refinancing Indebtedness is subordinated in right of payment to
the Notes on terms at least as favorable to the Holders of Notes as those
contained in the documentation governing the Indebtedness being extended,
refinanced, renewed, replaced, defeased or refunded; and (iv) such Indebtedness
is incurred either by the Company or by the Restricted Subsidiary who is the
obligor on the Indebtedness being extended, refinanced, renewed, replaced,
defeased or refunded.

                                       14

                  "Permitted Securities" means, with respect to any Asset Sale,
Voting Stock of a Person primarily engaged in one or more Similar Businesses;
provided that after giving effect to the Asset Sale such Person shall become a
Restricted Subsidiary and, unless the Asset Sale relates to a Foreign
Subsidiary, a Guarantor (to the extent required by the terms of this Indenture).

                  "Person" means any individual, corporation, partnership, joint
venture, association, joint-stock company, trust, unincorporated organization or
government or agency or political subdivision thereof (including any subdivision
or ongoing business of any such entity or substantially all of the assets of any
such entity, subdivision or business).

                  "Principals" means any Lehman Investor, Frank C. Lanza and
Robert V. LaPenta.

                  "Private Placement Legend" means the legend set forth in
Section 2.06(g)(i) to be placed on all Notes issued under this Indenture except
as otherwise permitted by the provisions of this Indenture.

                  "Purchase Agreement" means the Purchase Agreement, dated as of
December 16, 2003, among the Company, the Guarantors, Lehman Brothers Inc., Banc
of America Securities LLC, Morgan Stanley & Co. Incorporated, SG Cowen
Securities Corporation and Wachovia Securites, Inc, as representatives of the
several initial purchasers named therein.

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

                  "Registration Rights Agreement" means the A/B Exchange
Registration Rights Agreement, dated as of the date hereof, 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 and, with
respect to any Additional Notes, one or more registration rights agreements
between the Company and the other parties thereto, as such agreement(s) may be
amended, modified or supplemented from time to time, relating to rights given by
the Company to the purchasers of Additional Notes to register such Additional
Notes under the Securities Act.

                  "Regulation S" means Regulation S promulgated under the
Securities Act.

                  "Regulation S Global Note" means a global Note bearing the
Private Placement Legend and deposited with and registered in the name of the
Depositary or its nominee that will be issued in a denomination equal to the
outstanding principal amount of the Notes sold in reliance on Regulation S.

                  "Related Party" with respect to any Principal means (i) any
controlling stockholder, 50% (or more) owned Subsidiary, or spouse or immediate
family member (in the case of an individual) of such Principal or (ii) any
trust, corporation, partnership or other entity, the beneficiaries,
stockholders, partners, owners or Persons beneficially holding a more than 50%
controlling interest of which consist of such Principal and/or such other
Persons referred to in the immediately preceding clause (i).

                  "Representative" means the indenture trustee or other trustee,
agent or representative for any Senior Debt.

                                       15

                  "Responsible Officer" when used with respect to the Trustee,
means any officer within the Corporate Trust Administration of the Trustee (or
any successor group of the Trustee) or any other officer of the Trustee
customarily performing functions similar to those performed by any of the above
designated officers and also means, with respect to a particular corporate trust
matter, any other officer to whom such matter is referred because of his
knowledge of and familiarity with the particular subject.

                  "Restricted Definitive Note" means a Definitive Note bearing
the Private Placement Legend.

                  "Restricted Global Notes" means the 144A Global Note, the IAI
Global Note and the Regulation S Global Note, each of which shall bear the
Private Placement Legend.

                  "Restricted Investment" means an Investment other than a
Permitted Investment.

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

                  "Restricted Subsidiary" means, with respect to any Person,
each Subsidiary of such Person that is not an Unrestricted Subsidiary.

                  "Rule 144" means Rule 144 under the Securities Act.

                  "Rule 144A" means Rule 144A under the Securities Act.

                  "Rule 903" means Rule 903 under the Securities Act.

                  "Rule 904" means Rule 904 under the Securities Act.

                  "SEC" means the Securities and Exchange Commission.

                  "Securities Act" means the Securities Act of 1933, as amended.

                  "Senior Credit Facilities" means the Second Amended and
Restated 364 Day Credit Agreement, dated as of May 16, 2001, as in effect on the
date of this Indenture, among the Company, the lenders party thereto, Bank of
America, N.A., as administrative agent, and Lehman Commercial Paper Inc., as
syndication agent and documentation agent, and the Third Amended and Restated
Credit Agreement, dated as of May 16, 2001, as in effect on the date of this
Indenture among the Company, the lenders party thereto, Bank of America, N.A.,
as administrative agent, and Lehman Commercial Paper Inc., as syndication agent
and documentation agent, and any related notes, collateral documents, letters of
credit and guarantees, including any appendices, exhibits or schedules to any of
the foregoing (as the same may be in effect from time to time), in each case, as
such agreements may be amended, modified, supplemented or restated from time to
time, or refunded, refinanced, restructured, replaced, renewed, repaid or
extended from time to time (whether with the original agents and lenders or
other agents and lenders or otherwise, and whether provided under the original
credit agreement or other credit agreements, indentures or otherwise).

                                       16

                  "Senior Debt" means (i) all Indebtedness of the Company or any
of its Restricted Subsidiaries outstanding under Credit Facilities and all
Hedging Obligations with respect thereto, (ii) any other Indebtedness permitted
to be incurred by the Company or any of its Restricted Subsidiaries under the
terms of the Indenture, unless the instrument under which such Indebtedness is
incurred expressly provides that it is on a parity with or subordinated in right
of payment to the Notes and (iii) all Obligations with respect to the foregoing.
Notwithstanding anything to the contrary in the foregoing, Senior Debt will not
include (i) any liability for federal, state, local or other taxes owed or owing
by the Company, (ii) any Indebtedness of the Company to any of its Subsidiaries
or other Affiliates, (iii) any trade payables or (iv) any Indebtedness that is
incurred in violation of the Indenture. The December 1998 Notes, the 2000
Convertible Notes, the 2001 CODES, the 2002 Notes and the May 2003 Notes shall
be deemed to rank pari pasu with the Notes and shall not constitute Senior Debt.

                  "Shelf Registration Statement" means the Shelf Registration
Statement as defined in the Registration Rights Agreement.

                  "Significant Subsidiary" means any Subsidiary which is a
"significant subsidiary" within the meaning of Rule 405 under the Securities
Act.

                  "Similar Business" means a business, a majority of whose
revenues in the most recently ended calendar year were derived from (i) the sale
of defense products, electronics, communications systems, aerospace products,
avionics products and/or communications products, (ii) any services related
thereto, (iii) any business or activity that is reasonably similar thereto or a
reasonable extension, development or expansion thereof or ancillary thereto, and
(iv) any combination of any of the foregoing.

                  "Stated Maturity" means, with respect to any installment of
interest or principal on any series of Indebtedness, the date on which such
payment of interest or principal was scheduled to be paid in the original
documentation governing such Indebtedness, and shall not include any contingent
obligations to repay, redeem or repurchase any such interest or principal prior
to the date originally scheduled for the payment thereof.

                  "Subsidiary" means, with respect to any Person, (i) any
corporation, association or other business entity of which more than 50% of the
total voting power of shares of Capital Stock entitled (without regard to the
occurrence of any contingency) to vote in the election of directors, managers or
trustees thereof is at the time owned or controlled, directly or indirectly, by
such Person or one or more of the other Subsidiaries of that Person (or a
combination thereof) and (ii) any partnership (A) the sole general partner or
the managing general partner of which is such Person or a Subsidiary of such
Person or (B) the only general partners of which are such Person or of one or
more Subsidiaries of such Person (or any combination thereof).

                  "S&P" means Standard and Poor's Corporation.

                  "TIA" means the Trust Indenture Act of 1939 (15 U.S.C. ss.ss.
77aaa-77bbbb) as in effect on the date on which this Indenture is qualified
under TIA.

                                       17

                  "Transaction Documents" means the Indenture, the Notes, the
Purchase Agreement and the Registration Rights Agreement.

                  "Transfer Restricted Securities" means securities that bear or
are required to bear the Private Placement Legend set forth in Section
2.06(g)(i) hereof.

                  "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 the successor serving hereunder.

                  "Unrestricted Global Note" means one or more Global Notes, in
the form of Exhibit A attached hereto, that do not and are not required to bear
the Private Placement Legend and are deposited with and registered in the name
of the Depositary or its nominee.

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

                  "Unrestricted Subsidiary" means any Subsidiary that is
designated by the Board of Directors as an Unrestricted Subsidiary pursuant to a
resolution of the Board of Directors, but only to the extent that such
Subsidiary: (i) has no Indebtedness other than Non-Recourse Debt; (ii) is not
party to any agreement, contract, arrangement or understanding with the Company
or any Restricted Subsidiary of the Company unless the terms of any such
agreement, contract, arrangement or understanding are no less favorable to the
Company or such Restricted Subsidiary than those that might be obtained at the
time from Persons who are not Affiliates of the Company; (iii) is a Person with
respect to which neither the Company nor any of its Restricted Subsidiaries has
any direct or indirect obligation (A) to subscribe for additional Equity
Interests or (B) to maintain or preserve such Person's financial condition or to
cause such Person to achieve any specified levels of operating results; (iv) has
not guaranteed or otherwise directly or indirectly provided credit support for
any Indebtedness of the Company or any of its Restricted Subsidiaries; and (v)
has at least one director on its board of directors that is not a director or
executive officer of the Company or any of its Restricted Subsidiaries. Any such
designation by the Board of Directors shall be evidenced to the Trustee by
filing with the Trustee a certified copy of a resolution of the Board of
Directors giving effect to such designation and an Officers' Certificate
certifying that such designation complied with the foregoing conditions and was
permitted by Section 4.07. If, at any time, any Unrestricted Subsidiary would
fail to meet the foregoing requirements as an Unrestricted Subsidiary, it shall
thereafter cease to be an Unrestricted Subsidiary for purposes of this Indenture
and any Indebtedness of such Subsidiary shall be deemed to be incurred by a
Restricted Subsidiary of the Company as of such date (and, if such Indebtedness
is not permitted to be incurred as of such date under Section 4.09, the Company
shall be in default of such covenant). The Board of Directors of the Company may
at any time designate any Unrestricted Subsidiary to be a Restricted Subsidiary;
provided that such designation shall be deemed to be an incurrence of
Indebtedness by a Restricted Subsidiary of the Company of any outstanding
Indebtedness of such Unrestricted Subsidiary and such designation shall only be
permitted if (i) such Indebtedness is permitted under Section 4.09, calculated
on a pro forma basis as if such designation had occurred at the beginning of the
four-quarter reference period, and (ii) no Default or Event of Default would be
in existence following such designation.

                                       18

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

                  "Voting Stock" of any Person as of any date means the Capital
Stock of such Person that is at the time entitled to vote in the election of the
Board of Directors of such Person.

                  "Weighted Average Life to Maturity" means, when applied to any
Indebtedness at any date, the number of years obtained by dividing (i) the sum
of the products obtained by multiplying (A) the amount of each then remaining
installment, sinking fund, serial maturity or other required payments of
principal, including payment at final maturity, in respect thereof, by (B) the
number of years (calculated to the nearest one-twelfth) that will elapse between
such date and the making of such payment, by (ii) the then outstanding principal
amount of such Indebtedness.

                  "Wholly Owned" means, when used with respect to any Subsidiary
or Restricted Subsidiary of a Person, a Subsidiary (or Restricted Subsidiary, as
appropriate) of such Person all of the outstanding Capital Stock or other
ownership interests of which (other than directors' qualifying shares) shall at
the time be owned by such Person or by one or more Wholly Owned Subsidiaries (or
Wholly Owned Restricted Subsidiaries, as appropriate) of such Person and one or
more Wholly Owned Subsidiaries (or Wholly Owned Restricted Subsidiaries, as
appropriate) of such Person.

Section 1.02      Other Definitions.

                                                          Defined in
                   Term                                     Section
        "Affiliate Transaction".............................4.11
        "Asset Sale Offer"..................................3.09
        "Change of Control Offer"...........................4.15
        "Change of Control Payment".........................4.15
        "Change of Control Payment Date"....................4.15
        "Covenant Defeasance"...............................8.03
        "DTC"...............................................2.03
        "Event of Default"..................................6.01
        "Excess Proceeds"...................................4.10
        "Global Note Legend"................................2.06
        "incur".............................................4.09
        "Legal Defeasance"..................................8.02
        "Offer Amount"......................................3.09
        "Offer Period"......................................3.09
        "Paying Agent"......................................2.03
        "Payment Blockage Notice" .........................11.03
        "Permitted Debt" ...................................4.09
        "Purchase Date".....................................3.09
        "Registrar".........................................2.03
        "Restricted Payments"...............................4.07

                                       19

        "Series A Notes"................................preamble

Section 1.03      Incorporation by Reference of Trust Indenture Act.

                  Whenever this Indenture refers to a provision of the TIA, the
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:

                  "indenture securities" means the Notes;

                  "indenture security Holder" means a Holder of a Note;

                  "indenture to be qualified" means this Indenture;

                  "indenture trustee" or "institutional trustee" means the
Trustee;

                  "obligor" on the Notes means the Company 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 1.04      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;
         and

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

                                       20

                                    ARTICLE 2
                                    THE NOTES

Section 2.01      Form and Dating.

                  The Notes and the Trustee's certificate of authentication
shall be substantially in the form of Exhibit A hereto. The Notes may be issued
in the form of Definitive Notes or Global Notes, as specified by the Company.
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 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.

                  Notes issued in global form shall be substantially in the form
of Exhibit A attached hereto (including the Global Note Legend and the "Schedule
of Exchanges in the Global Note" attached thereto). Notes issued in definitive
form shall be substantially in the form of Exhibit A attached hereto (but
without the Global Note Legend 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 Note Custodian, at the direction of
the Trustee, in accordance with instructions given by the Holder thereof as
required by Section 2.06 hereof.

                  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" and "Customer Handbook" of
Clearstream shall be applicable to interests in the Regulation S Global Notes
that are held by the Agent Members through Euroclear or Clearstream.

Section 2.02      Execution and Authentication.

                  Two Officers shall sign the Notes for the Company by manual or
facsimile signature.

                  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.

                                       21

                  The Trustee shall, upon a written order of the Company signed
by two Officers, authenticate the Initial Notes for original issue up to $400.0
million in aggregate principal amount and, upon receipt of an authentication
order in accordance with this Section 2.02, at any time and from time to time
thereafter, the Trustee shall authenticate Additional Notes and Exchange Notes
for original issue in an aggregate principal amount specified in such
authentication order.

                  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 2.03      Registrar and Paying Agent.

                  The Company shall maintain an office or agency 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
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 Note Custodian with respect to the
Global Notes.

Section 2.04      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 Additional Interest, 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.

                                       22

Section 2.05      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 ss. 312(a). If the
Trustee is not the Registrar, the Company shall furnish to the Trustee at least
five 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 ss. 312(a).

Section 2.06      Transfer and Exchange.

                  (a) Transfer and Exchange of Global Notes. A Global Note 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 Notes
will be exchanged by the Company for Definitive Notes if (i) the Company
delivers to the Trustee 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 or (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. Upon the occurrence of either of the preceding events in (i) or (ii)
above, 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 2.07 and 2.11 hereof. Every Note
authenticated and made available for delivery in exchange for, or in lieu of, a
Global Note or any portion thereof, pursuant to Section 2.07 or 2.11 hereof,
shall be authenticated and made available for delivery in the form of, and shall
be, a Global Note. A Global Note may not be exchanged for another Note other
than as provided in this Section 2.06(a), however beneficial interests in a
Global Note may be transferred and exchanged as provided in Section 2.06(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 procedures of the Depositary therefor.
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. The Trustee shall have no obligation to
ascertain the Depositary's compliance with any such restrictions on transfer.
Transfers of beneficial interests in the Global Notes 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 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 Restricted
         Period transfers of

                                       23

         beneficial interests in the Regulation S Global Note may not be made to
         a U.S. Person or for the account or benefit of a U.S. Person (other
         than an Initial Purchaser). Beneficial interests in any Unrestricted
         Global Note may be transferred only 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 2.06(b)(i).

                  (ii) All Other Transfers and Exchanges of Beneficial Interests
         in Global Notes. In connection with all transfers and exchanges of
         beneficial interests (other than transfers of beneficial interests in a
         Global Note to Persons who take delivery thereof in the form of a
         beneficial interest in the same Global Note), the transferor of such
         beneficial interest must deliver to the 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
         in the specified 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) 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 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 (1) above. Upon an Exchange Offer by the Company in
         accordance with Section 2.06(f) hereof, the requirements of this
         Section 2.06(b)(ii) 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, the Notes and otherwise applicable under
         the Securities Act, the Trustee shall adjust the principal amount of
         the relevant Global Note(s) pursuant to Section 2.06(h) hereof.

                  (iii) Transfer of Beneficial Interests to Another Restricted
         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 another Restricted Global Note if 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 B
                  hereto, including the certifications in item (1) thereof;

                           (B) if the transferee will take delivery in the form
                  of a beneficial interest in the Regulation S Global Note, then
                  the transferor must deliver a certificate in the form of
                  Exhibit B hereto, including the certifications in item (2)
                  thereof; and

                                       24

                           (C) if the transferee will take delivery in the form
                  of a beneficial interest in the IAI Global Note, then the
                  transferor must deliver (x) a certificate in the form of
                  Exhibit B hereto, including the certifications in item (3)
                  thereof, (y) to the extent required by item 3(d) of Exhibit B
                  hereto, an Opinion of Counsel in form reasonably acceptable to
                  the Company to the effect that such transfer is in compliance
                  with the Securities Act and such beneficial interest is being
                  transferred in compliance with any applicable blue sky
                  securities laws of any State of the United States and (z) if
                  the transfer is being made to an Institutional Accredited
                  Investor and effected pursuant to an exemption from the
                  registration requirements of the Securities Act other than
                  Rule 144A under the Securities Act, Rule 144 under the
                  Securities Act or Rule 904 under the Securities Act, a
                  certificate from the transferee in the form of Exhibit D
                  hereto.

                  (iv) Transfer and Exchange of Beneficial Interests in a
         Restricted Global Note for Beneficial Interests in the Unrestricted
         Global Note. Beneficial interests in any Restricted Global Note may be
         exchanged by any holder thereof for a beneficial interest in the
         Unrestricted Global Note or transferred to Persons who take delivery
         thereof in the form of a beneficial interest in the Unrestricted Global
         Note if:

                           (A) such exchange or transfer is effected pursuant to
                  the Exchange Offer in accordance with the Registration Rights
                  Agreement and the holder, in the case of an exchange, or the
                  transferee, in the case of a transfer, 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
                  Registration Rights Agreement;

                           (C) any such transfer is effected by a Broker-Dealer
                  pursuant to the Exchange Offer Registration Statement in
                  accordance with the Registration Rights Agreement; 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 the Unrestricted Global Note, a
                           certificate from such holder in the form of Exhibit C
                           hereto, including the certifications in item (1)(a)
                           thereof;

                                    (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 the Unrestricted Global Note,
                           a certificate from such holder in the form of Exhibit
                           B hereto, including the certifications in item (4)
                           thereof;

                                    (3) in each such case set forth in this
                           subparagraph (D), an Opinion of Counsel in form
                           reasonably acceptable to the Registrar to the

                                       25

                           effect that such exchange or transfer is in
                           compliance with the Securities Act, that the
                           restrictions on transfer contained herein and in the
                           Private Placement Legend are not required in order to
                           maintain compliance with the Securities Act, and such
                           beneficial interest is being exchanged or transferred
                           in compliance with any applicable blue sky securities
                           laws of any State of the United States.

                  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 2.02 hereof, the Trustee shall authenticate one or more
Unrestricted Global Notes in an aggregate principal amount equal to the
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 any Restricted Global Note.

                  (c) Transfer or Exchange of Beneficial Interests for
Definitive Notes.

                  (i) If any holder of a beneficial interest in a Restricted
         Global Note proposes to exchange such beneficial interest for a
         Definitive Note or to transfer such beneficial interest to a Person who
         takes delivery thereof in the form of a Definitive Note, then, upon
         receipt by the Registrar of the following documentation (all of which
         may be submitted by facsimile):

                           (A) if the holder of such beneficial interest in a
                  Restricted Global Note proposes to exchange such beneficial
                  interest for a Definitive Note, 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 under the Securities
                  Act, a certificate to the effect set forth in Exhibit B
                  hereto, including the certifications in item (1) thereof;

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

                           (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 under the
                  Securities Act, a certificate to the effect set forth in
                  Exhibit B hereto, including the certifications in item (3)(a)
                  thereof;

                           (E) 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) through (D)
                  above, a certificate to the effect set forth in Exhibit B
                  hereto,

                                       26

                  including the certifications in item (3)(d) thereof, a
                  certificate from the transferee to the effect set forth in
                  Exhibit D hereof and, to the extent required by item 3(d) of
                  Exhibit B, an Opinion of Counsel from the transferee or the
                  transferor reasonably acceptable to the Company to the effect
                  that such transfer is in compliance with the Securities Act
                  and such beneficial interest is being transferred in
                  compliance with any applicable blue sky securities laws of any
                  State of the United States;

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

                           (G) if such beneficial interest is being transferred
                  pursuant to an effective registration statement under the
                  Securities Act, a certificate to the effect set forth in
                  Exhibit B hereto, including the certifications in item (3)(c)
                  thereof, the Trustee shall cause the aggregate principal
                  amount of the applicable Global Note to be reduced accordingly
                  pursuant to Section 2.06(h) hereof, and the Company shall
                  execute and the Trustee shall authenticate and deliver to the
                  Person designated in the instructions a Definitive Note in the
                  appropriate principal amount. Definitive Notes issued in
                  exchange for beneficial interests in a Restricted Global Note
                  pursuant to this Section 2.06(c) shall be registered in such
                  names and in such authorized denominations as the holder 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 Notes are so registered. Definitive Notes
                  issued in exchange for a beneficial interest in a Restricted
                  Global Note pursuant to this Section 2.06(c)(i) shall bear the
                  Private Placement Legend and shall be subject to all
                  restrictions on transfer contained therein.

                  (ii) Notwithstanding 2.06(c)(i), 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 Registration Rights
                  Agreement and the holder, in the case of an exchange, or the
                  transferee, in the case of a transfer, 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
                  Registration Rights Agreement;

                           (C) any such transfer is effected by a Broker-Dealer
                  pursuant to the Exchange Offer Registration Statement in
                  accordance with the Registration Rights Agreement; or

                                       27

                           (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 Definitive
                           Note that does not bear the Private Placement Legend,
                           a certificate from such holder in the form of Exhibit
                           C hereto, including the certifications in item (1)(b)
                           thereof;

                                    (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
                           Definitive Note that does not bear the Private
                           Placement Legend, a certificate from such holder in
                           the form of Exhibit B hereto, including the
                           certifications in item (4) thereof; and

                                    (3) in each such case set forth in this
                           subparagraph (D), 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, that the restrictions on transfer
                           contained herein and in the Private Placement Legend
                           are not required in order to maintain compliance with
                           the Securities Act, and such beneficial interest in a
                           Restricted Global Note is being exchanged or
                           transferred in compliance with any applicable blue
                           sky securities laws of any State of the United
                           States.

