EXHIBIT 10.73
                                                               EXECUTION VERSION

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                                  A/B EXCHANGE
                          REGISTRATION RIGHTS AGREEMENT

                            Dated as of July 29, 2005

                                  by and among

                         L-3 COMMUNICATIONS CORPORATION,

               THE GUARANTORS LISTED ON THE SIGNATURE PAGES HERETO

                                       AND

                              LEHMAN BROTHERS INC.
                         BANC OF AMERICA SECURITIES LLC
                            BEAR, STEARNS & CO. INC.
                         CREDIT SUISSE FIRST BOSTON LLC
                        MORGAN STANLEY & CO. INCORPORATED
                            SCOTIA CAPITAL (USA) INC.
                           SG AMERICAS SECURITIES, LLC
                         WACHOVIA CAPITAL MARKETS, INC.
                              BARCLAYS CAPITAL INC.
                            BNY CAPITAL MARKETS, INC.
                          CALYON SECURITIES (USA) INC.
                                  STEPHENS INC.

                            As the Initial Purchasers

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                   A/B EXCHANGE REGISTRATION RIGHTS AGREEMENT

     This Registration Rights Agreement (this "Agreement") is made and entered
into as of July 29, 2005 by and among L-3 Communications Corporation, a Delaware
corporation (the "Company") the guarantors listed on the signature pages hereto
(collectively, the "Existing Guarantors"), and Lehman Brothers Inc., Banc of
America Securities LLC, Bear, Stearns & Co. Inc., Credit Suisse First Boston
LLC, Morgan Stanley & Co. Incorporated, Scotia Capital (USA) Inc., SG Americas
Securities, LLC, Wachovia Capital Markets, Inc., Barclays Capital Inc., BNY
Capital Markets, Inc., Calyon Securities (USA) Inc. and Stephens Inc. (the
"Initial Purchasers") named in Schedule 1 to the Purchase Agreement (as defined
below), each of whom has agreed to purchase the Company's 6 3/8% Senior
Subordinated Notes due 2015 (the "Series A Notes") pursuant to the Purchase
Agreement (as defined below).

     This Agreement is made pursuant to the Purchase Agreement, dated as of July
27, 2005 (the "Purchase Agreement"), by and among the Company, the Existing
Guarantors and the Initial Purchasers. In order to induce the Initial Purchasers
to purchase the Series A Notes, the Company and the Existing Guarantors have
agreed to provide the registration rights set forth in this Agreement. The
execution and delivery of this Agreement is a condition to the obligations of
the Initial Purchasers set forth in Section 3 of the Purchase Agreement.

     The parties hereby agree as follows:

SECTION 1 DEFINITIONS

     As used in this Agreement, the following capitalized terms shall have the
following meanings:

     Act: The Securities Act of 1933, as amended.

     Additional Guarantor: Any subsidiary of the Company that executes a
Subsidiary Guarantee under the Indenture after the date of this Agreement.

     Broker-Dealer: Any broker or dealer registered under the Exchange Act.

     Closing Date: The date of this Agreement.

     Commission: The Securities and Exchange Commission.

     Consummate: A Registered Exchange Offer shall be deemed "Consummated" for
purposes of this Agreement upon the occurrence of (i) the filing and
effectiveness under the Act of the Exchange Offer Registration Statement
relating to the Series B Notes to be issued in the Exchange Offer, (ii) the
maintenance of such Registration Statement continuously effective and the
keeping of the Exchange Offer open for a period not less than the minimum period
required pursuant to Section 3(b) hereof and (iii) the delivery by the Company
to the Registrar under the Indenture of Series B Notes in the same aggregate
principal amount as the aggregate principal amount of Series A Notes that were
tendered by Holders thereof pursuant to the Exchange Offer.

     Damages Payment Date: With respect to the Series A Notes, each Interest
Payment Date.

     Effectiveness Target Date: As defined in Section 5.



     Exchange Act: The Securities Exchange Act of 1934, as amended.

     Exchange Offer: The registration by the Company under the Act of the Series
B Notes (including the Subsidiary Guarantees) pursuant to a Registration
Statement pursuant to which the Company offers the Holders of all outstanding
Transfer Restricted Securities the opportunity to exchange all such outstanding
Transfer Restricted Securities held by such Holders for Series B Notes and
registered Subsidiary Guarantees in an aggregate principal amount equal to the
aggregate principal amount of the Transfer Restricted Securities tendered in
such exchange offer by such Holders.