                  (iii) If any holder of a beneficial interest in an
         Unrestricted Global Note proposes to exchange such beneficial interest
         for a Definitive Note or to transfer such beneficial interest to a
         Person who takes delivery thereof in the form of a Definitive Note,
         then, upon satisfaction of the conditions set forth in Section
         2.06(b)(ii), the Trustee shall cause the aggregate principal amount of
         the applicable Global Note to be reduced accordingly pursuant to
         Section 2.06(h) hereof, and the Company shall execute and the Trustee
         shall authenticate and deliver to the Person designated in the
         instructions a Definitive Note in the appropriate principal amount.
         Definitive Notes issued in exchange for a beneficial interest pursuant
         to this Section 2.06(c)(iii) shall be registered in such names and in
         such authorized denominations as the holder 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 Notes are so registered.
         Definitive Notes issued in exchange for a beneficial interest pursuant
         to this section 2.06(c)(iii) shall not bear the Private Placement
         Legend. Beneficial interests in an Unrestricted Global Note cannot be
         exchanged for a Definitive Note bearing the Private Placement Legend or
         transferred to a Person who takes delivery thereof in the form of a
         Definitive Note bearing the Private Placement Legend.

                  (d) Transfer or Exchange of Definitive Notes for Beneficial
Interests.

                  (i) If any Holder of Restricted Definitive Notes proposes to
         exchange such Notes for a beneficial interest in a Restricted Global
         Note or to transfer such Definitive Notes to a Person who takes
         delivery thereof in the form of a beneficial interest in a

                                       28

         Restricted Global Note, then, upon receipt by the Registrar of the
         following documentation (all of which may be submitted by facsimile):

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

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

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

                           (D) if such Definitive Notes are being transferred
                  pursuant to an exemption from the registration requirements of
                  the Securities Act in accordance with Rule 144 under the
                  Securities Act, a certificate to the effect set forth in
                  Exhibit B hereto, including the certifications in item (3)(a)
                  thereof;

                           (E) if such Definitive Notes are 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) through (D)
                  above, a certificate to the effect set forth in Exhibit B
                  hereto, including the certifications in item (3)(d) thereof, a
                  certificate from the transferee to the effect set forth in
                  Exhibit D hereof and, to the extent required by item 3(d) of
                  Exhibit B, an Opinion of Counsel from the transferee or the
                  transferor reasonably acceptable to the Company to the effect
                  that such transfer is in compliance with the Securities Act
                  and such Definitive Notes are being transferred in compliance
                  with any applicable blue sky securities laws of any State of
                  the United States;

                           (F) if such Definitive Notes are being transferred to
                  the Company or any of its Subsidiaries, a certificate to the
                  effect set forth in Exhibit B hereto, including the
                  certifications in item (3)(b) thereof; or

                           (G) if such Definitive Notes are being transferred
                  pursuant to an effective registration statement under the
                  Securities Act, a certificate to the effect set forth in
                  Exhibit B hereto, including the certifications in item (3)(c)
                  thereof,

         the Trustee shall cancel the Definitive Notes, 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 all other cases, the IAI Global Note.

                                       29

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

                           (A) such exchange or transfer is effected pursuant to
                  the Exchange Offer in accordance with the Registration Rights
                  Agreement and the Holder, in the case of an exchange, or the
                  transferee, in the case of a transfer, 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
                  Registration Rights Agreement;

                           (C) any such transfer is effected by a Broker-Dealer
                  pursuant to the Exchange Offer Registration Statement in
                  accordance with the Registration Rights Agreement; or

                           (D) the Registrar receives the following:

                                    (1) if the Holder of such 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 C
                           hereto, including the certifications in item (1)(c)
                           thereof;

                                    (2) if the Holder of such 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 in the form of Exhibit B
                           hereto, including the certifications in item (4)
                           thereof; and

                                    (3) in each such case set forth in this
                           subparagraph (D), 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, that the restrictions on transfer
                           contained herein and in the Private Placement Legend
                           are not required in order to maintain compliance with
                           the Securities Act, and such Definitive Notes are
                           being exchanged or transferred in compliance with any
                           applicable blue sky securities laws of any State of
                           the United States.

         Upon satisfaction of the conditions of any of the subparagraphs in this
         Section 2.06(d)(ii), the Trustee shall cancel the Definitive Notes and
         increase or cause to be increased the aggregate principal amount of the
         Unrestricted Global Note.

                  (iii) A Holder of Unrestricted Definitive Notes may exchange
         such Notes for a beneficial interest in the Unrestricted Global Note or
         transfer such Definitive Notes to a Person who takes delivery thereof
         in the form of a beneficial interest in the Unrestricted Global Note.
         Upon receipt of a request for such an exchange or transfer, the Trustee
         shall

                                       30

         cancel the Unrestricted Definitive Notes and increase or cause to be
         increased the aggregate principal amount of the Unrestricted Global
         Note.

                  If any such exchange or transfer from a Definitive Note to a
beneficial interest is effected pursuant to subparagraphs (ii)(B), (ii)(D) or
(iii) 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 2.02 hereof, the Trustee shall authenticate one or more
Unrestricted Global Notes in an aggregate principal amount equal to the
principal amount of beneficial interests transferred pursuant to subparagraphs
(ii)(B), (ii)(D) or (iii) above.

                  (e) Transfer and Exchange of Definitive Notes. Upon request by
a Holder of Definitive Notes and such Holder's compliance with the provisions of
this Section 2.06(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 his attorney,
duly authorized in writing. In addition, the requesting Holder shall provide any
additional certifications, documents and information, as applicable, pursuant to
the provisions of this Section 2.06(e).

                  (i) Restricted Definitive Notes may be transferred to and
         registered in the name of Persons who take delivery thereof if the
         Registrar receives the following:

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

                           (B) if the transfer will be made pursuant to Rule
                  904, then the transferor must deliver a certificate in the
                  form of Exhibit B hereto, including the certifications in item
                  (2) thereof; and

                           (C) if the transfer will be made pursuant to any
                  other exemption from the registration requirements of the
                  Securities Act, then the transferor must deliver (x) a
                  certificate in the form of Exhibit B hereto, including the
                  certifications in item (3) thereof, (y) to the extent required
                  by item 3(d) of Exhibit B hereto, an Opinion of Counsel in
                  form reasonably acceptable to the Company to the effect that
                  such transfer is in compliance with the Securities Act and
                  such beneficial interest is being transferred in compliance
                  with any applicable blue sky securities laws of any State of
                  the United States and (z) if the transfer is being made to an
                  Institutional Accredited Investor and effected pursuant to an
                  exemption from the registration requirements of the Securities
                  Act other than Rule 144A under the Securities Act, Rule 144
                  under the Securities Act or Rule 904 under the Securities Act,
                  a certificate from the transferee in the form of Exhibit D
                  hereto.

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

                                       31

                           (A) such exchange or transfer is effected pursuant to
                  the Exchange Offer in accordance with the Registration Rights
                  Agreement and the holder, in the case of an exchange, or the
                  transferee, in the case of a transfer, 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
                  Registration Rights Agreement;

                           (C) any such transfer is effected by a Broker-Dealer
                  pursuant to the Exchange Offer Registration Statement in
                  accordance with the Registration Rights Agreement; 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 C hereto,
                           including the certifications in item (1)(a) thereof;

                                    (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 B hereto,
                           including the certifications in item (4) thereof; and

                                    (3) in each such case set forth in this
                           subparagraph (D), 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, that the restrictions on transfer
                           contained herein and in the Private Placement Legend
                           are not required in order to maintain compliance with
                           the Securities Act, and such Restricted Definitive
                           Note is being exchanged or transferred in compliance
                           with any applicable blue sky securities laws of any
                           State of the United States.

                  (iii) 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 for such a
         transfer, the Registrar shall register the Unrestricted Definitive
         Notes pursuant to the instructions from the Holder thereof.
         Unrestricted Definitive Notes cannot be exchanged for or transferred to
         Persons who take delivery thereof in the form of a Restricted
         Definitive Note.

                  (f) Exchange Offer. Upon the occurrence of the Exchange Offer
in accordance with the Registration Rights Agreement, the Company shall issue
and, upon receipt of an authentication order in accordance with Section 2.02,
the Trustee shall authenticate (i) one or more Unrestricted Global Notes in an
aggregate principal amount equal to the principal amount of the beneficial
interests in the Restricted Global Notes tendered for acceptance by persons that
are not (x) broker-dealers, (y) Persons participating in the distribution of the

                                       32

Exchange Notes or (z) Persons who are affiliates (as defined in Rule 144) of the
Company and accepted for exchange in the exchange Offer and (ii) Definitive
Notes in an aggregate principal amount equal to the principal amount of the
Restricted Definitive Notes accepted for exchange in the Exchange Offer.
Concurrent with the issuance of such Notes, the Trustee shall cause the
aggregate principal amount of the applicable Restricted Global Notes to be
reduced accordingly, and the Company shall execute and the Trustee shall
authenticate and make available for delivery to the Persons designated by the
Holders of Definitive Notes so accepted Definitive Notes in the appropriate
principal amount.

                  (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.

                  (i) 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:

         "THE SECURITY (OR ITS PREDECESSOR) EVIDENCED HEREBY WAS ORIGINALLY
         ISSUED IN A TRANSACTION EXEMPT FROM REGISTRATION UNDER SECTION 5 OF THE
         UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
         ACT"), AND THE SECURITY EVIDENCED HEREBY MAY NOT BE OFFERED, SOLD OR
         OTHERWISE TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN
         APPLICABLE EXEMPTION THEREFROM. EACH PURCHASER OF THE SECURITY
         EVIDENCED HEREBY IS HEREBY NOTIFIED THAT THE SELLER MAY BE RELYING ON
         THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF THE SECURITIES ACT
         PROVIDED BY RULE 144A THEREUNDER. THE HOLDER OF THE SECURITY EVIDENCED
         HEREBY AGREES FOR THE BENEFIT OF L-3 COMMUNICATIONS CORPORATION THAT
         (A) SUCH SECURITY MAY BE RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY
         (1)(a) TO A PERSON WHO THE SELLER REASONABLY BELIEVES IS A QUALIFIED
         INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT)
         IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (b) IN A
         TRANSACTION MEETING THE REQUIREMENTS OF RULE 144 UNDER THE SECURITIES
         ACT, (c) OUTSIDE THE UNITED STATES TO A FOREIGN PERSON IN A TRANSACTION
         MEETING THE REQUIREMENTS OF RULE 904 UNDER THE SECURITIES ACT OR (d) IN
         ACCORDANCE WITH ANOTHER EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF
         THE SECURITIES ACT (AND BASED UPON AN OPINION OF COUNSEL IF L-3
         COMMUNICATIONS CORPORATION SO REQUESTS), (2) TO L-3 COMMUNICATIONS
         CORPORATION OR (3) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT AND,
         IN EACH CASE, IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY
         STATE OF THE UNITED STATES OR ANY OTHER APPLICABLE JURISDICTION AND (B)
         THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY
         PURCHASER FROM IT

                                       33

         OF THE SECURITY EVIDENCED HEREBY OF THE RESALE RESTRICTIONS SET FORTH
         IN (A) ABOVE."

                           (B) Notwithstanding the foregoing, any Global Note or
                  Definitive Note issued pursuant to subparagraphs (b)(iv),
                  (c)(ii), (c)(iii), (d)(ii), (d)(iii), (e)(ii), (e)(iii) or (f)
                  to this Section 2.06 (and all Notes issued in exchange
                  therefor or substitution thereof) shall not bear the Private
                  Placement Legend.

                  (ii) Global Note Legend. Each Global Note shall bear a legend
         in substantially the following form:

         "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 2.07 OF
         THE INDENTURE, (II) THIS GLOBAL NOTE MAY BE EXCHANGED IN WHOLE BUT NOT
         IN PART PURSUANT TO SECTION 2.06(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."

                  (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 canceled in whole and not in part, each such Global Note shall be returned to
or retained and canceled 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 shall 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 shall 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 the Company's order or at the Registrar's
         request.

                  (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

                                       34

         exchange, but the Company may require payment of a sum sufficient to
         cover any transfer tax 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, 3.06, 4.10, 4.15 and 9.05 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 debt, 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 Notes during a period beginning
         at the opening of business 15 days before the day of any selection of
         Notes for redemption under Section 3.02 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 a 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) The Trustee shall authenticate Global Notes and
         Definitive Notes in accordance with the provisions of Section 2.02
         hereof.

Section 2.07      Replacement Notes.

                  If any mutilated Note is surrendered to the Trustee, or the
Company and the Trustee receives evidence to its satisfaction of the
destruction, loss or theft of any Note, the Company shall issue and the Trustee,
upon the written order of the Company signed by two Officers of the Company,
shall authenticate a replacement Note if the Trustee'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 authenticating 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.

                                       35

Section 2.08      Outstanding Notes.

                  The Notes outstanding at any time are all the Notes
authenticated by the Trustee except for those canceled by it, 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 as not outstanding. Except as set forth in Section 2.09 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 2.07 hereof, it
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 4.01 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 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 2.09      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 a Trustee knows are so owned shall
be so disregarded.

Section 2.10      Temporary Notes.

                  Until Definitive Notes are ready for delivery, the Company may
prepare and the Trustee shall authenticate temporary Notes upon a written order
of the Company signed by two Officers of the Company. 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.

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 and no one else shall cancel all Notes surrendered for registration of
transfer, exchange, payment, replacement or cancellation and shall

                                       36

destroy canceled Notes (subject to the record retention requirement of the
Exchange Act). Certification of the destruction of all canceled 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.

                  If the Company defaults in a payment of interest on the Notes,
it shall pay the defaulted interest in any lawful manner plus, to the extent
lawful, interest payable on the defaulted interest, to the Persons who are
Holders on a subsequent special record date, in each case at the rate provided
in the Notes and in Section 4.01 hereof. The Company shall notify the Trustee in
writing of the amount of defaulted interest proposed to be paid on each Note and
the date of the proposed payment. The Company shall fix or cause to be fixed
each such special record date and payment date, provided that no such special
record date shall be less than 10 days prior to the related payment date for
such defaulted interest. At least 15 days before the special record date, the
Company (or, upon the written request of the Company, the Trustee in the name
and at the expense of the Company) shall mail or cause to be mailed to Holders a
notice that states the special record date, the related payment date and the
amount of such interest to be paid.

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 3.
                            REDEMPTION AND PREPAYMENT

Section 3.01      Notices to Trustee.

                  If the Company elects to redeem Notes pursuant to the optional
redemption provisions of Section 3.07 hereof, it shall furnish to the Trustee,
at least 30 days but not more than 60 days 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 3.02      Selection of Notes to Be Redeemed.

                  If less than all of the Notes are to be redeemed at any time,
selection of Notes for redemption shall be made by the Trustee 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 by such method as the Trustee shall deem fair and appropriate;
provided that no Notes of $1,000 or less shall be redeemed in part. Notices of

                                       37

redemption shall be mailed by first class mail at least 30 but not more than 60
days before the redemption date to each Holder of Notes to be redeemed at its
registered address. Notices of redemption may not be conditional. If any Note is
to be redeemed in part only, the notice of redemption that relates to such Note
shall state the portion of the principal amount thereof to be redeemed. A new
Note in principal amount equal to the unredeemed portion thereof shall be issued
in the name of the Holder thereof upon cancellation of the original Note. Notes
called for redemption become due on the date fixed for redemption. On and after
the redemption date, interest ceases to accrue on Notes or portions of them
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 selected shall be in amounts of $1,000 or whole 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 a multiple
of $1,000, shall be redeemed. Except as 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 3.03      Notice Of Redemption.

                  Subject to the provisions of Section 3.09 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 (including
CUSIP Numbers, if any) 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, 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

                                       38

                  (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, 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.

Section 3.04      Effect Of Notice Of Redemption.

                  Once notice of redemption is mailed in accordance with Section
3.03 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 3.05      Deposit Of Redemption Price.

                  Prior to 11:00 a.m. on the Business Day prior to the
redemption date, the Company shall deposit with the Trustee or with the Paying
Agent money sufficient to pay the redemption price of and accrued interest 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 interest 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 shall be paid to the Person
in whose name such Note was registered at the close of business on such 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 4.01 hereof.

Section 3.06      Notes Redeemed In Part.

                  Upon surrender of a Note that is redeemed in part, the Company
shall issue and, upon the Company's written request, 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 3.07      Optional Redemption.

(a) Except as set forth in clause (b) of this Section 3.7, the Notes shall not
be redeemable at the Company's option prior to January 15, 2009. Thereafter, the
Notes shall be subject to redemption at any time at the option of the Company,
in whole or in part, upon not less than 30 nor more than 60 days' notice, at the
redemption prices (expressed as percentages of

                                       39

principal amount) set forth below plus accrued and unpaid interest and
Additional Interest thereon, if any, to the applicable redemption date, if
redeemed during the twelve-month period beginning on January 15 of the years
indicated below:

                  Year                                              Percentage
                  2009..........................................     103.063%
                  2010..........................................     102.042%
                  2011..........................................     101.021%
                  2012 and thereafter...........................     100.000%

                  (b) Notwithstanding the foregoing clause (a), before January
15, 2007, the Company may on any one or more occasions redeem up to an aggregate
of 35% of the Notes originally issued at a redemption price of 106.125% of the
principal amount thereof, plus accrued and unpaid interest and Additional
Interest thereon, if any, to the redemption date, with the net cash proceeds of
one or more Equity Offerings by the Company or the net cash proceeds of one or
more Equity Offerings by Holdings that are contributed to the Company as common
equity capital; provided that at least 65% of the Notes originally issued remain
outstanding immediately after the occurrence of each such redemption; and
provided, further, that any such redemption must occur within 120 days of the
date of the closing of such Equity Offering.

Section 3.08      Mandatory Redemption.

                  Except as set forth under Sections 4.10 and 4.15, the Company
is not required to make mandatory redemption or sinking fund payments with
respect to the Notes.

Section 3.09      Offer To Purchase By Application Of Excess Proceeds.

                  In the event that, pursuant to Section 4.10 hereof, the
Company shall be required to commence an offer to all Holders to purchase Notes
(an "Asset Sale Offer"), it shall follow the procedures specified below.

                  The Asset Sale Offer shall remain open for a period of 20
Business Days following its commencement and no longer, except to the extent
that a longer period is required by applicable law (the "Offer Period"). No
later than five Business Days after the termination of the Offer Period (the
"Purchase Date"), the Company shall purchase the principal amount of Notes
required to be purchased pursuant to Section 4.10 hereof (the "Offer Amount")
or, if less than the Offer Amount has been tendered, all Notes tendered in
response to the Asset Sale Offer. Payment for any Notes so purchased shall be
made in the same manner as interest payments are made.

                  If the Purchase Date is on or after an interest record date
and on or before the related interest payment date, any accrued and unpaid
interest shall be paid to the Person in whose name a Note is registered at the
close of business on such record date, and no additional interest shall be
payable to Holders who tender Notes pursuant to the Asset Sale Offer.

                  Upon the commencement of an Asset Sale Offer, the Company
shall send, by first class mail, a notice to the Trustee and each of the
Holders, with a copy to the Trustee. The notice

                                       40

shall contain all instructions and materials necessary to enable such Holders to
tender Notes pursuant to the Asset Sale Offer. The Asset Sale Offer shall be
made to all Holders. The notice, which shall govern the terms of the Asset Sale
Offer, shall state:

                  (a) that the Asset Sale Offer is being made pursuant to this
         Section 3.09 and Section 4.10 hereof and the length of time the Asset
         Sale Offer shall remain open;

                  (b) the Offer Amount, the purchase price and the Purchase
         Date;

                  (c) that any Note not tendered or accepted for payment shall
         continue to accrete or accrue interest;

                  (d) that, unless the Company defaults in making such payment,
         any Note accepted for payment pursuant to the Asset Sale Offer shall
         cease to accrete or accrue interest after the Purchase Date;

                  (e) that Holders electing to have a Note purchased pursuant to
         an Asset Sale Offer may only elect to have all of such Note purchased
         and may not elect to have only a portion of such Note purchased;

                  (f) that Holders electing to have a Note purchased pursuant to
         any Asset Sale Offer shall be required to surrender the Note, with the
         form entitled "Option of Holder to Elect Purchase" on the reverse of
         the Note completed, or transfer by book-entry transfer, to the Company,
         a depositary, if appointed by the Company, or a Paying Agent at the
         address specified in the notice at least three days before the Purchase
         Date;

                  (g) that Holders shall be entitled to withdraw their election
         if the Company, the Depositary or the Paying Agent, as the case may be,
         receives, not later than the expiration of the Offer Period, a
         facsimile transmission or letter setting forth the name of the Holder,
         the principal amount of the Note the Holder delivered for purchase and
         a statement that such Holder is withdrawing his election to have such
         Note purchased;

                  (h) that, if the aggregate principal amount of Notes
         surrendered by Holders exceeds the Offer Amount, the Company shall
         select the Notes to be purchased on a pro rata basis (with such
         adjustments as may be deemed appropriate by the Company so that only
         Notes in denominations of $1,000, or integral multiples thereof, shall
         be purchased); and

                  (i) that Holders whose Notes were purchased only in part shall
         be issued new Notes equal in principal amount to the unpurchased
         portion of the Notes surrendered (or transferred by book-entry
         transfer).

                  On or before the Purchase Date, the Company shall, to the
extent lawful, accept for payment, on a pro rata basis to the extent necessary,
the Offer Amount of Notes or portions thereof tendered pursuant to the Asset
Sale Offer, or if less than the Offer Amount has been tendered, all Notes
tendered, and shall deliver to the Trustee an Officers' Certificate stating that
such Notes or portions thereof were accepted for payment by the Company in
accordance with the terms of this Section 3.09. The Company, the Depositary or
the Paying Agent, as the case

                                       41

may be, shall promptly (but in any case not later than five days after the
Purchase Date) mail or deliver to each tendering Holder an amount equal to the
purchase price of the Notes tendered by such Holder and accepted by the Company
for purchase, and the Company shall promptly issue a new Note, and the Trustee,
upon written request from the Company shall authenticate and mail or deliver
such new Note to such Holder, in a principal amount equal to any unpurchased
portion of the Note surrendered. Any Note not so accepted shall be promptly
mailed or delivered by the Company to the Holder thereof. The Company shall
publicly announce the results of the Asset Sale Offer on the Purchase Date.

                  Other than as specifically provided in this Section 3.09, any
purchase pursuant to this Section 3.09 shall be made pursuant to the provisions
of Sections 3.01 through 3.06 hereof.

                                   ARTICLE 4.
                                   COVENANTS

Section 4.01      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 shall be
considered paid on the date due if the Paying Agent, if other than the Company
or a Subsidiary thereof, holds as of 10:00 a.m. 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 then due. The
Company shall pay all Additional Interest, if any, in the same manner on the
dates and in the amounts set forth in the Registration Rights Agreement.

                  The Company shall pay interest (including post-petition
interest in any proceeding under any Bankruptcy Law) on overdue principal at the
rate equal to 1.0% per annum in excess of the then applicable interest rate on
the Notes to the extent lawful; it shall pay interest (including post-petition
interest in any proceeding under any Bankruptcy Law) on overdue installments of
interest and Additional Interest (without regard to any applicable grace period)
at the same rate to the extent lawful.

Section 4.02      Maintenance Of Office Or Agency.

                  The Company 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 in respect of the Notes and this Indenture may be
served. The Company 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 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 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 designations;
provided, however, that no such designation or

                                       42

rescission shall in any manner relieve the Company of its obligation to maintain
an office or agency in the Borough of Manhattan, The City of New York for such
purposes. The Company 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 2.03.

Section 4.03      Reports.

                  Notwithstanding that the Company may not be subject to the
reporting requirements of Section 13 or 15(d) of the Exchange Act or otherwise
report on an annual and quarterly basis on forms provided for such annual and
quarterly reporting pursuant to rules and regulations promulgated by the SEC,
the Company shall file with the SEC (and provide the Trustee and Holders with
copies thereof), without cost to each Holder, within 15 days after it files them
with the SEC:

                  (a) within 90 days after the end of each fiscal year, annual
         reports on Form 10-K (or any successor or comparable form) containing
         the information required to be contained therein (or required in such
         successor or comparable form);

                  (b) within 45 days after the end of each of the first three
         fiscal quarters of each fiscal year, reports on Form 10-Q (or any
         successor or comparable form);

                  (c) promptly from time to time after the occurrence of an
         event required to be therein reported, such other reports on Form 8-K
         (or any successor or comparable form); and

                  (d) any other information, documents and other reports which
         the Company would be required to file with the SEC if it were subject
         to Section 13 or 15(d) of the Exchange Act; provided, however, the
         Company shall not be so obligated to file such reports with the SEC if
         the SEC does not permit such filing, in which event the Company will
         make available such information to prospective purchasers of Notes, in
         addition to providing such information to the Trustee and the Holders,
         in each case within 15 days after the time the Company would be
         required to file such information with the SEC, if it were subject to
         Sections 13 or 15(d) of the Exchange Act.

                  Subject to the provisions of Article 7, delivery of such
reports, information and documents to the Trustee is for informational purposes
only and the Trustee's receipt of such shall not constitute constructive notice
of any information contained therein or determinable from information contained
therein, including the Company's compliance with any of its covenants hereunder
(as to which the Trustee is entitled to rely exclusively on Officers'
Certificates).

Section 4.04      Compliance Certificate.

                  (a) The Company shall deliver to the Trustee, within 90 days
after the end of each fiscal year, an Officers' Certificate stating that a
review of the activities of the Company

                                       43

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 has kept, observed, performed and fulfilled its obligations under this
Indenture, and further stating, as to each such Officer signing such
certificate, that to the best of his or her knowledge the Company has kept,
observed, performed and fulfilled each and every covenant contained in this
Indenture and is 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, 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 the best of 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.

                  (b) So long as not contrary to the then current
recommendations of the American Institute of Certified Public Accountants, the
year-end financial statements delivered pursuant to Section 4.03(a) above shall
be accompanied by a written statement of the Company's independent public
accountants (who shall be a firm of established national reputation) that in
making the examination necessary for certification of such financial statements,
nothing has come to their attention that would lead them to believe that the
Company has violated any provisions of Article 4 or Article 5 hereof or, if any
such violation has occurred, specifying the nature and period of existence
thereof, it being understood that such accountants shall not be liable directly
or indirectly to any Person for any failure to obtain knowledge of any such
violation.

                  (c) The Company shall, so long as any of the Notes are
outstanding, deliver to the Trustee, as soon as possible and in any event within
five Business Days after 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 4.05      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 is not
adverse in any material respect to the Holders of the Notes.

Section 4.06       Stay, Extension and Usury Laws

                  The Company and each of the Guarantors covenants (to the
extent that it may lawfully do so) that it will 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, to the extent that it may lawfully do so, the Company and each of the
Guarantors hereby expressly waives all benefit or advantage of any such law, and
covenants that it will not, by resort to any such law, hinder, delay or impede
the execution of any power herein granted to the

                                       44

Trustee, but will suffer and permit the execution of every such power as though
no such law has been enacted.

Section 4.07      Restricted Payments.

                  The Company shall not, and shall not permit any of its
Restricted Subsidiaries to, directly or indirectly: (i) declare or pay any
dividend or make any other payment or distribution on account of the Company's
or any of its Restricted Subsidiaries' Equity Interests (including, without
limitation, any payment in connection with any merger or consolidation involving
the Company) or to the direct or indirect holders of the Company's or any of its
Restricted Subsidiaries' Equity Interests in their capacity as such (other than
(A) dividends or distributions payable in Equity Interests (other than
Disqualified Stock) of the Company or (B) dividends or distributions by a
Restricted Subsidiary so long as, in the case of any dividend or distribution
payable on or in respect of any class or series of securities issued by a
Restricted Subsidiary other than a Wholly Owned Restricted Subsidiary, the
Company or a Restricted Subsidiary receives at least its pro rata share of such
dividend or distribution in accordance with its Equity Interests in such class
or series of securities); (ii) purchase, redeem or otherwise acquire or retire
for value (including without limitation, in connection with any merger or
consolidation involving the Company) any Equity Interests of the Company or any
direct or indirect parent of the Company; (iii) make any payment on or with
respect to, or purchase, redeem, defease or otherwise acquire or retire for
value any Indebtedness that is subordinated to the Notes except a payment of
interest or principal at Stated Maturity; or (iv) make any Restricted Investment
(all such payments and other actions set forth in clauses (i) through (iv) above
being collectively referred to as "Restricted Payments"), unless, at the time of
and after giving effect to such Restricted Payment:

                  (a) no Default or Event of Default shall have occurred and be
         continuing or would occur as a consequence thereof; and

                  (b) the Company would, at the time of such Restricted Payment
         and after giving pro forma effect thereto as if such Restricted Payment
         had been made at the beginning of the applicable four-quarter period,
         have been permitted to incur at least $1.00 of additional Indebtedness
         pursuant to the Fixed Charge Coverage Ratio test set forth in the first
         paragraph of Section 4.09; and

                  (c) such Restricted Payment, together with the aggregate
         amount of all other Restricted Payments made by the Company and its
         Restricted Subsidiaries since April 30, 1997 (excluding Restricted
         Payments permitted by clauses (ii) through (viii) of the next
         succeeding paragraph or of the kind contemplated by such clauses that
         were made prior to the date of this Indenture), is less than the sum of
         (i) 50% of the Consolidated Net Income of the Company for the period
         (taken as one accounting period) from July 1, 1997 to the end of the
         Company's most recently ended fiscal quarter for which internal
         financial statements are available at the time of such Restricted
         Payment (or, if such Consolidated Net Income for such period is a
         deficit, less 100% of such deficit), plus (ii) 100% of the aggregate
         net cash proceeds received by the Company since April 30, 1997 as a
         contribution to its common equity capital or from the issue or sale of
         Equity Interests of the Company (other than Disqualified Stock) or from
         the issue or sale of

                                       45

         Disqualified Stock or debt securities of the Company that have been
         converted into such Equity Interests (other than Equity Interests (or
         Disqualified Stock or convertible debt securities) sold to a Subsidiary
         of the Company and other than Disqualified Stock or convertible debt
         securities that have been converted into Disqualified Stock), plus
         (iii) to the extent that any Restricted Investment that was made after
         April 30, 1997 is sold for cash or otherwise liquidated or repaid for
         cash, the amount of cash received in connection therewith (or from the
         sale of Marketable Securities received in connection therewith), plus
         (iv) to the extent not already included in such Consolidated Net Income
         of the Company for such period and without duplication, (A) 100% of the
         aggregate amount of cash received as a dividend from an Unrestricted
         Subsidiary, (B) 100% of the cash received upon the sale of Marketable
         Securities received as a dividend from an Unrestricted Subsidiary, and
         (C) 100% of the net assets of any Unrestricted Subsidiary on the date
         that it becomes a Restricted Subsidiary.

                  The foregoing provisions shall not prohibit: (i) the payment
of any dividend within 60 days after the date of declaration thereof, if at said
date of declaration such payment would have complied with the provisions of this
Indenture; (ii) the redemption, repurchase, retirement, defeasance or other
acquisition of any subordinated Indebtedness or Equity Interests of the Company
in exchange for, or out of the net cash proceeds of the substantially concurrent
sale (other than to a Subsidiary of the Company) of, other Equity Interests of
the Company (other than any Disqualified Stock); provided that the amount of any
such net cash proceeds that are utilized for any such redemption, repurchase,
retirement, defeasance or other acquisition shall be excluded from clause
(c)(ii) of the preceding paragraph; (iii) the defeasance, redemption, repurchase
or other acquisition of subordinated Indebtedness (other than intercompany
Indebtedness) in exchange for, or with the net cash proceeds from an incurrence
of, Permitted Refinancing Indebtedness; (iv) the repurchase, retirement or other
acquisition or retirement for value of common Equity Interests of the Company or
Holdings held by any future, present or former employee, director or consultant
of the Company or any Subsidiary or Holdings issued pursuant to any management
equity plan or stock option plan or any other management or employee benefit
plan or agreement; provided, however, that the aggregate amount of Restricted
Payments made under this clause (iv) does not exceed $1.5 million in any
calendar year and provided further that cancellation of Indebtedness owing to
the Company from members of management of the Company or any of its Restricted
Subsidiaries in connection with a repurchase of Equity Interests of the Company
shall not be deemed to constitute a Restricted Payment for purposes of this
covenant or any other provision of this Indenture; (v) repurchases of Equity
Interests deemed to occur upon exercise of stock options upon surrender of
Equity Interests to pay the exercise price of such options; (vi) payments to
Holdings (A) in amounts equal to the amounts required for Holdings to pay
franchise taxes and other fees required to maintain its legal existence and
provide for other operating costs of up to $500,000 per fiscal year and (B) in
amounts equal to amounts required for Holdings to pay federal, state and local
income taxes to the extent such income taxes are actually due and owing;
provided that the aggregate amount paid under this clause (B) does not exceed
the amount that the Company would be required to pay in respect of the income of
the Company and its Subsidiaries if the Company were a stand alone entity that
was not owned by Holdings; (vii) dividends paid to Holdings in amounts equal to
amounts required for Holdings to pay interest and/or principal on Indebtedness
that has been guaranteed by, or is otherwise considered Indebtedness of, the

                                       46

Company; and (viii) other Restricted Payments in an aggregate amount since May
22, 1998 not to exceed $20.0 million.

                  The Board of Directors of the Company may designate any
Restricted Subsidiary to be an Unrestricted Subsidiary if such designation would
not cause a Default. For purposes of making such determination, all outstanding
Investments by the Company and its Restricted Subsidiaries (except to the extent
repaid in cash) in the Subsidiary so designated shall be deemed to be Restricted
Payments at the time of such designation and shall reduce the amount available
for Restricted Payments under the first paragraph of this covenant. All such
outstanding Investments shall be deemed to constitute Investments in an amount
equal to the fair market value of such Investments at the time of such
designation. Such designation shall only be permitted if such Restricted Payment
would be permitted at such time and if such Restricted Subsidiary otherwise
meets the definition of an Unrestricted Subsidiary.

                  The amount of all Restricted Payments (other than cash) shall
be the fair market value on the date of the Restricted Payment of the asset(s)
or securities proposed to be transferred or issued by the Company or such
Restricted Subsidiary, as the case may be, pursuant to the Restricted Payment.
The fair market value of any non-cash Restricted Payment shall be determined by
the Board of Directors whose resolution with respect thereto shall be delivered
to the Trustee. Not later than the date of making any Restricted Payment, the
Company shall deliver to the Trustee an Officers' Certificate stating that such
Restricted Payment is permitted and setting forth the basis upon which the
calculations required by Section 4.07 were computed.

Section 4.08      Dividend And Other Payment Restrictions Affecting Restricted
                  Subsidiaries.

                  The Company shall not, and shall not permit any of its
Restricted Subsidiaries to, directly or indirectly, create or otherwise cause or
suffer to exist or become effective any encumbrance or restriction on the
ability of any Restricted Subsidiary to (i)(A) pay dividends or make any other
distributions to the Company or any of its Restricted Subsidiaries (1) on its
Capital Stock or (2) with respect to any other interest or participation in, or
measured by, its profits, or (B) pay any indebtedness owed to the Company or any
of its Restricted Subsidiaries, (ii) make loans or advances to the Company or
any of its Restricted Subsidiaries, or (iii) transfer any of its properties or
assets to the Company or any of its Restricted Subsidiaries. However, the
preceding restrictions will not apply to encumbrances or restrictions existing
under or by reason of (A) the provisions of security agreements that restrict
the transfer of assets that are subject to a Lien created by such security
agreements, (B) the provisions of agreements governing Indebtedness incurred
pursuant to clause (v) of the second paragraph of Section 4.09, (C) the Senior
Credit Facilities, this Indenture, the Notes, the Exchange Notes, the December
1998 Indenture, the December 1998 Notes, the 2002 Notes, the 2002 Indenture, the
May 2003 Notes and the May 2003 Indenture, (D) applicable law, (E) any
instrument governing Indebtedness or Capital Stock of a Person acquired by the
Company or any of its Restricted Subsidiaries as in effect at the time of such
acquisition (except to the extent such Indebtedness was incurred in connection
with or in contemplation of such acquisition), which encumbrance or restriction
is not applicable to any Person, or the properties or assets of any Person,
other than the Person, or the property or assets of the Person, so acquired,
provided that, in the case of Indebtedness, such Indebtedness was permitted by
the terms of this Indenture to be incurred, (F) by reason of customary
non-assignment provisions in leases entered into in the ordinary course of
business

                                       47

and consistent with past practices, (G) purchase money obligations for
property acquired in the ordinary course of business that impose restrictions of
the nature described in this clause (iii) of the preceding paragraph, (H)
Permitted Refinancing Indebtedness, provided that the restrictions contained in
the agreements governing such Permitted Refinancing Indebtedness are not
materially more restrictive, taken as a whole, than those contained in the
agreements governing the Indebtedness being refinanced, (I) contracts for the
sale of assets, including, without limitation, customary restrictions with
respect to a Subsidiary pursuant to an agreement that has been entered into for
the sale or disposition of all or substantially all of the Capital Stock or
assets of such Subsidiary, (J) agreements relating to secured Indebtedness
otherwise permitted to be incurred pursuant to 4.09 and 4.12 that limit the
right of the debtor to dispose of the assets securing such Indebtedness, (K)
restrictions on cash or other deposits or net worth imposed by customers under
contracts entered into in the ordinary course of business, or (L) customary
provisions in joint venture agreements and other similar agreements entered into
in the ordinary course of business.

Section 4.09      Incurrence of Indebtedness and Issuance Of Preferred Stock.

                  The Company shall not, and shall not permit any of its
Restricted Subsidiaries to, directly or indirectly, create, incur, issue,
assume, guarantee or otherwise become directly or indirectly liable,
contingently or otherwise, with respect to (collectively, "incur") any
Indebtedness (including Acquired Debt) and that the Company shall not issue any
Disqualified Stock and shall not permit any of its Restricted Subsidiaries to
issue any shares of preferred stock; provided, however, that the Company and any
Restricted Subsidiary may incur Indebtedness (including Acquired Debt) or issue
shares of preferred stock if the Fixed Charge Coverage Ratio for the Company's
most recently ended four full fiscal quarters for which internal financial
statements are available immediately preceding the date on which such additional
Indebtedness is incurred or such preferred stock is issued would have been at
least 2.0 to 1.0, determined on a pro forma basis (including a pro forma
application of the net proceeds therefrom), as if the additional Indebtedness
had been incurred, or the preferred stock had been issued, as the case may be,
at the beginning of such four-quarter period.

                  The provisions of the first paragraph of this Section 4.09
shall not apply to the incurrence of any of the following items of Indebtedness
(collectively, "Permitted Debt"):

                  (i) the incurrence by the Company of additional Indebtedness
         under Credit Facilities (and the guarantee thereof by the Guarantors)
         in an aggregate principal amount outstanding pursuant to this clause
         (i) at any one time (with letters of credit being deemed to have a
         principal amount equal to the maximum potential liability of the
         Company and its Restricted Subsidiaries thereunder), including all
         Permitted Refinancing Indebtedness then outstanding incurred to refund,
         refinance or replace any other Indebtedness incurred pursuant to this
         clause (i), not to exceed $750.0 million less the aggregate amount of
         all Net Proceeds of Asset Sales applied to repay any such Indebtedness
         pursuant to Section 4.10;

                  (ii) the incurrence by the Company and its Restricted
         Subsidiaries of the Existing Indebtedness;

                                       48

                  (iii) the incurrence by the Company and the Guarantors of
         $400.0 million in aggregate principal amount of each of the Notes and
         the Exchange Notes and the Subsidiary Guarantees thereof;

                  (iv) the incurrence by the Company or any of its Restricted
         Subsidiaries of Indebtedness represented by Capital Lease Obligations,
         mortgage financings or purchase money obligations, in each case
         incurred for the purpose of financing all or any part of the purchase
         price or cost of construction or improvement of property, plant or
         equipment used in the business of the Company or such Restricted
         Subsidiary, in an aggregate principal amount, including all Permitted
         Refinancing Indebtedness then outstanding incurred to refund, refinance
         or replace any other Indebtedness incurred pursuant to this clause
         (iv), not to exceed $100.0 million at any time outstanding;

                  (v) the incurrence by the Company or any of its Restricted
         Subsidiaries of Indebtedness in connection with the acquisition of
         assets or a new Restricted Subsidiary; provided that such Indebtedness
         was incurred by the prior owner of such assets or such Restricted
         Subsidiary prior to such acquisition by the Company or one of its
         Restricted Subsidiaries and was not incurred in connection with, or in
         contemplation of, such acquisition by the Company or one of its
         Restricted Subsidiaries; and provided further that the principal amount
         (or accreted value, as applicable) of such Indebtedness, together with
         any other outstanding Indebtedness incurred pursuant to this clause
         (v), does not exceed $50.0 million;

                  (vi) the incurrence by the Company or any of its Restricted
         Subsidiaries of Permitted Refinancing Indebtedness in exchange for, or
         the net proceeds of which are used to refund, refinance or replace,
         Indebtedness that was permitted by this Indenture to be incurred (other
         than intercompany Indebtedness or Indebtedness incurred pursuant to
         clause (i) above);

                  (vii) Indebtedness incurred by the Company or any of its
         Restricted Subsidiaries constituting reimbursement obligations with
         respect to letters of credit issued in the ordinary course of business
         in respect of workers' compensation claims or self-insurance, or other
         Indebtedness with respect to reimbursement type obligations regarding
         workers' compensation claims; provided, however, that upon the drawing
         of such letters of credit or the incurrence of such Indebtedness, such
         obligations are reimbursed within 30 days following such drawing or
         incurrence;

                  (viii) Indebtedness arising from agreements of the Company or
         a Restricted Subsidiary providing for indemnification, adjustment of
         purchase price or similar obligations, in each case, incurred or
         assumed in connection with the disposition of any business, assets or a
         Subsidiary, other than guarantees of Indebtedness incurred by any
         Person acquiring all or any portion of such business, assets or a
         Subsidiary for the purpose of financing such acquisition; provided,
         however, that (A) such Indebtedness is not reflected on the balance
         sheet of the Company or any Restricted Subsidiary (contingent
         obligations referred to in a footnote to financial statements and not
         otherwise reflected on the balance sheet shall not be deemed to be
         reflected on such balance sheet for purposes of this clause (A)) and
         (B) the maximum assumable liability in respect of all

                                       49

         such Indebtedness shall at no time exceed the gross proceeds including
         noncash proceeds (the fair market value of such noncash proceeds being
         measured at the time received and without giving effect to any
         subsequent changes in value) actually received by the Company and its
         Restricted Subsidiaries in connection with such disposition;

                  (ix) the incurrence by the Company or any of its Restricted
         Subsidiaries of intercompany Indebtedness between or among the Company
         and any of its Restricted Subsidiaries; provided, however, that (A) if
         the Company is the obligor on such Indebtedness, such Indebtedness is
         expressly subordinated to the prior payment in full in cash of all
         Obligations with respect to the Notes and (B)(1) any subsequent
         issuance or transfer of Equity Interests that results in any such
         Indebtedness being held by a Person other than the Company or one of
         its Restricted Subsidiaries and (2) any sale or other transfer of any
         such Indebtedness to a Person that is not either the Company or one of
         its Restricted Subsidiaries shall be deemed, in each case, to
         constitute an incurrence of such Indebtedness by the Company or such
         Restricted Subsidiary, as the case may be;

                  (x) the incurrence by the Company or any of the Guarantors of
         Hedging Obligations that are incurred for the purpose of (A) fixing,
         hedging or capping interest rate risk with respect to any floating rate
         Indebtedness that is permitted by the terms of this Indenture to be
         outstanding or (B) protecting the Company and its Restricted
         Subsidiaries against changes in currency exchange rates;

                  (xi) the guarantee by the Company or any of the Guarantors of
         Indebtedness of the Company or a Restricted Subsidiary of the Company
         that was permitted to be incurred by another provision of this Section
         4.09;

                  (xii) the incurrence by the Company's Unrestricted
         Subsidiaries of Non-Recourse Debt, provided, however, that if any such
         Indebtedness ceases to be Non-Recourse Debt of an Unrestricted
         Subsidiary, such event shall be deemed to constitute an incurrence of
         Indebtedness by a Restricted Subsidiary of the Company that was not
         permitted by this clause (xii), and the issuance of preferred stock by
         Unrestricted Subsidiaries;

                  (xiii) obligations in respect of performance and surety bonds
         and completion guarantees provided by the Company or any Restricted
         Subsidiaries in the ordinary course of business; and

                  (xiv) the incurrence by the Company or any of its Restricted
         Subsidiaries of additional Indebtedness in an aggregate principal
         amount (or accreted value, as applicable) at any time outstanding,
         including all Permitted Refinancing Indebtedness then outstanding
         incurred to refund, refinance or replace any other Indebtedness
         incurred pursuant to this clause (xiv), not to exceed $100.0 million.

                  For purposes of determining compliance with this Section 4.09,
in the event that an item of Indebtedness meets the criteria of more than one of
the categories of Permitted Debt described in clauses (i) through (xiv) above or
is entitled to be incurred pursuant to the first paragraph of this Section 4.09,
the Company shall, in its sole discretion, classify, or later

                                       50

reclassify, such item of Indebtedness in any manner that complies with this
covenant. Accrual of interest, the accretion of accreted value and the payment
of interest in the form of additional Indebtedness shall not be deemed to be an
incurrence of Indebtedness for purposes of this Section 4.09.

Section 4.10      Asset Sales.

                  The Company shall not, and shall not permit any of its
Restricted Subsidiaries to, consummate an Asset Sale unless (i) the Company or
the Restricted Subsidiary, as the case may be, receives consideration at the
time of such Asset Sale at least equal to the fair market value (evidenced by an
Officers' Certificate delivered to the Trustee which will include a resolution
of the Board of Directors with respect to such fair market value in the event
such Asset Sale involves aggregate consideration in excess of $10.0 million) of
the assets or Equity Interests issued or sold or otherwise disposed of and (ii)
at least 80% of the consideration therefor received by the Company or such
Restricted Subsidiary, as the case may be, consists of cash, Cash Equivalents
and/or Marketable Securities; provided, however, that (A) the amount of any
Senior Debt of the Company or such Restricted Subsidiary that is assumed by the
transferee in any such transaction and (B) any consideration received by the
Company or such Restricted Subsidiary, as the case may be, that consists of (1)
all or substantially all of the assets of one or more Similar Businesses, (2)
other long-term assets that are used or useful in one or more Similar Businesses
and (3) Permitted Securities shall be deemed to be cash for purposes of this
provision.