     Exchange Offer Registration Statement: The Registration Statement relating
to the Exchange Offer, including the related Prospectus.

     Exempt Resales: The transactions in which the Initial Purchasers propose to
sell the Series A Notes to (i) certain "qualified institutional buyers," as such
term is defined in Rule 144A under the Act, (ii) to certain institutional
"accredited investors," as such term is defined in Rule 501(a)(1), (2), (3) and
(7) under the Act ("Accredited Institutions") and (iii) outside the United
States to Persons other than U.S. Persons in offshore transactions meeting the
requirements of rule 904 of Regulation S under the Act.

     Guarantors: The Additional Guarantors and the Existing Guarantors.

     Holders: As defined in Section 2 hereof.

     Indenture: The Indenture, dated as of the date hereof, among the Company,
the Existing Guarantors and The Bank of New York, as trustee (the "Trustee"),
pursuant to which the Notes are to be issued, as such Indenture is amended or
supplemented from time to time in accordance with the terms thereof.

     Initial Purchasers: As defined in the preamble hereto.

     Interest Payment Date: As defined in the Notes.

     NASD: National Association of Securities Dealers, Inc.

     Notes: The Series A Notes and the Series B Notes.

     Offering Memorandum: As defined in the Purchase Agreement.

     Person: An individual, partnership, corporation, trust, limited liability
company or unincorporated organization, or a government or agency or political
subdivision thereof.

     Prospectus: The prospectus included in a Registration Statement, as amended
or supplemented by any prospectus supplement and by all other amendments
thereto, including post-effective amendments, and all material incorporated by
reference into such Prospectus.

     Record Holder: With respect to any Damages Payment Date relating to Notes,
each Person who is a Holder of Notes on the record date with respect to the
Interest Payment Date on which such Damages Payment Date shall occur.

     Registration Default: As defined in Section 5 hereof.

     Registrar: As defined in the Indenture.


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     Registration Statement: Any registration statement of the Company relating
to (a) an offering of Series B Notes pursuant to an Exchange Offer or (b) the
registration for resale of Transfer Restricted Securities pursuant to the Shelf
Registration Statement, which is filed pursuant to the provisions of this
Agreement, in each case including the Prospectus included therein, all
amendments and supplements thereto (including post-effective amendments) and all
exhibits and material incorporated by reference therein.

     Series B Notes: The Company's 6 3/8% Senior Subordinated Notes due 2015 to
be issued pursuant to the Indenture in the Exchange Offer.

     Shelf Filing Deadline: As defined in Section 4 hereof.

     Shelf Registration Statement: As defined in Section 4 hereof.

     Subsidiary Guarantee: The Guarantee by a Guarantor of the Company's
obligations under the Notes and Indenture.

     TIA: The Trust Indenture Act of 1939 (15 U.S.C. Section 77aaa-77bbbb) as in
effect on the date of the Indenture.

     Transfer Restricted Securities: Each Note (including the Subsidiary
Guarantees), until the earliest to occur of (a) the date on which such Note is
exchanged by a person other than a Broker-Dealer for a Series B Note in the
Exchange Offer, (b) following the exchange by a Broker-Dealer in the Exchange
Offer of a Note for a Series B Note, the date on which such Series B Note is
sold to a purchaser who receives from such Broker-Dealer on or prior to the date
of such sale a copy of the Prospectus contained in the Exchange Offer
Registration Statement, (c) the date on which such Note (including the
Subsidiary Guarantees) is effectively registered under the Act and disposed of
in accordance with the Shelf Registration Statement or (d) the date on which
such Note (including the Subsidiary Guarantees) is distributed to the public
pursuant to Rule 144 under the Act.

     Underwritten Registration or Underwritten Offering: A registration in which
securities of the Company are sold to an underwriter for reoffering to the
public.

SECTION 2 SECURITIES SUBJECT TO THIS AGREEMENT

     (a) Transfer Restricted Securities. The securities entitled to the benefits
of this Agreement are the Transfer Restricted Securities.

     (b) Holders of Transfer Restricted Securities. A Person is deemed to be a
holder of Transfer Restricted Securities (each, a "Holder") whenever such Person
owns Transfer Restricted Securities.