                  Within 365 days after the receipt of any Net Proceeds from an
Asset Sale, the Company may apply such Net Proceeds, at its option, (i) to repay
Indebtedness under a Credit Facility, (ii) to the acquisition of Permitted
Securities, (iii) to the acquisition of all or substantially all of the assets
of one or more Similar Businesses, (iv) to the making of a capital expenditure
or (v) to the acquisition of other long-term assets in a Similar Business.
Pending the final application of any such Net Proceeds, the Company may
temporarily reduce Indebtedness under a Credit Facility or otherwise invest such
Net Proceeds in any manner that is not prohibited by this Indenture. Any Net
Proceeds from Asset Sales that are not applied or invested as provided in the
first sentence of this paragraph shall be deemed to constitute "Excess
Proceeds". When the aggregate amount of Excess Proceeds exceeds $10.0 million,
the Company will be required to make an offer to all Holders of the Notes (an
"Asset Sale Offer") and any other Indebtedness that ranks pari passu with the
Notes (including, without limitation, the December 1998 Notes, the 2002 Notes
and the May 2003 Notes) that, by its terms, requires the Company to offer to
repurchase such Indebtedness with such Excess Proceeds to purchase the maximum
principal amount of Notes and pari passu Indebtedness that may be purchased out
of such Excess Proceeds at an offer price in cash in an amount equal to 100% of
the principal amount thereof plus accrued and unpaid interest thereon, if any,
to the date of purchase, in accordance with the procedures set forth in this
Indenture. To the extent that the aggregate amount of Notes or pari passu
Indebtedness tendered pursuant to an Asset Sale Offer is less than the Excess
Proceeds, the Company may use any Excess Proceeds for general corporate
purposes. If the aggregate principal amount of Notes or pari passu Indebtedness
surrendered by Holders thereof exceeds the amount of Excess Proceeds in an Asset
Sale Offer, the Company shall repurchase such Indebtedness on a pro rata basis
and the Trustee shall select the Notes to be

                                       51

purchased on a pro rata basis. Upon completion of such offer to purchase, the
amount of Excess Proceeds shall be reset at zero.

Section 4.11      Transactions With Affiliates.

                  The Company shall not, and shall not permit any of its
Restricted Subsidiaries to, make any payment to, or sell, lease, transfer or
otherwise dispose of any of its properties or assets to, or purchase any
property or assets from, or enter into or make or amend any transaction,
contract, agreement, understanding, loan, advance or guarantee with, or for the
benefit of, any Affiliate (each of the foregoing, an "Affiliate Transaction"),
unless (i) such Affiliate Transaction is on terms that are no less favorable to
the Company or the relevant Restricted Subsidiary than those that would have
been obtained in a comparable transaction by the Company or such Restricted
Subsidiary with an unrelated Person and (ii) the Company delivers to the Trustee
(A) with respect to any Affiliate Transaction or series of related Affiliate
Transactions involving aggregate consideration in excess of $5.0 million, a
resolution of the Board of Directors set forth in an Officers' Certificate
certifying that such Affiliate Transaction complies with clause (i) above and
that such Affiliate Transaction has been approved by a majority of the
disinterested members of the Board of Directors and (B) with respect to any
Affiliate Transaction or series of related Affiliate Transactions involving
aggregate consideration in excess of $15.0 million, an opinion as to the
fairness to the Holders of such Affiliate Transaction from a financial point of
view issued by an accounting, appraisal or investment banking firm of national
standing.

                  The foregoing provisions shall not prohibit: (i) any
employment agreement entered into by the Company or any of its Restricted
Subsidiaries in the ordinary course of business; (ii) any transaction with a
Lehman Investor; (iii) any transaction between or among the Company and/or its
Restricted Subsidiaries; (iv) transactions between the Company or any of its
Restricted Subsidiaries, on the one hand, and a Permitted Joint Venture, on the
other hand, on terms that are not materially less favorable to the Company or
the applicable Restricted Subsidiary of the Company than those that could have
been obtained from an unaffiliated third party; provided that (A) in the case of
any such transaction or series of related transactions pursuant to this clause
(iv) involving aggregate consideration in excess of $5.0 million but less than
$25.0 million, such transaction or series of transactions (or the agreement
pursuant to which the transactions were executed) was approved by the Company's
Chief Executive Officer or Chief Financial Officer and (B) in the case of any
such transaction or series of related transactions pursuant to this clause (iv)
involving aggregate consideration equal to or in excess of $25.0 million, such
transaction or series of related transactions (or the agreement pursuant to
which the transactions were executed) was approved by a majority of the
disinterested members of the Board of Directors; (v) any transaction pursuant to
and in accordance with the provisions of the Transaction Documents as the same
are in effect on the date of this Indenture; and (vi) any Restricted Payment
that is permitted by the provisions of Section 4.07.

Section 4.12      Liens.

                  The Company shall not, and shall not permit any of its
Restricted Subsidiaries to, directly or indirectly, create, incur, assume or
suffer to exist any Lien (other than Permitted Liens) securing Indebtedness on
any asset now owned or hereafter acquired, or any income or

                                       52

profits therefrom or assign or convey any right to receive income therefrom,
unless all payments due under this Indenture and the Notes are secured on an
equal and ratable basis with the Obligations so secured until such time as such
Obligations are no longer secured by a Lien.

Section 4.13      Future Subsidiary Guarantees.

                  If the Company or any of its Subsidiaries shall acquire or
create a Subsidiary (other than a Foreign Subsidiary or an Unrestricted
Subsidiary) after the date of this Indenture, then such Subsidiary shall execute
a Subsidiary Guarantee, in the form of the Supplemental Indenture attached
hereto as Exhibit E, and the Form of Notation on Senior Subordinated Note,
attached hereto as Exhibit F, and deliver an opinion of counsel as to the
validity of such Subsidiary Guarantee, in accordance with the terms of this
Indenture. The Subsidiary Guarantee of each Guarantor will be subordinated to
the prior payment in full of all Senior Debt of such Guarantor, which would
include the guarantees of amounts borrowed under the Senior Credit Facilities.
The obligations of each Guarantor under its Subsidiary Guarantee will be limited
so as not to constitute a fraudulent conveyance under applicable law.

                  Notwithstanding the foregoing paragraph, for so long as
certain covenants are suspended pursuant to Section 4.18 hereof, no newly
acquired or created Subsidiary will be required to execute a Subsidiary
Guarantee or the related Notation on Senior Subordinated Note unless such
Subsidiary Guarantees Indebtedness of the Company under a Credit Facility.
However, any Subsidiary (other than a Foreign Subsidiary or an Unrestricted
Subsidiary) that Guarantees any Indebtedness of the Company under a Credit
Facility will become a Subsidiary Guarantor and, if at any time certain
covenants are reinstituted pursuant to Section 4.18 hereof, any newly acquired
or created Subsidiary (other than a Foreign Subsidiary or an Unrestricted
Subsidiary) will Guarantee the Notes on the terms and conditions set forth in
this Indenture.

                  No Guarantor may consolidate with or merge with or into
(whether or not such Guarantor is the surviving Person) another Person (except
the Company or another Guarantor) unless (i) subject to the provisions of the
following paragraph, the Person formed by or surviving any such consolidation or
merger (if other than such Guarantor) or to which such sale, assignment,
transfer, lease, conveyance or other disposition shall have been made assumes
all the obligations of such Guarantor pursuant to a supplemental indenture in
form and substance reasonably satisfactory to the Trustee, under the Notes and
this Indenture; (ii) immediately after giving effect to such transaction, no
Default or Event of Default exists; and (iii) the Company (A) would be permitted
by virtue of the Company's pro forma Fixed Charge Coverage Ratio, immediately
after giving effect to such transaction, to incur at least $1.00 of additional
Indebtedness pursuant to the Fixed Charge Coverage Ratio test set forth in
Section 4.09 or (B) would have a pro forma Fixed Charge Coverage Ratio that is
greater than the actual Fixed Charge Coverage Ratio for the same four-quarter
period without giving pro forma effect to such transaction.

                  Notwithstanding the foregoing clause (iii), (i) any Guarantor
may consolidate with, merge into or transfer all or part of its properties and
assets to the Company or to another Guarantor and (ii) any Guarantor may merge
with an Affiliate that has no significant assets or liabilities and was
incorporated solely for the purpose of reincorporating such Guarantor in

                                       53

another State of the United States so long as the amount of Indebtedness of the
Company and its Restricted Subsidiaries is not increased thereby.

                  In the event of a sale or other disposition of all of the
assets of any Guarantor, by way of merger, consolidation or otherwise, or a sale
or other disposition of all of the capital stock of any Guarantor, then such
Guarantor (in the event of a sale or other disposition, by way of such a merger,
consolidation or otherwise, of all of the capital stock of such Guarantor) or
the corporation acquiring the property (in the event of a sale or other
disposition of all of the assets of such Guarantor) will be released and
relieved of any obligations under its Subsidiary Guarantee; provided that the
Net Proceeds of such sale or other disposition are applied in accordance with
the applicable provisions of Section 4.10.

Section 4.14      Corporate Existence.

                  Subject to Article 5 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 Restricted Subsidiaries, in accordance with the respective
organizational documents (as the same may be amended from time to time) of the
Company or any such Restricted Subsidiary and (ii) the rights (charter and
statutory), licenses and franchises of the Company and its Restricted
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 Restricted 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 Restricted Subsidiaries, taken as
a whole, and that the loss thereof is not adverse in any material respect to the
Holders of the Notes.

Section 4.15      Offer To Repurchase Upon Change Of Control.

                  (a) Upon the occurrence of a Change of Control, each Holder of
Notes shall have the right to require the Company to repurchase all or any part
(equal to $1,000 or an integral multiple thereof) of such Holder's Notes
pursuant to the offer described below (the "Change of Control Offer") at an
offer price in cash equal to 101% of the aggregate principal amount thereof plus
accrued and unpaid interest and Additional Interest thereon, if any, to the date
of purchase (the "Change of Control Payment"). Within ten days following any
Change of Control, the Company shall mail a notice to each Holder describing the
transaction or transactions that constitute the Change of Control and offering
to repurchase Notes on the date specified in such notice, which date shall be no
earlier than 30 days and no later than 60 days from the date such notice is
mailed (the "Change of Control Payment Date"). Such notice, which shall govern
the terms of the Change of Control offer, shall state: (i) that the Change of
Control Offer is being made pursuant to this Section 4.15 and that all Notes
tendered will be accepted for payment; (ii) the purchase price and the purchase
date; (iii) that any Note not tendered will continue to accrue interest; (iv)
that, unless the Company defaults in the payment of the Change of Control
Payment, all Notes accepted for payment pursuant to the Change of Control Offer
shall cease to accrue interest after the Change of Control Payment Date; (v)
that Holders electing to have any Notes purchased pursuant to a Change of
Control Offer will be required to surrender the Notes, with the form entitled
"Option of Holder to Elect Purchase" on the reverse of the Notes completed, to
the Paying Agent at the address specified in the notice prior to the close of

                                       54

business on the third Business Day preceding the Change of Control Payment Date;
(vi) that Holders will be entitled to withdraw their election if the Paying
Agent receives, not later than the close of business on the second Business Day
preceding the Change of Control Payment Date, a telegram, telex, facsimile
transmission or letter setting forth the name of the Holder, the principal
amount of Notes delivered for purchase, and a statement that such Holder is
withdrawing his election to have the Notes purchased; and (vii) that Holders
whose Notes are being purchased only in part will be issued new Notes equal in
principal amount to the unpurchased portion of the Notes surrendered, which
unpurchased portion must be equal to $1,000 in principal amount or an integral
multiple thereof. The Company shall comply with the requirements of Rule 14e-1
under the Exchange Act and any other securities laws and regulations thereunder
to the extent such laws and regulations are applicable in connection with the
repurchase of Notes in connection with a Change of Control.

                  (b) On the Change of Control Payment Date, the Company shall,
to the extent lawful, (i) accept for payment all Notes or portions thereof
properly tendered pursuant to the Change of Control Offer, (ii) deposit with the
Paying Agent an amount equal to the Change of Control Payment in respect of all
Notes or portions thereof so tendered and (iii) deliver or cause to be delivered
to the Trustee the Notes so accepted together with an Officers' Certificate
stating the aggregate principal amount of Notes or portions thereof being
purchased by the Company. The Paying Agent shall promptly mail to each Holder of
Notes so tendered the Change of Control Payment for such Notes, and the Trustee
shall promptly authenticate and mail (or cause to be transferred by book entry)
to each Holder a new Note equal in principal amount to any unpurchased portion
of the Notes surrendered, if any; provided that each such new Note shall be in a
principal amount of $1,000 or an integral multiple thereof. Prior to mailing a
Change of Control Offer, but in any event within 90 days following a Change of
Control, the Company shall either repay all outstanding Senior Debt or offer to
repay all Senior Debt and terminate all commitments thereunder of each lender
who has accepted such offer or obtain the requisite consents, if any, under all
agreements governing outstanding Senior Debt to permit the repurchase of Notes
required by this Section 4.15. The Company shall publicly announce the results
of the Change of Control Offer on or as soon as practicable after the Change of
Control Payment Date.

Section 4.16      No Senior Subordinated Debt.

                  The Company shall not incur, create, issue, assume, guarantee
or otherwise become liable for any Indebtedness that is subordinate or junior in
right of payment to any Senior Debt and senior in any respect in right of
payment to the Notes. No Guarantor shall incur, create, issue, assume, guarantee
or otherwise become liable for any Indebtedness that is subordinate or junior in
right of payment to any Senior Debt of a Guarantor and senior in any respect in
right of payment to any of the Subsidiary Guarantees.

Section 4.17      Payments For Consent.

                  Neither the Company nor any of its Subsidiaries shall,
directly or indirectly, pay or cause to be paid any consideration, whether by
way of interest, fee or otherwise, to any Holder of any Notes for or as an
inducement to any consent, waiver or amendment of any of the terms or provisions
of this Indenture or the Notes unless such consideration is offered to be paid
or is paid

                                       55

to all Holders of the Notes that consent, waive or agree to amend in the time
frame set forth in the solicitation documents relating to such consent, waiver
or agreement.

Section 4.18      Changes in Covenants when Notes Rated Investment Grade.

                  If on any date following the date of this Indenture: (i) the
Notes are rated Baa3 or better by Moody's and BBB- or better by S&P (or, if
either such entity ceases to rate the Notes for reasons outside of the control
of the Company, the equivalent investment grade credit rating from any other
"nationally recognized statistical rating organization" within the meaning of
Rule 15c3-1(c)(2)(vi)(F) under the Exchange Act selected by Company as a
replacement agency) and (ii) no Default or Event of Default shall have occurred
and be continuing, then, beginning on that day and subject to the provisions of
the following paragraph, the provisions and covenants contained in Sections
4.07, 4.08, 4.09, 4.10, 4.11 and 4.17 hereof, clauses (iii)(A) and (B) of the
third paragraph of Section 4.13 hereof and clauses (iv)(A) and (B) of the first
paragraph of Section 5.01 hereof will be suspended.

                  In addition, following the achievement of such investment
grade ratings, (i) the Subsidiary Guarantees of the Company's Restricted
Subsidiaries will be released at the time of the release of Guarantees under all
outstanding Credit Facilities; provided that in the event that any such
Restricted Subsidiary thereafter Guarantees any Indebtedness of the Company
under any Credit Facility (or if any released Guarantee under any Credit
Facility is reinstated or renewed), or if at any time certain covenants are
reinstituted as provided in the following paragraph, then such Restricted
Subsidiary will Guarantee the Notes on the terms and conditions set forth in
this Indenture and (ii) as described in Section 4.13 hereof, no Restricted
Subsidiary thereafter acquired or created will be required to execute a
Subsidiary Guarantee unless such Subsidiary Guarantees Indebtedness of the
Company under a Credit Facility.

                  Notwithstanding the foregoing, if the rating assigned to the
Notes by any such rating agency should subsequently decline to below Baa3 or
BBB-, respectively, the foregoing covenants shall be reinstituted as of and from
the date of such rating decline. For purposes of determining whether a
Restricted Payment exceeds the allowable amount under the calculation described
in subparagraphs (i) through (iv) of Section 4.07(c) hereof, the covenant
contained in Section 4.07 hereof will be interpreted as if it had been in effect
since the date of this Indenture. However, no default will be deemed to have
occurred as a result of the provisions and covenants contained in Sections 4.07,
4.08, 4.09, 4.10, 4.11 and 4.17 hereof, clauses (iii)(A) and (B) of the third
paragraph of Section 4.13 hereof and clauses (iv)(A) and (B) of the first
paragraph of Section 5.01 hereof while those provisions and covenants were
suspended.

                                   ARTICLE 5.
                                   SUCCESSORS

Section 5.01      Merger, Consolidation, Or Sale Of Assets.

                  The Company may not consolidate or merge with or into (whether
or not the Company is the surviving corporation), or sell, assign, transfer,
lease, convey or otherwise dispose of all or substantially all of its properties
or assets in one or more related transactions, to another Person unless (i) the
Company is the surviving corporation or the Person formed by or

                                       56

surviving any such consolidation or merger (if other than the Company) or to
which such sale, assignment, transfer, lease, conveyance or other disposition
shall have been made is a corporation organized or existing under the laws of
the United States, any state thereof or the District of Columbia; (ii) the
Person formed by or surviving any such consolidation or merger (if other than
the Company) or the Person to which such sale, assignment, transfer, lease,
conveyance or other disposition shall have been made assumes all the obligations
of the Company under the Registration Rights Agreement, the Notes and this
Indenture pursuant to a supplemental indenture in a form reasonably satisfactory
to the Trustee; (iii) immediately after such transaction no Default or Event of
Default exists; and (iv) except in the case of a merger of the Company with or
into a Wholly Owned Restricted Subsidiary of the Company, the Company or the
Person formed by or surviving any such consolidation or merger (if other than
the Company), or to which such sale, assignment, transfer, lease, conveyance or
other disposition shall have been made, after giving pro forma effect to such
transaction as if such transaction had occurred at the beginning of the most
recently ended four full fiscal quarters for which internal financial statements
are available immediately preceding such transaction either: (A) would be
permitted to incur at least $1.00 of additional Indebtedness pursuant to the
Fixed Charge Coverage Ratio test set forth in the first paragraph of Section
4.09 or (B) would have a pro forma Fixed Charge Coverage Ratio that is greater
than the actual Fixed Charge Coverage Ratio for the same four-quarter period
without giving pro forma effect to such transaction.

                  Notwithstanding clause (iv) in the immediately foregoing
paragraph, (i) any Restricted Subsidiary may consolidate with, merge into or
transfer all or part of its properties and assets to the Company; and (ii) the
Company may merge with an Affiliate that has no significant assets or
liabilities and was incorporated solely for the purpose of reincorporating the
Company in another State of the United States so long as the amount of
Indebtedness of the Company and its Restricted Subsidiaries is not increased
thereby.

Section 5.02      Successor Corporation Substituted.

                  Upon any consolidation or merger, or any sale, assignment,
transfer, lease, conveyance or other disposition of all or substantially all of
the assets of the Company in accordance with Section 5.01 hereof, the successor
corporation formed by such consolidation or into or with which the Company is
merged or to which such sale, assignment, transfer, lease, conveyance or other
disposition is made shall succeed to, be substituted for (so that from and after
the date of such consolidation, merger, sale, lease, conveyance or other
disposition, the provisions of this Indenture referring to the "Company" shall
refer instead to the successor corporation and not to the Company), and may
exercise every right and power of, the Company under this Indenture with the
same effect as if such successor Person had been named as the Company herein;
provided, however, that the predecessor Company shall not be relieved from the
obligation to pay the principal of and interest on the Notes except in the case
of a sale of all of the Company's assets that meets the requirements of Section
5.01 hereof.

                                       57

                                   ARTICLE 6.
                              DEFAULTS AND REMEDIES

Section 6.01      Events of Default.

                  An "Event of Default" occurs if:

                  (a) the Company defaults in the payment when due of interest
         on, or Additional Interest, if any, with respect to, the Notes and such
         default continues for a period of 30 days (whether or not prohibited by
         the subordination provisions of this Indenture);

                  (b) the Company defaults in the payment when due of the
         principal of or premium, if any, on the Notes (whether or not
         prohibited by the subordination provisions of this Indenture);

                  (c) the Company fails to comply with any of the provisions of
         Section 4.10, 4.15, or 5.01 hereof;

                  (d) the Company fails to observe or perform any other covenant
         or other agreement in this Indenture or the Notes for 60 days after
         notice to the Company by the Trustee or the Holders of at least 25% in
         aggregate principal amount of the Notes then outstanding;

                  (e) a default occurs under any mortgage, indenture or
         instrument under which there may be issued or by which there may be
         secured or evidenced any Indebtedness for money borrowed by the Company
         or any of its Restricted Subsidiaries (or the payment of which is
         guaranteed by the Company or any of its Restricted Subsidiaries),
         whether such Indebtedness or guarantee now exists, or is created after
         the date of this Indenture, which default results in the acceleration
         of such Indebtedness prior to its express maturity and, in each case,
         the principal amount of such Indebtedness, together with the principal
         amount of any other such Indebtedness, the maturity of which has been
         so accelerated, aggregates $25.0 million or more;

                  (f) the Company or any of its Restricted Subsidiaries is
         subject to a final judgments aggregating in excess of $25.0 million,
         which judgments are not paid, discharged or stayed for a period of 60
         days;

                  (g) the Company or any of its Significant Subsidiaries or any
         group of Subsidiaries that, taken as a whole, would constitute a
         Significant Subsidiary pursuant to or within the meaning of Bankruptcy
         Law:

                           (i) commences a voluntary case,

                           (ii) consents to the entry of an order for relief
                  against it in an involuntary case,

                                       58

                           (iii) consents to the appointment of a custodian of
                  it or for all or substantially all of its property,

                           (iv) makes a general assignment for the benefit of
                  its creditors, or

                           (v) generally is not paying its debts as they become
                  due;

                  (h) a court of competent jurisdiction enters an order or
         decree under any Bankruptcy Law that:

                           (i) is for relief against the Company or any of its
                  Significant Subsidiaries or any group of Subsidiaries that,
                  taken as a whole, would constitute a Significant Subsidiary in
                  an involuntary case;

                           (ii) appoints a custodian of the Company or any of
                  its Significant Subsidiaries or any group of Subsidiaries
                  that, taken as a whole, would constitute a Significant
                  Subsidiary or for all or substantially all of the property of
                  the Company or any of its Significant Subsidiaries or any
                  group of Subsidiaries that, taken as a whole, would constitute
                  a Significant Subsidiary; or

                           (iii) orders the liquidation of the Company or any of
                  its Significant Subsidiaries or any group of Subsidiaries
                  that, taken as a whole, would constitute a Significant
                  Subsidiary;

                  and the order or decree remains unstayed and in effect for 60
                  consecutive days; or

                           (i) except as permitted herein, any Subsidiary
                  Guarantee shall be held in any judicial proceeding to be
                  unenforceable or invalid.

                  The Holders of a majority in aggregate principal amount of the
Notes then outstanding by notice to the Trustee may on behalf of the Holders of
all of the Notes waive any existing Default or Event of Default and its
consequences under this Indenture except a continuing Default or Event of
Default in the payment of interest on, or the principal of, the Notes.

Section 6.02      Acceleration.