SECTION 3 REGISTERED EXCHANGE OFFER

     (a) Unless the Exchange Offer shall not be permissible under applicable law
or Commission policy (after the procedures set forth in Section 6(a) below have
been complied with), the Company and the Guarantors shall (i) cause to be filed
with the Commission as promptly as practicable after the Closing Date, but in no
event later than 120 days after the Closing Date, a Registration Statement under
the Act relating to the Series B Notes (including the Subsidiary Guarantees) and
the Exchange Offer, (ii) use commercially reasonable efforts to cause such
Registration Statement to be declared effective by the Commission as promptly as
practicable, but in no event later than 210 days after the Closing Date (which
210-day period shall be extended for a number of days equal to the number of
business days, if any, the


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Commission is officially closed during such period), (iii) in connection with
the foregoing, file (A) all pre-effective amendments to such Registration
Statement as may be necessary in order to cause such Registration Statement to
become effective, (B) if applicable, a post-effective amendment to such
Registration Statement pursuant to Rule 430A under the Act and (C) cause all
necessary filings in connection with the registration and qualification of the
Series B Notes (including the Subsidiary Guarantees) to be made under the Blue
Sky laws of such jurisdictions as are necessary to permit Consummation of the
Exchange Offer and (iv) upon the effectiveness of such Registration Statement,
commence the Exchange Offer. The Exchange Offer shall be on the appropriate form
permitting registration of the Series B Notes (including the Subsidiary
Guarantees) to be offered in exchange for the Transfer Restricted Securities and
to permit resales of Notes held by Broker-Dealers as contemplated by Section
3(c) below.

     (b) The Company and the Guarantors shall cause the Exchange Offer
Registration Statement to be effective continuously and shall keep the Exchange
Offer open for a period of not less than the minimum period required under
applicable federal and state securities laws to Consummate the Exchange Offer;
provided, however, that in no event shall such period be less than 20 business
days. The Company and the Guarantors shall cause the Exchange Offer to comply
with all applicable federal and state securities laws. No securities other than
the Notes (including the Subsidiary Guarantees) shall be included in the
Exchange Offer Registration Statement. The Company and the Guarantors shall use
commercially reasonable efforts to cause the Exchange Offer to be Consummated on
the earliest practicable date after the Exchange Offer Registration Statement
has become effective, but in no event later than 30 business days thereafter.

     (c) The Company and the Guarantors shall indicate in a "Plan of
Distribution" section contained in the Prospectus contained in the Exchange
Offer Registration Statement that any Broker-Dealer who owns Series A Notes that
are Transfer Restricted Securities and that were acquired for its own account as
a result of market-making activities or other trading activities (other than
Transfer Restricted Securities acquired directly from the Company), may exchange
such Series A Notes pursuant to the Exchange Offer; however, such Broker-Dealer
may be deemed to be an "underwriter" within the meaning of the Act and must,
therefore, deliver a Prospectus meeting the requirements of the Act in
connection with any resales of the Series B Notes received by such Broker-Dealer
in the Exchange Offer, which Prospectus delivery requirement may be satisfied by
the delivery by such Broker-Dealer of the Prospectus contained in the Exchange
Offer Registration Statement. Such "Plan of Distribution" section shall also
contain all other information with respect to such resales by Broker-Dealers
that the Commission may require in order to permit such resales pursuant
thereto, but such "Plan of Distribution" shall not name any such Broker-Dealer
or disclose the amount of Notes held by any such Broker-Dealer except to the
extent required by the Commission.

     The Company and the Guarantors shall use commercially reasonable efforts to
keep the Exchange Offer Registration Statement continuously effective,
supplemented and amended as required by the provisions of Section 6(c) below to
the extent necessary to ensure that it is available for resales of Notes
acquired by Broker-Dealers for their own accounts as a result of market-making
activities or other trading activities, and to ensure that it conforms with the
requirements of this Agreement, the Act and the policies, rules and regulations
of the Commission as announced from time to time, for a period of 210 days from
the date on which the Exchange Offer Registration Statement is declared
effective or such shorter period that will terminate when all Notes covered by
the Exchange Offer Registration Statement have been exchanged in the Exchange
Offer.

     The Company and the Guarantors shall provide sufficient copies of the
latest version of such Prospectus to Broker-Dealers promptly upon request at any
time during such 210 day period in order to facilitate such resales.