                  If any Event of Default occurs and is continuing, the Trustee
or the Holders of at least 25% in principal amount of the then outstanding Notes
may declare all the Notes to be due and payable immediately; provided, however,
that so long as any Designated Senior Debt is outstanding, such declaration
shall not become effective until the earlier of (i) the day which is five
Business Days after receipt by the Representatives of Designated Senior Debt of
such notice of acceleration or (ii) the date of acceleration of any Designated
Senior Debt. Notwithstanding the foregoing, in the case of an Event of Default
arising from certain events of bankruptcy or insolvency, with respect to the
Company or any Significant Subsidiary or any group of Subsidiaries that, taken
as a whole, would constitute a Significant Subsidiary, all outstanding Notes
will become due and payable without further action or notice. Holders of the
Notes may not enforce this Indenture or the Notes except as provided in this
Indenture. Subject to certain

                                       59

limitations, Holders of a majority in principal amount of the then outstanding
Notes may direct the Trustee in its exercise of any trust or power. The Trustee
may withhold from Holders of the Notes notice of any continuing Default or Event
of Default (except a Default or Event of Default relating to the payment of
principal or interest) if it determines that withholding notice is in their
interest.

                  In the case of any Event of Default occurring by reason of any
willful action (or inaction) taken (or not taken) by or on behalf of the Company
with the intention of avoiding payment of the premium that the Company would
have had to pay if the Company then had elected to redeem the Notes pursuant to
the optional redemption provisions of this Indenture, an equivalent premium
shall also become and be immediately due and payable to the extent permitted by
law upon the acceleration of the Notes. If an Event of Default occurs prior to
January 15, 2009 by reason of any willful action (or inaction) taken (or not
taken) by or on behalf of the Company with the intention of avoiding the
prohibition on redemption of the Notes prior to January 15, 2009 then the
premium specified below (expressed as a percentage of the principal amount of
the Notes on the date of payment that would otherwise be due but for the
provisions of this sentence) shall also become immediately due and payable to
the extent permitted by law upon the acceleration of the Notes during the
twelve-month period ending on January 15 of the years indicated below:

            YEAR                                             PERCENTAGE
            ----                                             ----------
            2004...................................................6.125%
            2005...................................................5.513%
            2006...................................................4.900%
            2007...................................................4.288%
            2008...................................................3.675%
            2009...................................................3.063%

Section 6.03      Other Remedies.

                  If an Event of Default occurs and is continuing, the Trustee
may pursue any available remedy to collect the payment of principal, premium, 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 6.04      Waiver of Past Defaults.

                  Holders of not less than a majority in aggregate principal
amount of the then outstanding Notes by notice to the Trustee may on behalf of
the Holders of all of the Notes waive an existing Default or Event of Default
and its consequences hereunder, except a continuing Default or Event of Default
in the payment of the principal of, premium or Additional Interest, if

                                       60

any, or interest on, the Notes including in connection with an offer to
purchase; provided, however, that the Holders of a majority in aggregate
principal amount at maturity of the then outstanding Notes may rescind an
acceleration and its consequences, including any related payment default that
resulted from such acceleration. 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 consequent thereon.

Section 6.05      Control By Majority.

                  Holders of a majority in 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 or that the Trustee
determines may be unduly prejudicial to the rights of other Holders of Notes or
that may involve the Trustee in personal liability.

Section 6.06      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 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 loss, 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 6.07      Rights of Holders of Notes to Receive Payment.

                  Notwithstanding any other provision of this Indenture, the
right of any Holder of a Note to receive payment of principal, premium and
Additional Interest, 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.

                                       61

Section 6.08      Collection Suit by Trustee.

                  If an Event of Default specified in Section 6.01(a) or (b)
occurs and is continuing, 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 Additional Interest, 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 6.09      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 7.07 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 7.07 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.

Section 6.10      Priorities.

                  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 7.07 hereof, including payment of all compensation,
         expense and liabilities incurred, and all advances made, by the Trustee
         and the costs and expenses of collection;

                  Second: to Holders of Notes for amounts due and unpaid on the
         Notes for principal, premium and Additional Interest, 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 Additional Interest, if any, and interest, respectively;
         and

                                       62

                  Third: 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 does not apply to a suit by the Trustee, a suit by a
Holder of a Note pursuant to Section 6.07 hereof, or a suit by Holders of more
than 10% in principal amount of the then outstanding Notes.

                                   ARTICLE 7.
                                    TRUSTEE

Section 7.01      Duties Of Trustee.

                  (a) If an Event of Default has occurred and is continuing, 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 person would exercise or use under the circumstances in the conduct of
such person's affairs.

                  (b) Except during the continuance of an Event of Default:

                  (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 or negligence 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 (but need not confirm or investigate
         the accuracy of mathematical calculations or other facts stated
         therein).

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

                                       63

                  (ii) the Trustee shall not be liable for any error of judgment
         made in good faith by a Responsible Officer, 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 6.05 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
paragraphs (a), (b), and (c) of this Section.

                  (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) 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.

Section 7.02      Rights Of Trustee.

                  (a) 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 such
document.

                  (b) Before the Trustee acts or refrains from acting, 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 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

                                       64

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) The Trustee may execute any of the trusts or powers
hereunder or perform any duties hereunder either directly or by or through
agents or attorneys and the Trustee shall not be responsible for any misconduct
or negligence on the part of any agent or attorney appointed with due care by it
hereunder.

                  (h) The Trustee shall not be deemed to have notice of any
Default or Event of Default unless a Responsible Officer of the Trustee has
actual knowledge thereof or unless written notice of any event which is in fact
such a default is received by the Trustee at the Corporate Trust Office of the
Trustee, and such notice references the Notes and this Indenture.

                  (i) Money held by the Trustee in trust hereunder need not be
segregated from other funds except to the extent required by law. The Trustee
shall be under no liability for interest on any money received by it hereunder
except as otherwise agreed in writing with the Company.

                  (j) The rights, privileges, protections, immunities and
benefits given to the Trustee, including, without limitation, its right to be
indemnified, are extended to, and shall be enforceable by, the Trustee in each
of its capacities hereunder, and to each agent, custodian and other Person
employed to act hereunder.

                  (k) The Trustee may request that the Company deliver an
Officers' Certificate setting forth the names of individuals and/or titles of
officers authorized at such time to take specified actions pursuant to this
Indenture, which Officers' Certificate may be signed by any person authorized to
sign an Officers' Certificate, including any person specified as so authorized
in any such certificate previously delivered send not superseded.

Section 7.03      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 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 7.04      Trustee's Disclaimers.

                  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.

                                       65

Section 7.05      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 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, or interest on any Note, the Trustee may withhold the notice if
and so long as a committee of its Responsible Officers in good faith determines
that withholding the notice is in the interests of the Holders of the Notes.

Section 7.06      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 ss. 313(a) (but if no
event described in TIA ss. 313(a) has occurred within the twelve months
preceding the reporting date, no report need be transmitted). The Trustee also
shall comply with TIA ss. 313(b)(2). The Trustee shall also transmit by mail all
reports as required by TIA ss. 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 ss. 313(d).
The Company shall promptly notify the Trustee when the Notes are listed on any
stock exchange.

Section 7.07      Compensation and Indemnity.

                  The Company shall pay to the Trustee from time to time such
compensation as the Company and the Trustee shall from time to time agree in
writing 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 or any predecessor
Trustee against any and all losses, liabilities or expenses, including taxes
(except for taxes based upon the income of the Trustee), 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 7.07) 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 or bad faith. 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. The Company shall defend the claim and the Trustee
shall cooperate in the defense. 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.

                                       66

                  The obligations of the Company under this Section 7.07 shall
survive the satisfaction and discharge of this Indenture and the resignation or
removal of the Trustee.

                  When the Trustee incurs expenses or renders services after an
Event of Default specified in Section 6.01(g) or (h) 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 ss.
313(b)(2) to the extent applicable.

Section 7.08      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.

                  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 30 days
after the retiring Trustee resigns or is removed, the retiring Trustee (at the
Company's expense), 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, 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.

                                       67

                  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 7.07 hereof. Notwithstanding replacement of the Trustee pursuant
to this Section 7.08, the Company's obligations under Section 7.07 hereof shall
continue for the benefit of the retiring Trustee.

Section 7.09      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.

Section 7.10      Eligibility; Disqualification.

                  There shall at all times be a Trustee hereunder that is a
corporation 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 a combined capital and surplus of at
least $50 million 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 ss. 310(a)(1), (2) and (5). The Trustee is subject to TIA
ss. 310(b).

Section 7.11      Preferential Collection of Claims Against Company.

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

                                   ARTICLE 8.
                    LEGAL DEFEASANCE AND COVENANT DEFEASANCE

Section 8.01      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, at any time,
elect to have either Section 8.02 or 8.03 hereof be applied to all outstanding
Notes upon compliance with the conditions set forth below in this Article 8.

Section 8.02      Legal Defeasance and Discharge.

                  Upon the Company's exercise under Section 8.01 hereof of the
option applicable to this Section 8.02, the Company shall, subject to the
satisfaction of the conditions set forth in Section 8.04 hereof, be deemed to
have been discharged from its obligations with respect to all

                                       68

outstanding Notes on 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 the entire Indebtedness
represented by the outstanding Notes, which shall thereafter be deemed to be
"outstanding" only for the purposes of Section 8.05 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 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 8.04 hereof, and as more fully set forth in such Section, payments in
respect of the principal of, premium and Additional Interest, if any, and
interest on such Notes when such payments are due, (b) the Company's obligations
with respect to such Notes under Sections 2.06, 2.07, 2.10 and 4.02 hereof, (c)
the rights, powers, trusts, duties and immunities of the Trustee hereunder and
the Company's obligations in connection therewith and (d) this Article 8.
Subject to compliance with this Article 8, the Company may exercise its option
under this Section 8.02 notwithstanding the prior exercise of its option under
Section 8.03 hereof.

Section 8.03      Covenant defeasance.

                  Upon the Company's exercise under Section 8.01 hereof of the
option applicable to this Section 8.03, the Company shall, subject to the
satisfaction of the conditions set forth in Section 8.04 hereof, be released
from its obligations under Sections 4.03, 4.07, 4.08, 4.09, 4.10, 4.11, 4.12,
4.13, 4.15 and 4.16 and Article 5 hereof with respect to the outstanding Notes
on and after the date the conditions set forth below are satisfied (hereinafter,
"Covenant Defeasance"), and the Notes 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 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 6.01 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 8.01 hereof of the option applicable to this
Section 8.03 hereof, subject to the satisfaction of the conditions set forth in
Section 8.04 hereof, Sections 6.01(d) through 6.01(f) hereof shall not
constitute Events of Default.

Section 8.04      Conditions to Legal or Covenant Defeasance.

                  The following shall be the conditions to the application of
either Section 8.02 or 8.03 hereof to the outstanding Notes:

                  In order to exercise either Legal Defeasance or Covenant
Defeasance:

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                  (a) the Company must irrevocably deposit with the Trustee, in
         trust, for the benefit of the Holders, cash in United States dollars,
         non-callable Government Securities, or a combination thereof, in such
         amounts as will be sufficient, in the opinion of a nationally
         recognized firm of independent public accountants, to pay the principal
         of, premium and Additional Interest, 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 Company must
         specify whether the Notes are being defeased to maturity or to a
         particular redemption date;

                  (b) in the case of an election under Section 8.02 hereof, the
         Company shall have delivered to the Trustee an Opinion of Counsel in
         the United States reasonably acceptable to the Trustee 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, and based thereon such Opinion
         of Counsel shall confirm 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 8.03 hereof, the
         Company shall have delivered to the Trustee an Opinion of Counsel in
         the United States reasonably acceptable to the Trustee confirming that
         the 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) no Default or Event of Default shall have occurred and be
         continuing on the date of such deposit (other than a Default or Event
         of Default resulting from the incurrence of Indebtedness all or a
         portion of the proceeds of which will be used to defease the Notes
         pursuant to this Article 8 concurrently with such incurrence) or
         insofar as Sections 6.01(g) or 6.01(h) hereof is concerned, at any time
         in the period ending on the 91st day after the date of deposit;

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

                  (f) the Company shall have delivered to the Trustee an opinion
         of counsel to the effect that on the 91st day following the deposit,
         the trust funds will not be subject to the effect of any applicable
         bankruptcy, insolvency, reorganization or similar laws affecting
         creditors' rights generally;

                  (g) the Company shall have delivered to the Trustee an
         Officers' Certificate stating that the deposit was not made by the
         Company with the intent of preferring the

                                       70

         Holders over any other creditors of the Company or with the intent of
         defeating, hindering, delaying or defrauding any other creditors of the
         Company; and

                  (h) the Company shall have delivered to the Trustee an
         Officers' Certificate and an Opinion of Counsel, each stating that all
         conditions precedent provided for or relating to the Legal Defeasance
         or the Covenant Defeasance have been complied with.

Section 8.05      Deposited Money and Government Securities to be held in Trust;
                  Other Miscellaneous Provisions.

                  Subject to Section 8.06 hereof, all money and non-callable
Government Securities (including the proceeds thereof) deposited with the
Trustee (or other qualifying trustee, collectively for purposes of this Section
8.05, the "Trustee") pursuant to Section 8.04 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 and
Additional Interest, if any, and interest, 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 non-callable
Government Securities deposited pursuant to Section 8.04 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 8 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 non-callable Government Securities held by
it as provided in Section 8.04 hereof which, in the opinion of a nationally
recognized firm of independent public accountants expressed in a written
certification thereof delivered to the Trustee (which may be the opinion
delivered under Section 8.04(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 8.06      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
and Additional Interest, if any, or interest on any Note and remaining unclaimed
for two years after such principal, premium and Additional Interest, if any, or
interest has become due and payable shall be paid to the Company on its request
or (if then held by the Company) shall be discharged from such trust; and the
Holder of such Note shall thereafter, as a secured 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

                                       71

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.

Section 8.07      Reinstatement.

                  If the Trustee or Paying Agent is unable to apply any United
States dollars or non-callable Government Securities in accordance with Section
8.02 or 8.03 hereof, as the case may be, by reason of any order or judgment of
any court or governmental authority enjoining, restraining or otherwise
prohibiting such application, then the Company's obligations under this
Indenture and the Notes shall be revived and reinstated as though no deposit had
occurred pursuant to Section 8.02 or 8.03 hereof until such time as the Trustee
or Paying Agent is permitted to apply all such money in accordance with Section
8.02 or 8.03 hereof, as the case may be; provided, however, that, if the Company
makes any payment of principal of, premium, 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 9.
                        AMENDMENT, SUPPLEMENT AND WAIVER

Section 9.01      Without Consent of Holders of Notes.

                  Notwithstanding Section 9.02 of this Indenture, the Company
and the Trustee may amend or supplement this Indenture or the Notes 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;

                  (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 5 hereof;

                  (d) 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 legal rights hereunder of any Holder of the Note;

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

                  (f) to conform the text of this Indenture or the Notes to any
         provision of the "Description of the Notes" section of the Company's
         Offering Memorandum, dated December 16, 2003, related to the initial
         offering of the Notes, to the extent that such provision in that
         "Description of the Notes" section was intended to be a verbatim
         recitation of a provision of this Indenture, the Subsidiary Guarantees
         or the Notes.

                                       72

                  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 receipt by the Trustee of the documents
described in Section 7.02 hereof, the Trustee shall join with the Company in the
execution of any amended or supplemental Indenture 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 amended or supplemental Indenture that affects its
own rights, duties or immunities under this Indenture or otherwise.

Section 9.02      With Consent of Holders of Notes.

                  Except as provided below in this Section 9.02, the Company and
the Trustee may amend or supplement this Indenture (including Section 3.09, 4.10
and 4.15 hereof) and the Notes may be amended or supplemented with the consent
of the Holders of at least a majority in principal amount of the Notes then
outstanding (including consents obtained in connection with a tender offer or
exchange offer for the Notes), and, subject to Sections 6.04 and 6.07 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 or the Notes may
be waived with the consent of the Holders of a majority in principal amount of
the then outstanding Notes (including consents obtained in connection with a
tender offer or exchange offer for the Notes).

                  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 7.02
hereof, the Trustee shall join with the Company in the execution of such amended
or supplemental Indenture unless such amended or supplemental Indenture affects
the Trustee's own rights, duties or immunities under this Indenture or
otherwise, in which case the Trustee may in its discretion, but shall not be
obligated to, enter into such amended or supplemental Indenture.

                  The Company may, but shall not be obligated to, fix a record
date for the purpose of determining the Persons entitled to consent to any
indenture supplemental hereto. If a record date is fixed, the Holders on such
record date, or their duly designated proxies, and only such Persons, shall be
entitled to consent to such supplemental indenture, whether or not such Holders
remain Holders after such record date; provided, that unless such consent shall
have become effective by virtue of the requisite percentage having been obtained
prior to the date which is 180 days after such record date, any such consent
previously given shall automatically and without further action by any Holder be
canceled and of no further effect.

                  It shall not be necessary for the consent of the Holders of
Notes under this Section 9.02 to approve the particular form of any proposed
amendment or waiver, but it shall be sufficient if such consent approves the
substance thereof.

                                       73

                  After an amendment, supplement or waiver under this Section
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. Subject to Sections 6.04 and 6.07 hereof, the
Holders of a majority in aggregate principal amount of the Notes then
outstanding may waive compliance in a particular instance by the Company with
any provision of this Indenture or the Notes. However, without the consent of
each Holder affected, an amendment or waiver may not (with respect to any Notes
held by a non-consenting Holder):

                  (a) reduce the principal amount of Notes whose Holders must
         consent to an amendment, supplement or waiver;

                  (b) reduce the principal of or change the fixed maturity of
         any Note or alter or waive any of the provisions with respect to the
         redemption of the Notes except as provided above with respect to
         Sections 4.10 and 4.15 hereof;

                  (c) reduce the rate of or change the time for payment of
         interest, including default interest, on any Note;

                  (d) waive a Default or Event of Default in the payment of
         principal of, or premium and Additional Interest, if any, or interest
         on the Notes (except a rescission of acceleration of the Notes by the
         Holders of at least a majority in aggregate principal amount of the
         then outstanding Notes and a waiver of the payment default that
         resulted from such acceleration);

                  (e) make any Note payable in money other than that stated in
         the Notes;

                  (f) make any change in the provisions of this Indenture
         relating to waivers of past Defaults or the rights of Holders of Notes
         to receive payments of principal of or premium and Additional Interest,
         if any, or interest on the Notes;

                  (g) waive a redemption payment with respect to any Note (other
         than a payment required by Sections 3.09, 4.10 and 4.15 hereof); or

                  (h) make any change in Section 6.04 or 6.07 hereof or in the
         foregoing amendment and waiver provisions.

Section 9.03      Compliance with Trust Indenture Act.

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

Section 9.04      Revocation and Effect of Consents.

                  Until an amendment, supplement or waiver becomes effective, 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 debt as the consenting Holder's Note, even if

                                       74

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. An amendment, supplement or waiver
becomes effective in accordance with its terms and thereafter binds every
Holder.

Section 9.05      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 9.06      Trustee to Sign Amendments, Etc.

                  The Trustee shall sign any amended or supplemental Indenture
authorized pursuant to this Article 9 if the amendment or supplement does not
adversely affect the rights, duties, liabilities or immunities of the Trustee.
The Company may not sign an amendment or supplemental indenture until the Board
of Directors approves it. In executing any amended or supplemental indenture,
the Trustee shall be entitled to receive and (subject to Section 7.01) 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 10.
                              SUBSIDIARY GUARANTEES

Section 10.01     Agreement to Guarantee.

                  Each of the Guarantors hereby agrees as follows:

                  (a) Such Guarantor, jointly and severally with all other
Guarantors, unconditionally guarantees to each Holder of a Note authenticated
and delivered by the Trustee and to the Trustee its successors and assigns,
regardless of the validity and enforceability of this Indenture, the Notes or
the Obligations of the Company under this Indenture or the Notes, that:

                  (i) the principal of, premium, interest and Additional
         Interest, if any, on the Notes will be promptly paid in full when due,
         whether at maturity, by acceleration, redemption or otherwise, and
         interest on the overdue principal of, premium, interest and Additional
         Interest, if any, on the Notes, to the extent lawful, and all other
         Obligations of the Company to the Holders or the Trustee thereunder or
         under this Indenture will be promptly paid in full, all in accordance
         with the terms thereof; and

                  (ii) in case of any extension of time for payment or renewal
         of any Notes or any of such other Obligations, that the same will be
         promptly paid in full when due in

                                       75

         accordance with the terms of the extension or renewal, whether at
         stated maturity, by acceleration or otherwise.

                  (b) Notwithstanding the foregoing, in the event that this
Guarantee would constitute or result in a violation of any applicable fraudulent
conveyance or similar law of any relevant jurisdiction, the liability of the
Guarantors under this Indenture shall be reduced to the maximum amount
permissible under such fraudulent conveyance or similar law.

Section 10.02     Execution and Delivery of Subsidiary Guarantees.

                  (a) To evidence its Subsidiary Guarantees set forth in this
Indenture, each Guarantor hereby agrees that a notation of such Guarantee
substantially in the form attached as Exhibit F to this Indenture shall be
endorsed by an Officer of such Guarantor on each Note authenticated and
delivered by the Trustee on or after the date hereof.

                  (b) Notwithstanding the foregoing, each Guarantor hereby
agrees that its Guarantee set forth herein shall remain in full force and effect
notwithstanding any failure to endorse on each Note a notation of such
Guarantee.

                  (c) If an Officer whose signature is on this Indenture no
longer holds that office at the time the Trustee authenticates the Note on which
a Guarantee is endorsed, the Guarantee shall be valid nevertheless.

                  (d) The delivery of any Note by the Trustee, after the
authentication thereof under this Indenture, shall constitute due delivery of
the Guarantee set forth in this Indenture on behalf of each Guarantor.

                  (e) Each Guarantor hereby agrees that its obligations
hereunder shall be unconditional, regardless of the validity, regularity or
enforceability of the Notes or this Indenture, the absence of any action to
enforce the same, any waiver or consent by any Holder of the Notes with respect
to any provisions hereof or thereof, the recovery 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.

                  (f) Each Guarantor hereby waives diligence, presentment,
demand of payment, filing of claims with a court in the event of insolvency or
bankruptcy of the Company, any right to require a proceeding first against the
Company, protest, notice and all demands whatsoever and covenants that its
Guarantee made pursuant to this Indenture will not be discharged except by
complete performance of the obligations contained in the Notes and this
Indenture.

                  (g) If any Holder or the Trustee is required by any court or
otherwise to return to the Company or any Guarantor, or any custodian, Trustee,
liquidator or other similar official acting in relation to either the Company or
such Guarantor, any amount paid by either to the Trustee or such Holder, the
Guarantee made pursuant to this Indenture, to the extent theretofore discharged,
shall be reinstated in full force and effect.

                                       76

                  (h) Each Guarantor agrees that it shall not be entitled to any
right of subrogation in relation to the Holders in respect of any obligations
guaranteed hereby until payment in full of all obligations guaranteed hereby.
Each Guarantor further agrees that, as between such Guarantor, on the one hand,
and the Holders and the Trustee, on the other hand:

                  (i) the maturity of the Obligations guaranteed hereby may be
         accelerated as provided in Article 6 of this Indenture for the purposes
         of the Guarantee made pursuant to this Indenture, notwithstanding any
         stay, injunction or other prohibition preventing such acceleration in
         respect of the obligations guaranteed hereby; and

                  (ii) in the event of any declaration of acceleration of such
         Obligations as provided in Article 6 of this Indenture, such
         Obligations (whether or not due and payable) shall forthwith become due
         and payable by such Guarantor for the purpose of the Guarantee made
         pursuant to this Indenture.

                  (i) Each Guarantor shall have the right to seek contribution
from any other non-paying Guarantor so long as the exercise of such right does
not impair the rights of the Holders or the Trustee under the Guarantee made
pursuant to this Indenture.

Section 10.03     Guarantors May Consolidate, Etc. on Certain Terms.

                  (a) Except as set forth in Articles 4 and 5 of this Indenture,
nothing contained in this Indenture or in the Notes shall prevent any
consolidation or merger of any Guarantor with or into the Company or any other
Guarantor or shall prevent any transfer, sale or conveyance of the property of
any Guarantor as an entirety or substantially as an entirety, to the Company or
any other Guarantor.

                  (b) Except as set forth in Articles 4 and 5 of this Indenture,
nothing contained in this Indenture or in the Notes shall prevent any
consolidation or merger of any Guarantor with or into a corporation or
corporations other than the Company or any other Guarantor (in each case,
whether or not affiliated with the Guarantor), or successive consolidations or
mergers in which a Guarantor or its successor or successors shall be a party or
parties, or shall prevent any sale or conveyance of the property of any
Guarantor as an entirety or substantially as an entirety, to a corporation other
than the Company or any other Guarantor (in each case, whether or not affiliated
with the Guarantor) authorized to acquire and operate the same; provided,
however, that each Guarantor hereby covenants and agrees that (i) subject to
this Indenture, upon any such consolidation, merger, sale or conveyance, the due
and punctual performance and observance of all of the covenants and conditions
of this Indenture to be performed by such Guarantor, shall be expressly assumed
(in the event that such Guarantor is not the surviving corporation in the
merger), by supplemental indenture satisfactory in form to the Trustee, executed
and delivered to the Trustee, by the corporation formed by such consolidation,
or into which such Guarantor shall have been merged, or by the corporation which
shall have acquired such property and (ii) immediately after giving effect to
such consolidation, merger, sale or conveyance no Default or Event of Default
exists.

                  (c) In case of any such consolidation, merger, sale or
conveyance and upon the assumption by the successor corporation, by supplemental
indenture, executed and delivered

                                       77

to the Trustee and satisfactory in form to the Trustee, of the Guarantee made
pursuant to this Indenture 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 one of the
Guarantors. Such successor corporation thereupon may cause to be signed any or
all of the Guarantees to be endorsed upon the Notes issuable under this
Indenture 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.

Section 10.04     Releases.

                  (a) Concurrently with any sale of assets (including, if
applicable, all of the Capital Stock of a Guarantor), all Liens, if any, in
favor of the Trustee in the assets sold thereby shall be released; provided that
in the event of an Asset Sale, the Net Proceeds from such sale or other
disposition are treated in accordance with the provisions of Section 4.10 of
this Indenture. If the assets sold in such sale or other disposition include all
or substantially all of the assets of a Guarantor or all of the Capital Stock of
a Guarantor, then the Guarantor (in the event of a sale or other disposition of
all of the Capital Stock of such Guarantor) or the Person acquiring the property
(in the event of a sale or other disposition of all or substantially all of the
assets of such Guarantor) shall be released from and relieved of its obligations
under this Indenture and its Guarantee made pursuant hereto; provided that in
the event of an Asset Sale, the Net Proceeds from such sale or other disposition
are treated in accordance with the provisions of Section 4.10 of this Indenture.
Upon delivery by the Company to the Trustee of an Officers' Certificate to the
effect that such sale or other disposition was made by the Company or the
Guarantor, as the case may be, in accordance with the provisions of this
Indenture, including, without limitation, Section 4.10 of this Indenture, the
Trustee shall execute any documents reasonably required in order to evidence the
release of the Guarantor from its obligations under this Indenture and its
Guarantee made pursuant hereto. If the Guarantor is not released from its
obligations under its Guarantee, it shall remain liable for the full amount of
principal of and interest and Additional Interest, if any, on the Notes and for
the other obligations of such Guarantor under this Indenture.

                  (b) Upon the designation of a Guarantors as an Unrestricted
Subsidiary in accordance with the terms of this Indenture, such Guarantor shall
be released and relieved of its obligations under this Indenture. Upon delivery
by the Company to the Trustee of an Officers' Certificate and an Opinion of
Counsel to the effect that such designation of such Guarantor as an Unrestricted
Subsidiary was made by the Company in accordance with the provisions of this
Indenture, including without limitation Section 4.07 hereof, the Trustee shall
execute any documents reasonably required in order to evidence the release of
such Guarantor from its obligations under its Guarantee. 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
10.

                  (c) Each Guarantor shall be released and relieved of its
obligations under this Indenture in accordance with, and subject to, Section
4.18 hereof.

                                       78

Section 10.05     No Recourse Against Others.

                  No past, present or future director, officer, employee,
incorporator, stockholder or agent of any Subsidiary of the Company, as such,
shall have any liability for any obligations of the Company or any Subsidiary of
the Company under the Notes, any Guarantees, this Indenture or for any claim
based on, in respect of, or by reason of, such obligations or their creation.
Each Holder of the Notes by accepting a Note waives and releases all such
liability. The waiver and release are part of the consideration for issuance of
the Notes. Such waiver may not be effective to waive liabilities under the
federal securities laws and it is the view of the Securities and Exchange
Commission that such a waiver is against public policy.

Section 10.06     Subordination of Subsidiary Guarantees

                  The Guarantee of each Guarantor shall be subordinated to the
prior payment in full of all Senior Debt of that Guarantor (in the same manner
and to the same extent that the Notes are subordinated to Senior Debt), which
shall include all guarantees of Senior Debt.

                                   ARTICLE 11.
                                  SUBORDINATION

Section 11.01     Agreement to Subordinate.

                  The Company agrees, and each Holder by accepting a Note
agrees, that the Indebtedness evidenced by the Notes is subordinated in right of
payment, to the extent and in the manner provided in this Article 11, to the
prior payment in full in cash of all Senior Debt (whether outstanding on the
date hereof or hereafter created, incurred, assumed or guaranteed), and that the
subordination is for the benefit of the holders of Senior Debt.

Section 11.02     Liquidation; Dissolution; Bankruptcy.

                  Upon any distribution to creditors of the Company in a
liquidation or dissolution of the Company, in a bankruptcy, reorganization,
insolvency, receivership or similar proceeding relating to the Company or its
property, in an assignment for the benefit of creditors or in any marshalling of
the Company's assets and liabilities, the holders of Senior Debt shall be
entitled to receive payment in full in cash of all Obligations due in respect of
such Senior Debt (including interest after the commencement of any such
proceeding at the rate specified in the applicable Senior Debt, whether or not
an allowable claim in any such proceeding) before the Holders of Notes will be
entitled to receive any payment with respect to the Notes, and until all
Obligations with respect to Senior Debt are paid in full in cash, any
distribution to which the Holders of Notes would be entitled shall be made to
the holders of Senior Debt (except, in each case, that Holders of Notes may
receive Permitted Junior Securities and payments made from the trust described
under Article 8).

Section 11.03     Default on Designated Senior Debt.

                  The Company may not make any payment or distribution to the
Trustee or any Holder in respect of Obligations with respect to the Notes and
may not acquire from the Trustee or any Holder any Notes for cash or property
(other than (i) securities that are subordinated to at

                                       79

least the same extent as the Notes to (a) Senior Debt and (b) any securities
issued in exchange for Senior Debt and (ii) payments and other distributions
made from any defeasance trust created pursuant to Section 8.01 hereof) until
all principal and other Obligations with respect to the Senior Debt have been
paid in full if:

                  (i) a default in the payment of any principal or other
         Obligations with respect to Designated Senior Debt occurs and is
         continuing; or

                  (ii) a default, other than a payment default, on Designated
         Senior Debt occurs and is continuing that then permits holders of the
         Designated Senior Debt as to which such default relates to accelerate
         its maturity (or that would permit such holders to accelerate with the
         giving of notice or the passage of time or both) and the Trustee
         receives a notice of the default (a "Payment Blockage Notice") from the
         Company or a Representative with respect to such Designated Senior
         Debt. If the Trustee receives any such Payment Blockage Notice, no
         subsequent Payment Blockage Notice shall be effective for purposes of
         this Section unless and until (i) at least 360 days shall have elapsed
         since the effectiveness of the immediately prior Payment Blockage
         Notice and (ii) all scheduled payments of principal, premium and
         Additional Interest, if any, and interest on the Notes that have come
         due have been paid in full in cash. No nonpayment default that existed
         or was continuing on the date of delivery of any Payment Blockage
         Notice to the Trustee shall be, or be made, the basis for a subsequent
         Payment Blockage Notice unless such default shall have been waived or
         cured for a period of not less than 90 days.

                  The Company may and shall resume payments on and distributions
in respect of the Notes and may acquire them upon the earlier of:

                  (i) the date upon which the default is cured or waived, or

                  (ii) in the case of a default referred to in Section 11.03(ii)
         hereof, 179 days pass after the date on which the applicable Payment
         Blockage Notice is received if the maturity of such Designated Senior
         Debt has not been accelerated,

if this Article otherwise permits the payment, distribution or acquisition at
the time of such payment or acquisition.

Section 11.04     Acceleration of Securities.

                  If payment of the Securities is accelerated because of an
Event of Default, the Company shall promptly notify holders of Senior Debt of
the acceleration.

Section 11.05     When Distribution Must Be Paid Over.

                  In the event that the Trustee or any Holder receives any
payment of any Obligations with respect to the Notes at a time when the Trustee
or such Holder, as applicable, has actual knowledge that such payment is
prohibited by Article 11 hereof, such payment shall be held by the Trustee or
such Holder, in trust for the benefit of, and shall be paid forthwith over and
delivered, upon written request, to, the holders of Senior Debt as their
interests may appear

                                       80

or their Representative under the indenture or other agreement (if any) pursuant
to which Senior Debt may have been issued, as their respective interests may
appear, for application to the payment of all Obligations with respect to Senior
Debt remaining unpaid to the extent necessary to pay such Obligations in full in
accordance with their terms, after giving effect to any concurrent payment or
distribution to or for the holders of Senior Debt.

                  With respect to the holders of Senior Debt, the Trustee
undertakes to perform only such obligations on the part of the Trustee as are
specifically set forth in this Article 11, and no implied covenants or
obligations with respect to the holders of Senior Debt shall be read into this
Indenture against the Trustee. The Trustee shall not be deemed to owe any
fiduciary duty to the holders of Senior Debt, and shall not be liable to any
such holders if the Trustee shall pay over or distribute to or on behalf of
Holders or the Company or any other Person money or assets to which any holders
of Senior Debt shall be entitled by virtue of this Article 11, except if such
payment is made as a result of the willful misconduct or negligence of the
Trustee.

Section 11.06     Notice by Company

                  The Company shall promptly notify the Trustee and the Paying
Agent of any facts known to the Company that would cause a payment of any
Obligations with respect to the Notes to violate this Article 11, but failure to
give such notice shall not affect the subordination of the Notes to the Senior
Debt as provided in this Article 11.

                  The Trustee shall be entitled to rely on the delivery to it of
a written notice by a person representing himself to be a holder of Senior Debt
(or a trustee or agent on behalf of such holder) to establish that such notice
has been given by a holder of Senior Debt (or a trustee or agent on behalf of
any such holder). In the event that the Trustee determines in good faith that
further evidence is required with respect to the right of any person as holder
of Senior Debt to participate in any payment or distribution pursuant to this
Article 11, the Trustee may request such person to furnish evidence to the
reasonable satisfaction of the Trustee as to the amount of Senior Debt held by
such person, the extent to which such person is entitled to participate in such
evidence is not furnish, the Trustee may defer any payment which it may be
required to make for the benefit of such person pursuant to the terms of this
Indenture pending judicial determination as to the rights of such person to
receive such payment.

Section 11.07     Subrogation.

                  After all Senior Debt is paid in full in cash and until the
Notes are paid in full, Holders of Notes shall be subrogated (equally and
ratably with all other Indebtedness pari passu with the Notes) to the rights of
holders of Senior Debt to receive distributions applicable to Senior Debt to the
extent that distributions otherwise payable to the Holders of Notes have been
applied to the payment of Senior Debt. A distribution made under this Article 11
to holders of Senior Debt that otherwise would have been made to Holders of
Notes is not, as between the Company and Holders, a payment by the Company on
the Notes.

Section 11.08     Relative Rights.

                  This Article 11 defines the relative rights of Holders of
Notes and holders of Senior Debt. Nothing in this Indenture shall:

                                       81

                  (i) impair, as between the Company and Holders of Notes, the
         obligation of the Company, which is absolute and unconditional, to pay
         principal of and interest on the Notes in accordance with their terms;

                  (ii) affect the relative rights of Holders of Notes and
         creditors of the Company other than their rights in relation to holders
         of Senior Debt; or

                  (iii) prevent the Trustee or any Holder of Notes from
         exercising its available remedies upon a Default or Event of Default,
         subject to the rights of holders and owners of Senior Debt to receive
         distributions and payments otherwise payable to Holders of Notes.

                  If the Company fails because of this Article 11 to pay
principal of or interest on a Note on the due date, the failure is still a
Default or Event of Default.

Section 11.09     Subordination May Not Be Impaired by Company.

                  No right of any holder of Senior Debt to enforce the
subordination of the Indebtedness evidenced by the Notes shall be impaired by
any act or failure to act by the Company or any Holder or by the failure of the
Company or any Holder to comply with this Indenture.

Section 11.10     Distribution or Notice to Representative.

                  Whenever a distribution is to be made or a notice given to
holders of Senior Debt, the distribution may be made and the notice given to
their Representative.

                  Upon any payment or distribution of assets of the Company
referred to in this Article 11, the Trustee and the Holders of Notes shall be
entitled to rely upon any order or decree made by any court of competent
jurisdiction or upon any certificate of such Representative or of the
liquidating trustee or agent or other Person making any distribution to the
Trustee or to the Holders of Notes for the purpose of ascertaining the Persons
entitled to participate in such distribution, the holders of the Senior Debt and
other Indebtedness of the Company, the amount thereof or payable thereon, the
amount or amounts paid or distributed thereon and all other facts pertinent
thereto or to this Article 11.

Section 11.11     Rights of Trustee and Paying Agent.

                  Notwithstanding the provisions of this Article 11 or any other
provision of this Indenture, the Trustee shall not be charged with knowledge of
the existence of any facts that would prohibit the making of any payment or
distribution by the Trustee, and the Trustee and the Paying Agent may continue
to make payments on the Notes, unless the Trustee shall have received at its
Corporate Trust Office at least three Business Days prior to the date of such
payment written notice of facts that would cause the payment of any Obligations
with respect to the Notes to violate this Article 11. Only the Company or a
Representative may give the notice. Nothing in this Article 11 shall impair the
claims of, or payments to, the Trustee under or pursuant to Section 7.07 hereof.

                                       82

                  The Trustee in its individual or any other capacity may hold
Senior Debt with the same rights it would have if it were not Trustee. Any Agent
may do the same with like rights.

Section 11.12     Authorization to Effect Subordination.

                  Each Holder of Notes, by the Holder's acceptance thereof,
authorizes and directs the Trustee on such Holder's behalf to take such action
as may be necessary or appropriate to effectuate the subordination as provided
in this Article 11, and appoints the Trustee to act as such Holder's
attorney-in-fact for any and all such purposes. If the Trustee does not file a
proper proof of claim or proof of debt in the form required in any proceeding
referred to in Section 6.09 hereof at least 30 days before the expiration of the
time to file such claim, the credit agents are hereby authorized to file an
appropriate claim for and on behalf of the Holders of the Notes.

Section 11.13     Amendments.

                  The provisions of this Article 11 shall not be amended or
modified without the written consent of the holders of at least 75% in aggregate
principal amount of the Notes then outstanding if such amendment would adversely
affect the rights of Holders of Notes.

                                   ARTICLE 12.
                                  MISCELLANEOUS

Section 12.01     Trust Indenture Act Controls.

                  If any provision of this Indenture limits, qualifies or
conflicts with the duties imposed by TIA ss. 318(c), the imposed duties shall
control.

Section 12.02     Notices.

                  Any notice or communication by the Company or the Trustee to
the others 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 any Guarantor:

                  L-3 Communications Corporation
                  600 Third Avenue, 34th Floor,
                  New York, New York  10016
                  Attention:  Senior Vice President-Finance (Fax: 212-805-5440)

                  With a copy to:

                  Simpson Thacher & Bartlett LLP
                  425 Lexington Avenue
                  New York, New York  10017
                  Attention:  Vincent Pagano, Jr. (Fax: 212-455-2502)

                                       83

                  If to the Trustee:

                  The Bank of New York
                  101 Barclay Street
                  New York, New York  10286
                  Attention:  Corporate Trust Administration (Fax: 212-815-5704)

                  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, at the time delivered by hand,
if personally delivered; five Business Days after being deposited in the mail,
postage prepaid, if mailed; when receipt acknowledged, if telecopied; and 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 ss. 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.

                  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 12.03     Communications By Holders of Notes with Other Holders of
                  Notes.

                  Holders may communicate pursuant to TIA ss. 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 ss. 312(c).

Section 12.04     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 12.05 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 12.05 hereof) stating

                                       84

         that, in the opinion of such counsel, all such conditions precedent and
         covenants have been satisfied.

Section 12.05     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 ss. 314(a)(4)) shall comply with the provisions of TIA
ss. 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.

Section 12.06     Rule 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 12.07     No Personal Liability of Directors, Officers, Employees and
                  Stockholders.

                  No director, officer, employee, incorporator or stockholder of
the Company or any Subsidiary of the Company, as such, shall have any liability
for any obligations of the Company or any Subsidiary of the Company under the
Notes or the Subsidiary Guarantees and this Indenture or for any claim based on,
in respect of, or by reason of, such obligations or their creation. Each Holder
of Notes by accepting a Note waives and releases all such liability. The waiver
and release are part of the consideration for issuance of the Notes. Such waiver
may not be effective to waive liabilities under the federal securities laws and
it is the view of the SEC that such a waiver is against public policy.

Section 12.08     Governing Law.

                  THIS INDENTURE, THE NOTES AND THE SUBSIDIARY GUARANTEES SHALL
BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW
YORK.

                                       85

Section 12.09     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 in this Indenture and the Notes
shall bind its successors. All agreements of the Trustee in this Indenture shall
bind its successors.

Section 12.11     Severability.

                  In case any provision in this Indenture or in the Notes shall
be invalid, illegal or unenforceable, the validity, legality and enforceability
of the remaining provisions shall not in any way be affected or impaired
thereby.

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.

Section 12.13     Table of Contents, Headings, Etc.

                  The Table of Contents, Cross-Reference Table 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 pages]

                                       86

                                   SIGNATURES

Dated as of December 22, 2003
                                             L-3 COMMUNICATIONS CORPORATION

                                             By:
                                                --------------------------------
                                                Name:
                                                Title:

GUARANTORS:

APCOM, INC.
BROADCAST SPORTS INC.
ELECTRODYNAMICS, INC.
HENSCHEL INC.
HYGIENETICS ENVIRONMENTAL SERVICES, INC.
INTERSTATE ELECTRONICS CORPORATION
KDI PRECISION PRODUCTS, INC.
L-3 COMMUNICATIONS AEROMET, INC.
L-3 COMMUNICATIONS AEROTECH LLC
L-3 COMMUNICATIONS AIS GP CORPORATION
L-3 COMMUNICATIONS ATLANTIC SCIENCE AND TECHNOLOGY CORPORATION
L-3 COMMUNICATIONS AVIONICS SYSTEMS, INC.
L-3 COMMUNICATIONS AYDIN CORPORATION
L-3 COMMUNICATIONS CSI, INC.
L-3 COMMUNICATIONS ESSCO, INC.
L-3 COMMUNICATIONS FLIGHT INTERNATIONAL AVIATION LLC
L-3 COMMUNICATIONS FLIGHT CAPITAL LLC
L-3 COMMUNICATIONS GOVERNMENT SERVICES, INC.
L-3 COMMUNICATIONS ILEX SYSTEMS, INC.
L-3 COMMUNICATIONS IMC CORPORATION
L-3 COMMUNICATIONS INTEGRATED SYSTEMS L.P.
L-3 COMMUNICATIONS INVESTMENTS, INC.
L-3 COMMUNICATIONS KLEIN ASSOCIATES, INC.
L-3 COMMUNICATIONS MAS (US) CORPORATION
L-3 COMMUNICATIONS SECURITY AND DETECTION SYSTEMS CORPORATION CALIFORNIA L-3
COMMUNICATIONS SECURITY AND DETECTION SYSTEMS CORPORATION DELAWARE L-3
COMMUNICATIONS STORM CONTROL SYSTEMS, INC.
L-3 COMMUNICATIONS VECTOR INTERNATIONAL AVIATION LLC
L-3 COMMUNICATIONS TMA CORPORATION
L-3 COMMUNICATIONS WESTWOOD CORPORATION
MCTI ACQUISITION CORPORATION
MICRODYNE COMMUNICATIONS TECHNOLOGIES INCORPORATED
MICRODYNE CORPORATION
MICRODYNE OUTSOURCING INCORPORATED

                                      S-1

MPRI, INC.
PAC ORD INC.
POWER PARAGON, INC.
SHIP ANALYTICS, INC.
SHIP ANALYTICS INTERNATIONAL, INC.
SHIP ANALYTICS USA, INC.
SPD ELECTRICAL SYSTEMS, INC.
SPD SWITCHGEAR INC.
SYCOLEMAN CORPORATION
TROLL TECHNOLOGY CORPORATION
WESCAM AIR OPS INC.
WESCAM AIR OPS LLC
WESCAM HOLDINGS (US) INC.
WESCAM INCORPORATED
WESCAM LLC
WESCAM SONOMA INC.
WOLF COACH, INC.
         as Guarantors

By: ______________________________________
    Name:  Christopher C. Cambria
    Title: Vice President and Secretary

L-3 COMMUNICATIONS INTEGRATED SYSTEMS L.P.
         as Guarantor

By:      L-3 COMMUNICATIONS AIS GP CORPORATION,
         as General Partner

         By: _________________________________
             Name:
             Title: Authorized Person

THE BANK OF NEW YORK,
         as Trustee

By:
   --------------------------------------
   Name:
   Title:

                                      S-2

                                    EXHIBIT A
                                 (Face of Note)

================================================================================

                                                                     CUSIP _____

                    6-1/8% Senior Subordinated Notes due 2014

         No. ___                                                      $_________

                         L-3 COMMUNICATIONS CORPORATION
         promises to pay to
         or registered assigns,
         the principal sum of
         Dollars on January 15, 2014.
         Interest Payment Dates: January 15 and July 15.
         Record Dates:  January 1 and July 1.