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SECTION 4 SHELF REGISTRATION

     (a) Shelf Registration. If (i) the Company and the Guarantors are not
required to file the Exchange Offer Registration Statement or permitted to
Consummate the Exchange Offer because the Exchange Offer is not permitted by
applicable law or Commission policy (after the procedures set forth in Section
6(a) below have been complied with) or (ii) any Holder of Transfer Restricted
Securities that is a "qualified institutional buyer," as such term is defined in
Rule 144A under the Act or an institutional "accredited investor," as such term
is defined in Rule 501(a)(1), (2), (3) and (7) under the Act shall notify the
Company prior to the 20th day following the Consummation of the Exchange Offer
that such Holder alone or together with holders who hold in the aggregate at
least $1.0 million in principal amount of Series A Notes (A) is prohibited by
applicable law or Commission policy from participating in the Exchange Offer, or
(B) may not resell the Series B Notes acquired by it in the Exchange Offer to
the public without delivering a prospectus and that the Prospectus contained in
the Exchange Offer Registration Statement is not appropriate or available for
such resales by such Holder, or (C) is a Broker-Dealer and holds Series A Notes
acquired directly from the Company or an affiliate of the Company, the Company
and the Guarantors shall:

          (i) cause to be filed with the Commission a shelf Registration
     Statement pursuant to Rule 415 under the Act, which may be an amendment to
     the Exchange Offer Registration Statement (in either event, the "Shelf
     Registration Statement") on or prior to the earliest to occur of (A) the
     30th day after the date on which the Company determines that it is not
     required to file the Exchange Offer Registration Statement, or permitted to
     Consummate the Exchange Offer and (B) the 30th day after the date on which
     the Company receives notice from a Holder of Transfer Restricted Securities
     as contemplated by clause (ii) of paragraph (a) above (such earliest date
     being the "Shelf Filing Deadline"), which Shelf Registration Statement
     shall provide for resales of all Transfer Restricted Securities the Holders
     of which shall have provided the information required pursuant to Section
     4(b) hereof; and

          (ii) use commercially reasonable efforts to cause such Shelf
     Registration Statement to be declared effective by the Commission on or
     before the 90th day after the Shelf Filing Deadline.

The Company and the Guarantors shall use commercially reasonable efforts to keep
such Shelf Registration Statement continuously effective, supplemented and
amended as required by the provisions of Sections 6(b) and (c) hereof to the
extent necessary to ensure that it is available for resales of Notes by the
Holders of Transfer Restricted Securities entitled to the benefit of this
Section 4(a), and to ensure that it conforms with the requirements of this
Agreement, the Act and the policies, rules and regulations of the Commission as
announced from time to time, for a period of at least two years following the
Closing Date or such shorter period that will terminate when all Notes covered
by the Shelf Registration Statement have been sold pursuant to the Shelf
Registration Statement or become eligible for resale pursuant to Rule 144
without volume or other restrictions.

     (b) Provision by Holders of Certain Information in Connection with the
Shelf Registration Statement. No Holder of Transfer Restricted Securities may
include any of its Transfer Restricted Securities in any Shelf Registration
Statement pursuant to this Agreement unless and until such Holder furnishes to
the Company in writing, within 10 business days after receipt of a request
therefor, such information as the Company may reasonably request for use in
connection with any Shelf Registration Statement or Prospectus or preliminary
Prospectus included therein. No Holder of Transfer Restricted Securities shall
be entitled to additional interest pursuant to Section 5 hereof unless and until
such Holder shall have used its best efforts to provide all such reasonably
requested information. Each Holder as to which any Shelf Registration Statement
is being effected agrees to furnish promptly to the Company all


                                        5



information required to be disclosed in order to make the information previously
furnished to the Company by such Holder not materially misleading.

SECTION 5 ADDITIONAL INTEREST

     If (i) any of the Registration Statements required by this Agreement is not
filed with the Commission on or prior to the date specified for such filing in
sections 3(a) and 4(a), as applicable, (ii) any of such required Registration
Statements has not been declared effective by the Commission on or prior to the
date specified for such effectiveness in sections 3(a) and 4(a), as applicable,
(the "Effectiveness Target Date"), (iii) the Exchange Offer has not been
Consummated within 30 business days after the Effectiveness Target Date with
respect to the Exchange Offer Registration Statement, or (iv) any Registration
Statement required by this Agreement is filed and declared effective but shall
thereafter cease to be effective or fail to be usable for its intended purpose
without being succeeded within five business days by a post-effective amendment
to such Registration Statement that cures such failure and that is itself
immediately declared effective (each such event referred to in clauses (i)
through (iv), a "Registration Default"), the Company and the Guarantors jointly
and severally agree to pay additional interest to each Holder of Transfer
Restricted Securities with respect to the first 90-day period immediately
following the occurrence of such Registration Default, in an amount equal to
$.05 per week per $1,000 principal amount of Transfer Restricted Securities held
by such Holder for each week or portion thereof that the Registration Default
continues. The amount of the additional interest shall increase by an additional
$.05 per week per $1,000 in principal amount of Transfer Restricted Securities
with respect to each subsequent 90-day period until all Registration Defaults
have been cured, up to a maximum amount of additional interest of $.50 per week
per $1,000 principal amount of Transfer Restricted Securities. The Company shall
in no event be required to pay additional interest for more than one
Registration Default at any given time. All accrued additional interest shall be
paid to Record Holders by the Company and the Guarantors by wire transfer of
immediately available funds or by federal funds check on each Damages Payment
Date, as provided in the Indenture. Following the cure of all Registration
Defaults relating to any particular Transfer Restricted Securities, the accrual
of additional interest with respect to such Transfer Restricted Securities will
cease.