                                            Dated:  December 22, 2003

                                            L-3 COMMUNICATIONS CORPORATION

                                            By:
                                               ---------------------------------
                                               Name:
                                               Title:

                                            By:
                                               ---------------------------------
                                               Name:
                                               Title:

This is one of the [Global]
Notes referred to in the
within-mentioned Indenture:

Dated:  December 22, 2003

THE BANK OF NEW YORK,
       as Trustee

By:
   ---------------------------------
   Name:
   Title:

================================================================================

                                      A-1

                                 (Back of Note)

                    6-1/8% Senior Subordinated Notes due 2014

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 2.07 OF THE INDENTURE, (II) THIS GLOBAL NOTE MAY BE
EXCHANGED IN WHOLE BUT NOT IN PART PURSUANT TO SECTION 2.06(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 L-3 COMMUNICATION
CORPORATION.(1)

THE SECURITY (OR ITS PREDECESSOR) EVIDENCED HEREBY WAS ORIGINALLY ISSUED IN A
TRANSACTION EXEMPT FROM REGISTRATION UNDER SECTION 5 OF THE UNITED STATES
SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND THE SECURITY
EVIDENCED HEREBY MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN THE
ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM. EACH
PURCHASER OF THE SECURITY EVIDENCED HEREBY IS HEREBY NOTIFIED THAT THE SELLER
MAY BE RELYING ON THE EXEMPTION FROM THE PROVISION OF SECTION 5 OF THE
SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER. THE HOLDER OF THE SECURITY
EVIDENCED HEREBY AGREES FOR THE BENEFIT OF L-3 COMMUNICATIONS CORPORATION THAT
(A) SUCH SECURITY MAY BE RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (1) (a)
TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL
BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IN A TRANSACTION
MEETING THE REQUIREMENTS OF RULE 144A, (b) IN A TRANSACTION MEETING THE
REQUIREMENTS OF RULE 144 UNDER THE SECURITIES ACT, (c) OUTSIDE THE UNITED STATES
TO A FOREIGN PERSON IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 904 UNDER
THE SECURITIES ACT OR (d) IN ACCORDANCE WITH ANOTHER EXEMPTION FROM THE
REGISTRATION REQUIREMENTS OF THE SECURITIES ACT (AND BASED UPON AN OPINION OF
COUNSEL IF THE COMPANY SO REQUESTS), (2) TO THE COMPANY OR (3) PURSUANT TO AN
EFFECTIVE REGISTRATION STATEMENT, IN EACH CASE, IN ACCORDANCE WITH ANY
APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES OR ANY OTHER
APPLICABLE JURISDICTION AND (B) THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS
REQUIRED TO, NOTIFY ANY PURCHASER FROM IT OF THE SECURITY EVIDENCED HEREBY OF
THE RESALE RESTRICTIONS SET FORTH IN (A) ABOVE.

------------------
(1) This paragraph should be included only if the Note is issued in global form.

                                      A-2

                  Capitalized terms used herein shall have the meanings assigned
to them in the Indenture referred to below unless otherwise indicated.

         1. INTEREST. L-3 Communications Corporation, a Delaware corporation
(the "Company"), promises to pay interest on the principal amount of this Note
at 6-1/8% per annum from December 22, 2003 until maturity and shall pay the
Additional Interest payable pursuant to Section 5 of the Registration Rights
Agreement referred to below. The Company will pay interest and Additional
Interest, if any, semi-annually on January 15 and July 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"), with the same force and effect as if made on the date
for such payment. Interest on the Notes will accrue from the most recent date to
which interest has been paid or, if no interest has been paid, from 1:00 p.m.
December 22, 2003; provided that if there is no existing Default in the payment
of interest, and if this Note is authenticated between a record date referred to
on the face hereof and the next succeeding Interest Payment Date, interest shall
accrue from such next succeeding Interest Payment Date; provided, further, that
the first Interest Payment Date shall be July 15, 2004. The Company shall pay
interest (including post-petition interest in any proceeding under any
Bankruptcy Law) on overdue principal and premium, if any, from time to time on
demand at a rate that is 1% per annum in excess of the rate then in effect; it
shall pay interest (including post-petition interest in any proceeding under any
Bankruptcy Law) on overdue installments of interest and Additional Interest
(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
(except defaulted interest) and Additional Interest, if any, to the Persons who
are registered Holders of Notes at the close of business on the January 1 and
July 1 next (whether or not a Business Day) preceding the Interest Payment Date,
even if such Notes are canceled after such record date and on or before such
Interest Payment Date, except as provided in Section 2.12 of the Indenture with
respect to defaulted interest. The Notes will be payable as to principal,
premium and Additional Interest, if any, and interest at the office or agency of
the Company maintained for such purpose within The City and State of New York,
or, at the option of the Company, payment of interest and Additional Interest
may be made by check mailed to the Holders at their addresses set forth in the
register of Holders; provided that payment by wire transfer of immediately
available funds will be required with respect to principal of and interest,
premium and Additional Interest on, all Global Notes and all other Notes the
Holders of which shall have provided wire transfer instructions to the Company
or the Paying Agent if such Holders shall be registered Holders of at least
$250,000 in principal amount of the 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, The Bank of New York, 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.

         4. INDENTURE. The Company issued the Notes under an Indenture dated as
of December 22, 2003 ("Indenture") among the Company, the Guarantors named
therein and the

                                      A-3

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 ss.ss. 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. To the extent any provision of this Note
conflicts with the express provisions of the Indenture, the provisions of the
Indenture shall govern and be controlling.

         5.       OPTIONAL REDEMPTION.

                  (a) Except as set forth in clause (b) of this paragraph 5, the
Notes shall not be redeemable at the Company's option prior to January 15, 2009.
Thereafter, the Notes shall be subject to redemption at any time at the option
of the Company, in whole or in part, upon not less than 30 nor more than 60
days' notice, at the redemption prices (expressed as percentages of principal
amount) set forth below plus accrued and unpaid interest and Additional Interest
thereon, if any, to the applicable redemption date, if redeemed during the
twelve-month period beginning on January 15 of the years indicated below:

                  YEAR                                       PERCENTAGE
                  2009.....................................   103.063%
                  2010.....................................   102.042%
                  2011.....................................   101.021%
                  2012 and thereafter......................   100.000%

                  (b) Notwithstanding the foregoing, before January 15, 2007,
the Company may on any one or more occasions redeem up to an aggregate of 35% of
the Notes originally issued at a redemption price of 106.125% of the principal
amount thereof, plus accrued and unpaid interest and Additional Interest
thereon, if any, to the redemption date, with the net cash proceeds of one or
more Equity Offerings by the Company or the net cash proceeds of one or more
Equity Offerings by Holdings that are contributed to the Company as common
equity capital; provided that at least 65% of the Notes originally issued remain
outstanding immediately after the occurrence of each such redemption; and
provided, further, that any such redemption must occur within 120 days of the
date of the closing of such Equity Offering.

         6.       MANDATORY REDEMPTION.

                  Except as set forth in paragraph 7 below, the Company shall
not be required to make mandatory redemption payments with respect to the Notes.

         7.       REPURCHASE AT OPTION OF HOLDER.

                  (a) If there is a Change of Control, the Company shall be
required to make an offer (a "Change of Control Offer") to repurchase all or any
part (equal to $1,000 or an integral multiple thereof) of each Holder's Notes at
a purchase price equal to 101% of aggregate principal amount thereof plus
accrued and unpaid interest, if any, to the date of purchase (the "Change of
Control Payment"). Within 10 days following any Change of Control, the Company
shall mail a notice to each Holder setting forth the procedures governing the
Change of Control Offer as required by the Indenture.

                                      A-4

                  (b) If the Company or a Subsidiary consummates any Asset
Sales, within five Business Days of each date on which the aggregate amount of
Excess Proceeds exceeds $10.0 million, the Company will be required to make an
offer to all Holders of the Notes (an "Asset Sale Offer") and any other
Indebtedness that ranks pari passu with the Notes (including the December 1998
Notes, the 2002 Notes and the May 2003 Notes) that, by its terms, requires the
Company to offer to repurchase such Indebtedness with such Excess Proceeds to
purchase the maximum principal amount of Notes and pari passu Indebtedness that
may be purchased out of such Excess Proceeds at an offer price in cash in an
amount equal to 100% of the principal amount thereof plus accrued and unpaid
interest thereon, if any, to the date of purchase, in accordance with the
procedures set forth in the Indenture. To the extent that the aggregate amount
of Notes or pari passu Indebtedness tendered pursuant to an Asset Sale Offer is
less than the Excess Proceeds, the Company may use any Excess Proceeds for
general corporate purposes. If the aggregate principal amount of Notes or pari
passu Indebtedness surrendered by Holders thereof exceeds the amount of Excess
Proceeds in an Asset Sale Offer, the Company shall repurchase such Indebtedness
on a pro rata basis and the Trustee shall select the Notes to be purchased on a
pro rata basis. Holders of Notes that are the subject of an offer to purchase
will receive an Asset Sale Offer from the Company prior to any related purchase
date and may elect to have such Notes purchased by completing the form entitled
"Option of Holder to Elect Purchase" on the reverse of the Notes.

         8. NOTICE OF REDEMPTION. Notice of redemption will be mailed 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 whole 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.

         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 a 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 or the Notes may be amended or supplemented with the consent of
the Holders of at least a majority in principal amount of the then outstanding
Notes, and any existing default or compliance with any provision of the
Indenture or the Notes may be waived with the consent of the Holders of a
majority in principal amount of the then outstanding Notes. Without the consent
of any Holder of a Note, the Indenture or the Notes may be amended or
supplemented to cure

                                      A-5

any ambiguity, defect or inconsistency, to provide for uncertificated Notes in
addition to or in place of certificated Notes, to provide for the assumption of
the Company's obligations to Holders of the Notes in case of a merger or
consolidation, 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 legal
rights under the Indenture of any such Holder, or to comply with the
requirements of the SEC in order to effect or maintain the qualification of the
Indenture under the Trust Indenture Act.

         12. DEFAULTS AND REMEDIES. An "Event of Default" occurs if: (i) default
for 30 days in the payment when due of interest on, or Additional Interest with
respect to, the Notes (whether or not prohibited by the subordination provisions
of the Indenture); (ii) default in payment when due of the principal of or
premium, if any, on the Notes (whether or not prohibited by the subordination
provisions of the Indenture); (iii) failure by the Company to comply with the
covenants contained in sections 4.10, 4.15 or 5.01 of the Indenture; (iv)
failure by the Company for 60 days after notice to comply with any of its other
agreements in the Indenture or the Notes; (v) default under any mortgage,
indenture or instrument under which there may be issued or by which there may be
secured or evidenced any Indebtedness for money borrowed by the Company or any
of its Restricted Subsidiaries (or the payment of which is guaranteed by the
Company or any of its Restricted Subsidiaries) whether such Indebtedness or
guarantee now exists, or is created after the date of the Indenture, which
default results in the acceleration of such Indebtedness prior to its express
maturity and, in each case, the principal amount of any such Indebtedness,
together with the principal amount of any other such Indebtedness the maturity
of which has been so accelerated, aggregates $25.0 million or more; (vi) failure
by the Company or any of its Restricted Subsidiaries to pay final judgments
aggregating in excess of $25.0 million, which judgments are not paid, discharged
or stayed for a period of 60 days; (vii) certain events of bankruptcy or
insolvency with respect to the Company or any of its Significant Subsidiaries or
any group of Subsidiaries that, taken as a whole, would constitute a Significant
Subsidiary; and (viii) except as permitted by the Indenture, any Subsidiary
Guarantee shall be held in any judicial proceeding to be unenforceable or
invalid.

         If any Event of Default occurs and is continuing, the Trustee or the
Holders of at least 25% in principal amount of the then outstanding Notes may
declare all the Notes to be due and payable immediately; provided, however, that
so long as any Designated Senior Debt is outstanding, such declaration shall not
become effective until the earlier of (i) the day which is five Business Days
after receipt by the Representatives of Designated Senior Debt of such notice of
acceleration or (ii) the date of acceleration of any Designated Senior Debt.
Notwithstanding the foregoing, in the case of an Event of Default arising from
certain events of bankruptcy or insolvency, with respect to the Company or any
Significant Subsidiary or any group of Subsidiaries that, taken as a whole,
would constitute a Significant Subsidiary, all outstanding Notes will become due
and payable without further action or notice. Holders of the Notes may not
enforce the Indenture or the Notes except as provided in the Indenture. Subject
to certain limitations, Holders of a majority in principal amount of the then
outstanding Notes may direct the Trustee in its exercise of any trust or power.
The Trustee may withhold from Holders of the Notes notice of any continuing
Default or Event of Default (except a Default or Event of Default relating to
the payment of principal or interest) if it determines that withholding notice
is in their interest.

                                      A-6

         In the case of any Event of Default occurring by reason of any willful
action (or inaction) taken (or not taken) by or on behalf of the Company with
the intention of avoiding payment of the premium that the Company would have had
to pay if the Company then had elected to redeem the Notes pursuant to the
optional redemption provisions of the Indenture, an equivalent premium shall
also become and be immediately due and payable to the extent permitted by law
upon the acceleration of the Notes. If an Event of Default occurs prior to
January 15, 2009 by reason of any willful action (or inaction) taken (or not
taken) by or on behalf of the Company with the intention of avoiding the
prohibition on redemption of the Notes prior to January 15, 2009 then the
premium specified in the Indenture shall also become immediately due and payable
to the extent permitted by law upon the acceleration of the Notes.

         The Holders of a majority in aggregate principal amount of the Notes
then outstanding by notice to the Trustee may on behalf of the Holders of all of
the Notes waive any existing Default or Event of Default and its consequences
under the Indenture except a continuing Default or Event of Default in the
payment of interest on, or the principal of, the Notes.

         13. SUBORDINATION. Payment of the principal of, premium and Additional
Interest, if any, or interest on the Notes is subordinated to the prior payment
of Senior Debt on the terms provided in the Indenture.

         14. 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.

         15. NO RECOURSE AGAINST OTHERS. A director, officer, employee,
incorporator or stockholder, of the Company or any Subsidiary of the Company, as
such, shall not have any liability for any obligations of the Company or any
Subsidiary of the Company under the Notes, the Indenture or the Subsidiary
Guarantees or for any claim based on, in respect of, or by reason of, such
obligations or their creation. Each Holder by accepting a Note waives and
releases all such liability. The waiver and release are part of the
consideration for the issuance of the Notes.

         16. AUTHENTICATION. This Note shall not be valid until authenticated by
the manual signature of the Trustee or an authenticating agent.

         17. 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).

         18. ADDITIONAL RIGHTS OF HOLDERS OF TRANSFER RESTRICTED SECURITIES. In
addition to the rights provided to Holders of Notes under the Indenture, Holders
of Transferred Restricted Securities shall have all the rights set forth in the
Registration Rights Agreement dated as of December 22, 2003, between the Company
and the parties named on the signature pages thereof, or, with respect to any
Additional Notes, Holders of Transfer Restricted Securities shall have all the
rights set forth in one or more registration rights agreements between the
Company

                                      A-7

and the other parties thereto, relating to rights given by the Company to the
purchasers of Additional Notes (collectively, the "Registration Rights
Agreement").

         19. 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.

         20. GOVERNING LAW. This Note shall be governed by, and construed in
accordance with, the laws of the State of New York.

         The Company will furnish to any Holder upon written request and without
charge a copy of the Indenture and/or the Registration Rights Agreement.
Requests may be made to:

                    L-3 Communications Corporation
                    600 Third Avenue, 34th Floor,
                    New York, New York  10016
                    Attention: Senior Vice President-Finance (Fax: 212-805-5440)

                                      A-8

                                 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 him.

Date: _____________________

                                        Your Signature:_________________________
                                        (Sign exactly as your name appears on
                                        the face of this Note)

Signature Guarantee.

                                      A-9

                       Option of Holder to Elect Purchase

         If you want to elect to have this Note purchased by the Company
pursuant to Section 4.10 or 4.15 of the Indenture, check the box below:

           Section 4.10                      Section 4.15

         If you want to elect to have only part of the Note purchased by the
Company pursuant to Section 4.10 or Section 4.15 of the Indenture, state the
amount you elect to have purchased: $______________

Date:__________________________         Your Signature:_________________________
                                        (Sign exactly as your name appears on
                                        the Note)

                                        Tax Identification No.:_________________

Signature Guarantee.

                                      A-10

              Schedule of Exchanges of Interests in the Global Note

         The following exchanges of a part of this Global Note for an interest
in another Global Note or for a Definitive Note, or exchanges of a part of
another Global Note or Definitive Note for an interest in this Global Note, have
been made:

                                                                       Principal Amount of
                                                                        this Global Note         Signature of
                        Amount of decrease    Amount of increase in      following such       authorized officer
                        in Principal Amount    Principal Amount of          decrease          of Trustee or Note
 Date of Exchange       of this Global Note      this Global Note         (or increase)            Custodian
------------------     --------------------   ---------------------    -------------------    ------------------

                                      A-11

                                    EXHIBIT B
                         FORM OF CERTIFICATE OF TRANSFER

L-3 Communications Corporation
600 Third Avenue, 34th Floor,
New York, New York  10016

[Registrar address block]

         Re:  6-1/8% Senior Subordinated Notes due 2014.

         Reference is hereby made to the Indenture, dated as of December 22,
2003 (the "Indenture"), among L-3 Communications Corporation, as issuer (the
"Company"), the Guarantors party thereto and The Bank of New York, 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 BOOK-ENTRY INTERESTS IN THE
144A GLOBAL NOTE OR DEFINITIVE NOTES 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 Book-Entry
Interests or Definitive Notes are being transferred to a Person that the
Transferor reasonably believes is purchasing the Book-Entry Interests or
Definitive Notes 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 Book-Entry 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 BOOK-ENTRY INTERESTS IN THE
TEMPORARY REGULATION S GLOBAL NOTE, THE REGULATION S GLOBAL NOTE OR DEFINITIVE
NOTES 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 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

                                      B-1

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 and (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 Restricted 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). Upon consummation of the proposed transfer in accordance
with the terms of the Indenture, the transferred Book-Entry 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 BOOK-ENTRY
INTERESTS IN THE IAI GLOBAL NOTE OR DEFINITIVE NOTES 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
Book-Entry Interests in Restricted Global Notes and Definitive Notes bearing the
Private Placement Legend 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;

                                       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 the Transfer complies with the transfer
restrictions applicable to Book-Entry Interests in a Restricted Global Note or
Definitive Notes bearing the Private Placement Legend and the requirements of
the exemption claimed, which certification is supported by (x) if such Transfer
is in respect of a principal amount of Notes at the time of Transfer of $250,000
or more, a certificate executed by the Transferee in the form of Exhibit D to
the Indenture, or (y) if such Transfer is in respect of a principal amount of
Notes at the time of transfer of less than $250,000, (1) a certificate executed
by the Transferee in the form of Exhibit D to the Indenture and (2) an Opinion
of Counsel provided by the Transferor or the Transferee (a copy of which the
Transferor has attached to this certification), to the effect that (1) such
Transfer is in compliance with the Securities Act and (2) such Transfer complies
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 Book-Entry Interest or Definitive Note will be
subject to the restrictions on transfer enumerated in the Private Placement
Legend printed on the IAI Global Note and/or the Definitive Notes and in the
Indenture and the Securities Act.

                                      B-2

4. [ ] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF BOOK-ENTRY INTERESTS IN THE
UNRESTRICTED GLOBAL NOTE OR IN DEFINITIVE NOTES THAT DO NOT BEAR THE PRIVATE
PLACEMENT LEGEND.

         (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 Book-Entry Interests or Definitive
Notes will no longer be subject to the restrictions on transfer enumerated in
the Private Placement Legend printed on the Restricted Global Notes, on
Definitive Notes bearing the Private Placement Legend and in the Indenture.

         (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 Book-Entry
Interests or Definitive Notes will no longer be subject to the restrictions on
transfer enumerated in the Private Placement Legend printed on the Restricted
Global Notes, on Definitive Notes bearing the Private Placement Legend and in
the Indenture.

         (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 Book-Entry
Interests or Definitive Notes will not be subject to the restrictions on
transfer enumerated in the Private Placement Legend printed on the Restricted
Global Notes or Definitive Notes bearing the Private Placement Legend and in the
Indenture.

         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-3

                       ANNEX A TO CERTIFICATE OF TRANSFER

1.   The Transferor owns and proposes to transfer the following:

                            [CHECK ONE OF (A) OR (B)]

     (a)  [ ] Book-Entry Interests in the:

          (i)  [ ] 144A Global Note (CUSIP _______), or

          (ii) [ ] Regulation S Global Note (CUSIP ______), or

          (iii) [ ] IAI Global Note (CUSIP ________); or

     (b)  Restricted Definitive Notes.

2.       After the Transfer the Transferee will hold:

                                   [CHECK ONE]

     (a)  [ ] Book-Entry Interests in the:

          (i)  [ ] 144A Global Note (CUSIP _____), or

          (ii) [ ] Regulation S Global Note (CUSIP _____), or

          (iii) [ ] IAI Global Note (CUSIP ______); or

          (iv) [ ] Unrestricted Global Note (CUSIP ______); or

     (b)  [ ] Restricted Definitive Notes; or

     (c)  [ ] Definitive Notes that do not bear the Private Placement Legend,

                  in accordance with the terms of the Indenture.

                                      B-4

                                    EXHIBIT C

                         FORM OF CERTIFICATE OF EXCHANGE

L-3 Communications Corporation
600 Third Avenue, 34th Floor,
New York, New York 10016
Attention:  Senior Vice President-Finance (Fax: 212-805-5440)

         Re:  6-1/8% Senior Subordinated Notes due 2014

                             (CUSIP [____________])

                  Reference is hereby made to the Indenture, dated as of
December 22, 2003 (the "Indenture"), among L-3 Communications Corporation, as
issuer (the "Company"), the Guarantors party thereto and The Bank of New York,
as trustee. Capitalized terms used but not defined herein shall have the
meanings given to them in the Indenture.

                  ______________, (the "Holder") 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 Holder hereby certifies that:

1. EXCHANGE OF RESTRICTED DEFINITIVE NOTES OR RESTRICTED BOOK-ENTRY INTERESTS
FOR DEFINITIVE NOTES THAT DO NOT BEAR THE PRIVATE PLACEMENT LEGEND OR
UNRESTRICTED BOOK-ENTRY INTERESTS

         (a) [ ] CHECK IF EXCHANGE IS FROM RESTRICTED BOOK-ENTRY INTEREST TO
UNRESTRICTED BOOK-ENTRY INTEREST. In connection with the Exchange of the
Holder's Restricted Book-Entry Interest for Unrestricted Book-Entry Interests in
an equal principal amount, the Holder hereby certifies (i) the Unrestricted
Book-Entry Interests are being acquired for the Holder's own account without
transfer, (ii) such Exchange has been effected in compliance with the transfer
restrictions applicable to the 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 Unrestricted Book-Entry Interests are being
acquired in compliance with any applicable blue sky securities laws of any state
of the United States.

         (b) [ ] CHECK IF EXCHANGE IS FROM RESTRICTED BOOK-ENTRY INTEREST TO
DEFINITIVE NOTES THAT DO NOT BEAR THE PRIVATE PLACEMENT LEGEND. In connection
with the Exchange of the Holder's Restricted Book-Entry Interests for Definitive
Notes that do not bear the Private Placement Legend, the Holder hereby certifies
(i) the Definitive Notes are being acquired for the Holder'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

                                      C-1

Securities Act and (iv) the Definitive Notes are 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 NOTES TO
UNRESTRICTED BOOK-ENTRY INTERESTS. In connection with the Holder's Exchange of
Restricted Definitive Notes for Unrestricted Book-Entry Interests, (i) the
Unrestricted Book-Entry Interests are being acquired for the Holder'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 Book-Entry Interests are 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 NOTES TO
DEFINITIVE NOTES THAT DO NOT BEAR THE PRIVATE PLACEMENT LEGEND. In connection
with the Holder's Exchange of a Restricted Definitive Note for Definitive Notes
that do not bear the Private Placement Legend, the Holder hereby certifies (i)
the Definitive Notes that do not bear the Private Placement Legend are being
acquired for the Holder'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 Notes are 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 RESTRICTED BOOK-ENTRY INTERESTS
FOR RESTRICTED DEFINITIVE NOTES OR RESTRICTED BOOK-ENTRY INTERESTS

         (a) [ ] CHECK IF EXCHANGE IS FROM RESTRICTED BOOK-ENTRY INTERESTS TO
RESTRICTED DEFINITIVE NOTE. In connection with the Exchange of the Holder's
Restricted Book-Entry Interest for Restricted Definitive Notes with an equal
principal amount, (i) the Restricted Definitive Notes are being acquired for the
Holder'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 Notes issued will be subject
to the restrictions on transfer enumerated in the Private Placement Legend
printed on the Restricted Definitive Notes and in the Indenture and the
Securities Act.