     All payment obligations of the Company and the Guarantors set forth in the
preceding paragraph that are outstanding with respect to any Transfer Restricted
Security at the time such security ceases to be a Transfer Restricted Security
shall survive until such time as all such payment obligations with respect to
such Security shall have been satisfied in full provided, however, that the
additional interest shall cease to accrue on the day immediately prior to the
date such Transfer Restricted Securities cease to be Transfer Restricted
Securities.

SECTION 6 REGISTRATION PROCEDURES

     (a) Exchange Offer Registration Statement. In connection with the Exchange
Offer, the Company and the Guarantors shall comply with all of the provisions of
Section 6(c) below, shall use commercially reasonable efforts to effect such
exchange to permit the sale of Transfer Restricted Securities being sold in
accordance with the intended method or methods of distribution thereof, and
shall comply with all of the following provisions:

          (i) If in the reasonable opinion of counsel to the Company and the
     Guarantors there is a question as to whether the Exchange Offer is
     permitted by applicable law, the Company and the Guarantors hereby agree to
     seek a no-action letter or other favorable decision from the Commission
     allowing the Company and the Guarantors to Consummate an Exchange Offer for
     such Series A Notes. The Company and the Guarantors hereby agree to pursue
     the issuance of such a decision to the Commission staff level but shall not
     be required to take commercially


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     unreasonable action to effect a change of Commission policy. The Company
     and the Guarantors hereby agree however, to (A) participate in telephonic
     conferences with the Commission, (B) deliver to the Commission staff an
     analysis prepared by counsel to the Company and the Guarantors setting
     forth the legal bases, if any, upon which such counsel has concluded that
     such an Exchange Offer should be permitted and (C) diligently pursue a
     resolution (which need not be favorable) by the Commission staff of such
     submission.

          (ii) As a condition to its participation in the Exchange Offer
     pursuant to the terms of this Agreement, each Holder of Transfer Restricted
     Securities shall furnish, upon the request of the Company, prior to the
     Consummation thereof, a written representation to the Company and the
     Guarantors (which may be contained in the letter of transmittal
     contemplated by the Exchange Offer Registration Statement) to the effect
     that (A) it is not an affiliate of the Company, (B) it is not engaged in,
     and does not intend to engage in, and has no arrangement or understanding
     with any person to participate in, a distribution of the Series B Notes to
     be issued in the Exchange Offer and (C) it is acquiring the Series B Notes
     in its ordinary course of business. In addition, all such Holders of
     Transfer Restricted Securities shall otherwise cooperate in the Company's
     and the Guarantors' preparations for the Exchange Offer. Each Holder hereby
     acknowledges and agrees that any Broker-Dealer and any such Holder using
     the Exchange Offer to participate in a distribution of the securities to be
     acquired in the Exchange Offer (A) could not under Commission policy as in
     effect on the date of this Agreement rely on the position of the Commission
     enunciated in Morgan Stanley and Co., Inc. (available June 5, 1991) and
     Exxon Capital Holdings Corporation (available May 13, 1988), as interpreted
     in the Commission's letter to Shearman & Sterling dated July 2, 1993, and
     similar no-action letters (including any no-action letter obtained pursuant
     to clause (i) above), and (B) must comply with the registration and
     prospectus delivery requirements of the Act in connection with a secondary
     resale transaction and that such a secondary resale transaction should be
     covered by an effective Registration Statement containing the selling
     security holder information required by Item 507 or 508, as applicable, of
     Regulation S-K if the resales are of Series B Notes obtained by such Holder
     in exchange for Series A Notes acquired by such Holder directly from the
     Company.

          (iii) Prior to effectiveness of the Exchange Offer Registration
     Statement, the Company and the Guarantors shall provide a supplemental
     letter to the Commission (A) stating that the Company and the Guarantors
     are registering the Exchange Offer in reliance on the position of the
     Commission enunciated in Exxon Capital Holdings Corporation (available May
     13, 1988), Morgan Stanley and Co., Inc. (available June 5, 1991) and, if
     applicable, any no-action letter obtained pursuant to clause (i) above and
     (B) including a representation that neither the Company nor any Guarantor
     has entered into any arrangement or understanding with any Person to
     distribute the Series B Notes to be received in the Exchange Offer and
     that, to the best of the Company's and each Guarantor's information and
     belief, each Holder participating in the Exchange Offer is acquiring the
     Series B Notes in its ordinary course of business and has no arrangement or
     understanding with any Person to participate in the distribution of the
     Series B Notes received in the Exchange Offer.

     (b) Shelf Registration Statement. In connection with the Shelf Registration
Statement, the Company and the Guarantors shall comply with all the provisions
of Section 6(c) below and shall use commercially reasonable efforts to effect
such registration to permit the sale of the Transfer Restricted Securities being
sold in accordance with the intended method or methods of distribution thereof,
and pursuant thereto the Company and the Guarantors will as expeditiously as
possible prepare and file with the Commission a Registration Statement relating
to the registration on any appropriate form under the Act, which form shall be
available for the sale of the Transfer Restricted Securities in accordance with
the intended method or methods of distribution thereof.


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     (c) General Provisions. In connection with any Registration Statement and
any Prospectus required by this Agreement to permit the sale or resale of
Transfer Restricted Securities (including, without limitation, any Registration
Statement and the related Prospectus required to permit resales of Notes by
Broker-Dealers), the Company and the Guarantors shall:

          (i) use commercially reasonable efforts to keep such Registration
     Statement continuously effective and provide all requisite financial
     statements (including, if required by the Act or any regulation thereunder,
     financial statements of any Guarantors) for the period specified in Section
     3 or 4 of this Agreement, as applicable; upon the occurrence of any event
     that would cause any such Registration Statement or the Prospectus
     contained therein (A) to contain a material misstatement or omission or (B)
     not to be effective and usable for resale of Transfer Restricted Securities
     during the period required by this Agreement, the Company and the
     Guarantors shall file promptly an appropriate amendment to such
     Registration Statement, in the case of clause (A), correcting any such
     misstatement or omission, and, in the case of either clause (A) or (B), use
     commercially reasonable efforts to cause such amendment to be declared
     effective and such Registration Statement and the related Prospectus to
     become usable for their intended purpose(s) as soon as practicable
     thereafter. Notwithstanding the foregoing, at any time after Consummation
     of the Exchange Offer, the Company and the Guarantors may allow the Shelf
     Registration Statement to cease to become effective and usable if (A) the
     board of directors of the Company determines in good faith that it is in
     the best interests of the Company not to disclose the existence of or facts
     surrounding any proposed or pending material corporate transaction
     involving the Company and the Guarantors, and the Company notifies the
     Holders within two business days after the Board of Directors makes such
     determination, or (B) the Prospectus contained in the Shelf Registration
     Statement contains an untrue statement of the material fact or omits to
     state a material fact necessary in order to make the statements therein, in
     light of the circumstances under which they were made, not misleading;
     provided that the two-year period referred to in Section 4(a) hereof during
     which the Shelf Registration Statement is required to be effective and
     usable shall be extended by the number of days during which such
     Registration Statement was not effective or usable pursuant to the
     foregoing provisions;

          (ii) subject to Section 6(c)(i), prepare and file with the Commission
     such amendments and post-effective amendments to the Registration Statement
     as may be necessary to keep the Registration Statement effective for the
     applicable period set forth in Section 3 or 4 hereof, as applicable, or
     such shorter period as will terminate when all Transfer Restricted
     Securities covered by such Registration Statement have been sold; cause the
     Prospectus to be supplemented by any required Prospectus supplement, and as
     so supplemented to be filed pursuant to Rule 424 under the Act, and to
     comply fully with the applicable provisions of Rules 424 and 430A under the
     Act in a timely manner; and comply with the provisions of the Act with
     respect to the disposition of all securities covered by such Registration
     Statement during the applicable period in accordance with the intended
     method or methods of distribution by the sellers thereof set forth in such
     Registration Statement or supplement to the Prospectus;