         (b)[ ] CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE NOTES TO
RESTRICTED BOOK-ENTRY INTERESTS. In connection with the Exchange of the Holder's
Restricted Definitive Note for Restricted Book-Entry Interests in the [CHECK
ONE] 144A Global Note, Regulation S Global Note, IAI Global Note with an equal
principal amount, (i) the Definitive Notes are being acquired for the Holder's
own account without transfer and (ii) such Exchange has been effected in
compliance with the transfer restrictions applicable to the Restricted
Definitive Note 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

                                       C-2

consummation of the proposed Exchange in accordance with the
terms of the Indenture, the Book-Entry Interests 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.

         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-3

                                    EXHIBIT D

                            FORM OF CERTIFICATE FROM
                   ACQUIRING INSTITUTIONAL ACCREDITED INVESTOR

L-3 Communications Corporation
600 Third Avenue, 34th Floor,
New York, New York  10016
Attention:  Senior Vice President-Finance (Fax: 212-805-5440)

      Re:  6-1/8% Senior Subordinated Notes due 2014

         Reference is hereby made to the Indenture, dated as of December 22,
2003 (the "Indenture"), among L-3 Communications Corporation, as issuer (the
"Company"), the Guarantors party thereto and The Bank of New York, 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 at maturity of:

         (a) [ ] Book-Entry Interests, or

         (b) [ ] Definitive Notes,

         we confirm that:

         1. We understand that any subsequent transfer of the Notes or any
interest therein is subject to certain restrictions and conditions set forth in
the Indenture and the undersigned agrees to be bound by, and not to resell,
pledge or otherwise transfer the Notes or any interest therein except in
compliance with, such restrictions and conditions and the United States
Securities Act of 1933, as amended (the "Securities Act").

         2. We understand that the offer and sale of the Notes have not been
registered under the Securities Act, and that the Notes and any interest therein
may not be offered or sold except as permitted in the following sentence. We
agree, on our own behalf and on behalf of any accounts for which we are acting
as hereinafter stated, that if we should sell the Notes or any interest therein,
we will do so only (A) to the Company or any subsidiary thereof, (B) in
accordance with Rule 144A under the Securities Act to a "qualified institutional
buyer" (as defined therein), (C) to an institutional "accredited investor" (as
defined below) that, prior to such transfer, furnishes (or has furnished on its
behalf by a U.S. broker-dealer) to you and to the Company a signed letter
substantially in the form of this letter and, 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 in form reasonably acceptable to the Company to the effect
that such transfer is in compliance with the Securities Act, (D) outside the
United States in accordance with Rule 904 of Regulation S under the Securities
Act, (E) pursuant to the provisions of Rule 144 under the Securities Act or (F)
pursuant to an effective registration statement under the Securities Act, and we
further agree to provide to any person purchasing the Definitive Notes or
Book-Entry

                                      D-1

Interests from us in a transaction meeting the requirements of
clauses (A) through (E) of this paragraph a notice advising such purchaser that
resales thereof are restricted as stated herein.

         3. We understand that, on any proposed resale of the Notes or
Book-Entry Interests, we will be required to furnish to you and the Company such
certifications, legal opinions and other information as you and the Company may
reasonably require to confirm that the proposed sale complies with the foregoing
restrictions. We further understand that the Notes purchased by us will bear a
legend to the foregoing effect. We further understand that any subsequent
transfer by us of the Notes or Book-Entry Interests therein acquired by us must
be effected through one of the Placement Agents.

         4. We are an institutional "accredited investor" (as defined in Rule
501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act) and have
such knowledge and experience in financial and business matters as to be capable
of evaluating the merits and risks of our investment in the Notes, and we and
any accounts for which we are acting are each able to bear the economic risk of
our or its investment.

         5. We are acquiring the Notes or Book-Entry Interests purchased by us
for our own account or for one or more accounts (each of which is an
institutional "accredited investor") as to each of which we exercise sole
investment discretion.

         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.

                                            ------------------------------------
                                            [Insert Name of Accredited Investor]

                                            By:
                                                --------------------------------
                                                Name:
                                                Title:

Dated:  ____________, ____

                                      D-2

                                    EXHIBIT E

                 FORM OF SUPPLEMENTAL INDENTURE TO BE DELIVERED
                           BY GUARANTEEING SUBSIDIARY

         SUPPLEMENTAL INDENTURE (this "Supplemental Indenture"), dated as of
_________________, among ____________________ (the "Guaranteeing Subsidiaries"),
each a direct or indirect subsidiary of L-3 Communications Corporation (or its
permitted successor), a Delaware corporation (the "Company"), the Company and
The Bank of New York, as trustee under the indenture referred to below (the
"Trustee").

                                   WITNESSETH

         WHEREAS, the Company has heretofore executed and delivered to the
Trustee an indenture (the "Indenture"), dated as of December 22, 2003 providing
for the issuance of an unlimited amount of 6-1/8% Senior Subordinated Notes due
2014 (the "Notes");

         WHEREAS, the Indenture provides that under certain circumstances the
Guaranteeing Subsidiaries shall execute and deliver to the Trustee a
supplemental indenture pursuant to which the Guaranteeing Subsidiaries shall
unconditionally guarantee all of the Company's Obligations (as defined in the
Indenture) under the Notes and the Indenture on the terms and conditions set
forth herein (the "Subsidiary Guarantee"); and

         WHEREAS, pursuant to Section 9.01 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 Subsidiaries 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. Each Guaranteeing Subsidiary hereby agrees
as follows:

             (a)  Such Guaranteeing Subsidiary, jointly and severally with all
                  other current and future guarantors of the Notes
                  (collectively, the "Guarantors" and each, a "Guarantor"),
                  unconditionally guarantees to each Holder of a Note
                  authenticated and delivered by the Trustee and to the Trustee
                  and its successors and assigns, regardless of the validity and
                  enforceability of the Indenture, the Notes or the Obligations
                  of the Company under the Indenture or the Notes, that:

                  (i)    the principal of, premium, interest and Additional
                         Interest, if any, on the Notes will be promptly paid
                         in full when due, whether at maturity, by
                         acceleration, redemption or otherwise, and interest on

                                      E-1

                         the overdue principal of, premium, interest and
                         Additional Interest, if any, on the Notes, to the
                         extent lawful, and all other Obligations of the
                         Company to the Holders or the Trustee thereunder or
                         under the Indenture will be promptly paid in full,
                         all in accordance with the terms thereof; and

                  (ii)   in case of any extension of time for payment or renewal
                         of any Notes or any of such other Obligations, that the
                         same will be promptly paid in full when due in
                         accordance with the terms of the extension or renewal,
                         whether at stated maturity, by acceleration or
                         otherwise.

             (b)  Notwithstanding the foregoing, in the event that this
                  Subsidiary Guarantee would constitute or result in a violation
                  of any applicable fraudulent conveyance or similar law of any
                  relevant jurisdiction, the liability of such Guaranteeing
                  Subsidiary under this Supplemental Indenture and its
                  Subsidiary Guarantee shall be reduced to the maximum amount
                  permissible under such fraudulent conveyance or similar law.

         3. EXECUTION AND DELIVERY OF SUBSIDIARY GUARANTEES.

             (a)  To evidence its Subsidiary Guarantee set forth in this
                  Supplemental Indenture, such Guaranteeing Subsidiary hereby
                  agrees that a notation of such Subsidiary Guarantee
                  substantially in the form of Exhibit F to the Indenture shall
                  be endorsed by an officer of such Guaranteeing Subsidiary on
                  each Note authenticated and delivered by the Trustee after the
                  date hereof.

             (b)  Notwithstanding the foregoing, such Guaranteeing Subsidiary
                  hereby agrees that its Subsidiary Guarantee set forth herein
                  shall remain in full force and effect notwithstanding any
                  failure to endorse on each Note a notation of such Subsidiary
                  Guarantee.

             (c)  If an Officer whose signature is on this Supplemental
                  Indenture or on the Subsidiary Guarantee no longer holds that
                  office at the time the Trustee authenticates the Note on which
                  a Subsidiary Guarantee is endorsed, the Subsidiary Guarantee
                  shall be valid nevertheless.

             (d)  The delivery of any Note by the Trustee, after the
                  authentication thereof under the Indenture, shall constitute
                  due delivery of the Subsidiary Guarantee set forth in this
                  Supplemental Indenture on behalf of each Guaranteeing
                  Subsidiary.

             (e)  Each Guaranteeing Subsidiary hereby agrees that its
                  Obligations hereunder shall be unconditional, regardless of
                  the validity, regularity or enforceability of the Notes or the
                  Indenture, the absence of any action to enforce the same, any
                  waiver or consent by any Holder of the Notes with respect to
                  any provisions hereof or thereof, the recovery of any judgment

                                      E-2

                  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.

             (f)  Each Guaranteeing Subsidiary hereby waives diligence,
                  presentment, demand of payment, filing of claims with a court
                  in the event of insolvency or bankruptcy of the Company, any
                  right to require a proceeding first against the Company,
                  protest, notice and all demands whatsoever and covenants that
                  its Subsidiary Guarantee made pursuant to this Supplemental
                  Indenture will not be discharged except by complete
                  performance of the Obligations contained in the Notes and the
                  Indenture.

             (g)  If any Holder or the Trustee is required by any court or
                  otherwise to return to the Company or any Guaranteeing
                  Subsidiary, or any custodian, Trustee, liquidator or other
                  similar official acting in relation to either the Company or
                  such Guaranteeing Subsidiary, any amount paid by either to the
                  Trustee or such Holder, the Subsidiary Guarantee made pursuant
                  to this Supplemental Indenture, to the extent theretofore
                  discharged, shall be reinstated in full force and effect.

             (h)  Each Guaranteeing Subsidiary agrees that it shall not be
                  entitled to any right of subrogation in relation to the
                  Holders in respect of any Obligations guaranteed hereby until
                  payment in full of all Obligations guaranteed hereby. Each
                  Guaranteeing Subsidiary further agrees that, as between such
                  Guaranteeing Subsidiary, on the one hand, and the Holders and
                  the Trustee, on the other hand:

                  (i)    the maturity of the Obligations guaranteed hereby may
                         be accelerated as provided in Article 6 of the
                         Indenture for the purposes of the Subsidiary Guarantee
                         made pursuant to this Supplemental Indenture,
                         notwithstanding any stay, injunction or other
                         prohibition preventing such acceleration in respect of
                         the Obligations guaranteed hereby; and

                  (ii)   in the event of any declaration of acceleration of such
                         Obligations as provided in Article 6 of the Indenture,
                         such Obligations (whether or not due and payable) shall
                         forthwith become due and payable by such Guaranteeing
                         Subsidiary for the purpose of the Subsidiary Guarantee
                         made pursuant to this Supplemental Indenture.

             (i)  Each Guaranteeing Subsidiary shall have the right to seek
                  contribution from any other non-paying Guaranteeing Subsidiary
                  so long as the exercise of such right does not impair the
                  rights of the Holders or the Trustee under the Subsidiary
                  Guarantee made pursuant to this Supplemental Indenture.

                                      E-3

         4.  GUARANTEEING SUBSIDIARY MAY CONSOLIDATE, ETC. ON CERTAIN TERMS.

             (a)  Except as set forth in Articles 4 and 5 of the Indenture,
                  nothing contained in the Indenture, this Supplemental
                  Indenture or in the Notes shall prevent any consolidation or
                  merger of any Guaranteeing Subsidiary with or into the Company
                  or any other Guarantor or shall prevent any transfer, sale or
                  conveyance of the property of any Guaranteeing Subsidiary as
                  an entirety or substantially as an entirety, to the Company or
                  any other Guarantor.

             (b)  Except as set forth in Articles 4 and 5 of the Indenture,
                  nothing contained in the Indenture, this Supplemental
                  Indenture or in the Notes shall prevent any consolidation or
                  merger of any Guaranteeing Subsidiary with or into a
                  corporation or corporations other than the Company or any
                  other Guarantor (in each case, whether or not affiliated with
                  the Guaranteeing Subsidiary), or successive consolidations or
                  mergers in which a Guaranteeing Subsidiary or its successor or
                  successors shall be a party or parties, or shall prevent any
                  sale or conveyance of the property of any Guaranteeing
                  Subsidiary as an entirety or substantially as an entirety, to
                  a corporation other than the Company or any other Guarantor
                  (in each case, whether or not affiliated with the Guaranteeing
                  Subsidiary) authorized to acquire and operate the same;
                  provided, however, that each Guaranteeing Subsidiary hereby
                  covenants and agrees that (i) subject to the Indenture, upon
                  any such consolidation, merger, sale or conveyance, the due
                  and punctual performance and observance of all of the
                  covenants and conditions of the Indenture and this
                  Supplemental Indenture to be performed by such Guaranteeing
                  Subsidiaries, shall be expressly assumed (in the event that
                  such Guaranteeing Subsidiary is not the surviving corporation
                  in the merger), by supplemental indenture satisfactory in form
                  to the Trustee, executed and delivered to the Trustee, by the
                  corporation formed by such consolidation, or into which such
                  Guaranteeing Subsidiary shall have been merged, or by the
                  corporation which shall have acquired such property and (ii)
                  immediately after giving effect to such consolidation, merger,
                  sale or conveyance no Default or Event of Default exists.

             (c)  In case of any such consolidation, merger, sale or conveyance
                  and upon the assumption by the successor corporation, by
                  supplemental indenture, executed and delivered to the Trustee
                  and satisfactory in form to the Trustee, of the Subsidiary
                  Guarantee made pursuant to this Supplemental Indenture and the
                  due and punctual performance of all of the covenants and
                  conditions of the Indenture and this Supplemental Indenture to
                  be performed by such Guaranteeing Subsidiary, such successor
                  corporation shall succeed to and be substituted for such
                  Guaranteeing Subsidiary with the same effect as if it had been
                  named herein as the Guaranteeing Subsidiary. Such successor
                  corporation thereupon may cause to be signed any or all of the
                  Subsidiary Guarantees to be endorsed upon the Notes issuable
                  under the Indenture which theretofore shall not have been
                  signed

                                      E-4

                  by the Company and delivered to the Trustee. All the
                  Subsidiary Guarantees so issued shall in all respects have the
                  same legal rank and benefit under the Indenture and this
                  Supplemental Indenture as the Subsidiary Guarantees
                  theretofore and thereafter issued in accordance with the terms
                  of the Indenture and this Supplemental Indenture as though all
                  of such Subsidiary Guarantees had been issued at the date of
                  the execution hereof.

        5.   RELEASES.

             (a)  Concurrently with any sale of assets (including, if
                  applicable, all of the Capital Stock of a Guaranteeing
                  Subsidiary), all Liens, if any, in favor of the Trustee in the
                  assets sold thereby shall be released; provided that in the
                  event of an Asset Sale, the Net Proceeds from such sale or
                  other disposition are treated in accordance with the
                  provisions of Section 4.10 of the Indenture. If the assets
                  sold in such sale or other disposition include all or
                  substantially all of the assets of a Guaranteeing Subsidiary
                  or all of the Capital Stock of a Guaranteeing Subsidiary, then
                  the Guaranteeing Subsidiary (in the event of a sale or other
                  disposition of all of the Capital Stock of such Guaranteeing
                  Subsidiary) or the Person acquiring the property (in the event
                  of a sale or other disposition of all or substantially all of
                  the assets of such Guaranteeing Subsidiary) shall be released
                  from and relieved of its Obligations under this Supplemental
                  Indenture and its Subsidiary Guarantee made pursuant hereto;
                  provided that in the event of an Asset Sale, the Net Proceeds
                  from such sale or other disposition are treated in accordance
                  with the provisions of Section 4.10 of the Indenture. Upon
                  delivery by the Company to the Trustee of an Officers'
                  Certificate to the effect that such sale or other disposition
                  was made by the Company or the Guaranteeing Subsidiary, as the
                  case may be, in accordance with the provisions of the
                  Indenture and this Supplemental Indenture, including without
                  limitation, Section 4.10 of the Indenture, the Trustee shall
                  execute any documents reasonably required in order to evidence
                  the release of the Guaranteeing Subsidiary from its
                  Obligations under this Supplemental Indenture and its
                  Subsidiary Guarantee made pursuant hereto. If the Guaranteeing
                  Subsidiary is not released from its Obligations under its
                  Subsidiary Guarantee, it shall remain liable for the full
                  amount of principal of and interest on the Notes and for the
                  other Obligations of such Guaranteeing Subsidiary under the
                  Indenture as provided in this Supplemental Indenture.

             (b)  Upon the designation of a Guaranteeing Subsidiary as an
                  Unrestricted Subsidiary in accordance with the terms of the
                  Indenture, such Guaranteeing Subsidiary shall be released and
                  relieved of its Obligations under its Subsidiary Guarantee and
                  this Supplemental Indenture. Upon delivery by the Company to
                  the Trustee of an Officers' Certificate and an Opinion of
                  Counsel to the effect that such designation of such
                  Guaranteeing Subsidiary as an Unrestricted Subsidiary was made
                  by the

                                      E-5

                  Company in accordance with the provisions of the Indenture,
                  including without limitation Section 4.07 of the Indenture,
                  the Trustee shall execute any documents reasonably required in
                  order to evidence the release of such Guaranteeing Subsidiary
                  from its Obligations under its Subsidiary Guarantee. Any
                  Guaranteeing Subsidiary not released from its Obligations
                  under its Subsidiary Guarantee shall remain liable for the
                  full amount of principal of and interest on the Notes and for
                  the other Obligations of any Guaranteeing Subsidiary under the
                  Indenture as provided herein.

             (c)  Each Guaranteeing Subsidiary shall be released and relieved of
                  its obligations under this Supplemental Indenture in
                  accordance with, and subject to, Section 4.18 of the
                  Indenture.

         6. NO RECOURSE AGAINST OTHERS. No past, present or future director,
officer, employee, incorporator, stockholder or agent of any Subsidiary of the
Company, as such, shall have any liability for any Obligations of the Company or
any Subsidiary of the Company under the Notes, any Subsidiary Guarantees, the
Indenture or this Supplemental Indenture or for any claim based on, in respect
of, or by reason of, such Obligations or their creation. Each Holder of the
Notes by accepting a Note waives and releases all such liability. The waiver and
release are part of the consideration for issuance of the Notes. Such waiver may
not be effective to waive liabilities under the federal securities laws and it
is the view of the SEC that such a waiver is against public policy.

         7. ANTI-LAYERING; SUBORDINATION OF SUBSIDIARY GUARANTEES. No
Guaranteeing Subsidiary shall incur, create, issue, assume, guarantee or
otherwise become liable for any Indebtedness that is subordinate or junior in
right of payment to any Senior Debt of a Guaranteeing Subsidiary and senior in
any respect in right of payment to any of the Subsidiary Guarantees.
Notwithstanding the foregoing sentence, the Subsidiary Guarantee of each
Guaranteeing Subsidiary shall be subordinated to the prior payment in full of
all Senior Debt of that Guaranteeing Subsidiary (in the same manner and to the
same extent that the Notes are subordinated to Senior Debt), which shall include
all guarantees of Senior Debt.

         8. NEW YORK LAW TO GOVERN. THIS SUPPLEMENTAL INDENTURE SHALL BE
GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW
YORK.

         9. 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.

         10. EFFECT OF HEADINGS. The Section headings herein are for convenience
only and shall not affect the construction hereof.

         11. THE TRUSTEE. The Trustee shall not be responsible in any manner
whatsoever for or in respect of the validity or sufficiency of this Supplemental
Indenture or for or in respect of the recitals contained herein, all of which
recitals are made solely by the Guaranteeing Subsidiaries and the Company.

                                      E-6

                      [THIS PAGE INTENTIONALLY LEFT BLANK]

                                      E-7

                  IN WITNESS WHEREOF, the parties hereto have caused this
Supplemental Indenture to be duly executed, all as of the date first above
written.

Dated:  ______________, ______

                                         L-3 COMMUNICATIONS CORPORATION

                                         By:
                                            ------------------------------------
                                            Name:
                                            Title:

GUARANTEEING SUBSIDIARIES:

[EXISTING GUARANTORS]
[ADDITIONAL GUARANTORS]

Dated:  ______________, ______

THE BANK OF NEW YORK,
         as Trustee

By:
    --------------------------------
    Name:
    Title:

                                      E-8

                                    EXHIBIT F

  FORM OF NOTATION ON SENIOR SUBORDINATED NOTE RELATING TO SUBSIDIARY GUARANTEE

                  Pursuant to the Indenture (the "Indenture"), dated as of
December 22, 2003, among L-3 Communications Corporation, the Guarantors party
thereto (each a "Guarantor" and collectively the "Guarantors") and The Bank of
New York, as trustee (the "Trustee"), each Guarantor (i) has jointly and
severally unconditionally guaranteed (a) the due and punctual payment of the
principal of, and premium, interest and Additional Interest on the Notes,
whether at maturity or an interest payment date, by acceleration, call for
redemption or otherwise, (b) the due and punctual payment of interest on the
overdue principal and premium of, and interest and Additional Interest on the
Notes, and (c) in case of any extension of time of payment or renewal of any
Notes or any of such other Obligations, the same will be promptly paid in full
when due in accordance with the terms of the extension or renewal, whether at
stated maturity, by acceleration or otherwise and (ii) has agreed to pay any and
all costs and expenses (including reasonable attorneys' fees) incurred by the
Trustee or any Holder in enforcing any rights under the Subsidiary Guarantee (as
defined in the Supplemental Indenture). Notwithstanding the foregoing, the
Subsidiary Guarantee of each Guarantor shall be subordinated to the prior
payment in full of all Senior Debt (as defined in the Indenture) of that
Guarantor (in the same manner and to the same extent that the Notes are
subordinated to Senior Debt), which shall include all guarantees of Senior Debt.

                  Notwithstanding the foregoing, in the event that the
Subsidiary Guarantee of any Guarantor would constitute or result in a violation
of any applicable fraudulent conveyance or similar law of any relevant
jurisdiction, the liability of such Guarantor under its Subsidiary Guarantee
shall be reduced to the maximum amount permissible under such fraudulent
conveyance or similar law.

                  No past, present or future director, officer, employee, agent,
incorporator, stockholder or agent of any Subsidiary of the Company, as such,
shall have any liability for any Obligations of the Company or any Subsidiary of
the Company under the Notes, any Subsidiary Guarantee, the Indenture, any
supplemental indenture delivered pursuant to the Indenture by such Guarantor, or
for any claim based on, in respect of or by reason of such Obligations or their
creation. Each Holder by accepting a Note waives and releases all such
liability.

                  The Subsidiary Guarantee shall be binding upon each Guarantor
and its successors and assigns 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.

                  The Subsidiary Guarantee shall not be valid or obligatory for
any purpose until the certificate of authentication on the Note upon which the
Subsidiary Guarantee is noted has been executed by the Trustee under the
Indenture by the manual signature of one of its

                                      F-1

authorized officers. Capitalized terms used herein have the meaning assigned to
them in the Indenture.

                                      F-2

                  IN WITNESS WHEREOF, the Guarantors hereto have caused this
Notation on Senior Subordinated Note to be duly executed, all as of the date
first above written.

Dated:  ______________, ______

GUARANTEEING SUBSIDIARIES:

[EXISTING GUARANTORS]
[ADDITIONAL GUARANTORS]

                                      F-3