          (iii) advise the underwriter(s), if any, and selling Holders of
     Transfer Restricted Securities and, if requested by such Persons, to
     confirm such advice in writing, (A) when the Prospectus or any Prospectus
     supplement or post-effective amendment has been filed, and, with respect to
     any Registration Statement or any post-effective amendment thereto, when
     the same has become effective, (B) of any request by the Commission for
     amendments to the Registration Statement or amendments or supplements to
     the Prospectus or for additional information relating thereto, (C) of the
     issuance by the Commission of any stop order suspending the effectiveness
     of the Registration Statement under the Act or of the suspension by any
     state securities commission of the qualification of the Transfer Restricted
     Securities for offering or sale in any jurisdiction, or


                                        8



     the initiation of any proceeding for any of the preceding purposes and (D)
     of the existence of any fact or the happening of any event that makes any
     statement of a material fact made in the Registration Statement, the
     Prospectus, any amendment or supplement thereto, or any document
     incorporated by reference therein untrue, or that requires the making of
     any additions to or changes in the Registration Statement or the Prospectus
     in order to make the statements therein not misleading. If at any time the
     Commission shall issue any stop order suspending the effectiveness of the
     Registration Statement, or any state securities commission or other
     regulatory authority shall issue an order suspending the qualification or
     exemption from qualification of the Transfer Restricted Securities under
     state securities or Blue Sky laws, the Company and the Guarantors shall use
     commercially reasonable efforts to obtain the withdrawal or lifting of such
     order at the earliest possible time;

          (iv) upon written request, furnish to each of the selling Holders of
     Transfer Restricted Securities and each of the underwriter(s), if any,
     before filing with the Commission, copies of any Registration Statement or
     any Prospectus included therein or any amendments or supplements to any
     such Registration Statement or Prospectus (including all documents
     incorporated by reference after the initial filing of such Registration
     Statement), which documents will be subject to the review of such Holders
     and underwriter(s), if any, for a period of at least five business days,
     and the Company and the Guarantors will not file any such Registration
     Statement or Prospectus or any amendment or supplement to any such
     Registration Statement or Prospectus (including all such documents
     incorporated by reference) if a selling Holder of Transfer Restricted
     Securities covered by such Registration Statement or the underwriter(s), if
     any, shall reasonably object within 5 business days after receipt thereof;

          (v) upon written request, promptly prior to the filing of any document
     that is to be incorporated by reference into a Registration Statement or
     Prospectus, provide copies of such document to the selling Holders and to
     the underwriter(s), if any, make the Company's and the Guarantors'
     representatives available for discussion of such document and other
     customary due diligence matters, and include such information in such
     document prior to the filing thereof as such selling Holders or
     underwriter(s), if any, reasonably may request;

          (vi) in the case of a Shelf Registration Statement, make available at
     reasonable times at the Company's principal place of business for
     inspection by the selling Holders of Transfer Restricted Securities, any
     underwriter participating in any disposition pursuant to such Registration
     Statement, and any attorney or accountant retained by such selling Holders
     or any of the underwriter(s) who shall certify to the Company and the
     Guarantors that they have a current intention to sell Transfer Restricted
     Securities pursuant to a Shelf Registration Statement, such financial and
     other information of the Company and the Guarantors as reasonably requested
     and cause the Company's and the Guarantors' officers, directors and
     employees to respond to such inquiries as shall be reasonably necessary, in
     the reasonable judgment of counsel to such Holders, to conduct a reasonable
     investigation; provided, however, that each such party shall be required to
     maintain in confidence and not to disclose to any other person any
     information or records reasonably designated by the Company in writing as
     being confidential, until such time as (A) such information becomes a
     matter of public record (whether by virtue of its inclusion in such
     Registration Statement or otherwise), or (B) such person shall be required
     so to disclose such information pursuant to the subpoena or order of any
     court or other governmental agency or body having jurisdiction over the
     matter (subject to the requirements of such order, and only after such
     person shall have given the Company prompt prior written notice of such
     requirement), or (C) such information is required to be set forth in such
     Registration Statement or the Prospectus included therein or in an
     amendment to such Registration Statement or an amendment or supplement to
     such Prospectus in order that such Registration Statement, Prospectus,
     amendment


                                        9



     or supplement, as the case may be, does not contain an untrue statement of
     a material fact or omit to state therein a material fact required to be
     stated therein or necessary to make the statements therein not misleading;

          (vii) if requested by any selling Holders of Transfer Restricted
     Securities or the underwriter(s), if any, promptly incorporate in any
     Registration Statement or Prospectus, pursuant to a supplement or
     post-effective amendment if necessary, such information as such selling
     Holders and underwriter(s), if any, may reasonably request to have included
     therein, including, without limitation, information relating to the "Plan
     of Distribution" of the Transfer Restricted Securities information with
     respect to the principal amount of Transfer Restricted Securities being
     sold to such underwriter(s), the purchase price being paid therefor and any
     other terms of the offering of the Transfer Restricted Securities to be
     sold in such offering; and make all required filings of such Prospectus
     supplement or post-effective amendment as soon as practicable after the
     Company is notified of the matters to be incorporated in such Prospectus
     supplement or post-effective amendment;

          (viii) upon request, furnish to each selling Holder of Transfer
     Restricted Securities and each of the underwriter(s), if any, without
     charge, at least one copy of the Registration Statement, as first filed
     with the Commission, and of each amendment thereto, including all documents
     incorporated by reference therein and all exhibits (including exhibits
     incorporated therein by reference);

          (ix) deliver to each selling Holder of Transfer Restricted Securities
     and each of the underwriter(s), if any, without charge, as many copies of
     the Prospectus (including each preliminary prospectus) and any amendment or
     supplement thereto as such Persons reasonably may request; the Company and
     the Guarantors hereby consent to the use of the Prospectus and any
     amendment or supplement thereto by each of the selling Holders and each of
     the underwriter(s), if any, in connection with the offering and the sale of
     the Transfer Restricted Securities covered by the Prospectus or any
     amendment or supplement thereto;

          (x) enter into such agreements (including an underwriting agreement),
     and make such representations and warranties, and take all such other
     actions in connection therewith in order to expedite or facilitate the
     disposition of the Transfer Restricted Securities pursuant to any
     Registration Statement contemplated by this Agreement, all to such extent
     as may be requested by the Initial Purchaser or, in the case of
     registration for resale of Transfer Restricted Securities pursuant to the
     Shelf Registration Statement, by any Holder or Holders of Transfer
     Restricted Securities who hold at least 25% in aggregate principal amount
     of such class of Transfer Restricted Securities; provided, that, the
     Company and the Guarantors shall not be required to enter into any such
     agreement more than once with respect to all of the Transfer Restricted
     Securities and, in the case of a Shelf Registration Statement, may delay
     entering into such agreement if the Board of Directors of the Company
     determines in good faith that it is in the best interests of the Company
     and the Guarantors not to disclose the existence of or facts surrounding
     any proposed or pending material corporate transaction involving the
     Company and the Guarantors; and whether or not an underwriting agreement is
     entered into and whether or not the registration is an Underwritten
     Registration, the Company and the Guarantors shall:

               (A) furnish to the Initial Purchasers, the Holders of Transfer
          Restricted Securities who hold at least 25% in aggregate principal
          amount of such class of Transfer Restricted Securities (in the case of
          a Shelf Registration Statement) and each underwriter, if any, in such
          substance and scope as they may request and as are customarily made in
          connection with an offering of debt securities pursuant to a
          Registration Statement (i) upon the effective date of


                                       10



          any Registration Statement (and if such Registration Statement
          contemplates an Underwritten Offering of Transfer Restricted
          Securities upon the date of the closing under the underwriting
          agreement related thereto) and (ii) upon the filing of any amendment
          or supplement to any Registration Statement or any other document that
          is incorporated in any Registration Statement by reference and
          includes financial data with respect to a fiscal quarter or year:

                    (1) a certificate, dated the date of effectiveness of the
               Shelf Registration Statement signed by (y) the respective
               Chairman of the Board, the respective President or any Vice
               President and (z) the respective Chief Financial Officer of the
               Company and each of the Guarantors confirming, as of the date
               thereof, the matters set forth in paragraph (h) of Section 7 of
               the Purchase Agreement and such other matters as such parties may
               reasonably request;

                    (2) an opinion, dated the date of effectiveness of the Shelf
               Registration Statement, as the case may be, of counsel for the
               Company covering the matters set forth in paragraphs (c) and (d)
               of Section 7 of the Purchase Agreement and such other matter as
               such parties may reasonably request, and in any event including a
               statement to the effect that such counsel has participated in
               conferences with officers and other representatives of the
               Company, representatives of the independent public accountants
               for the Company, the Initial Purchasers' representatives and the
               Initial Purchasers' counsel in connection with the preparation of
               such Registration Statement and the related Prospectus and have
               considered the matters required to be stated therein and the
               statements contained therein, although such counsel has not
               independently verified the accuracy, completeness or fairness of
               such statements; and that such counsel advises that, on the basis
               of the foregoing (relying as to materiality to a large extent
               upon facts provided to such counsel by officers and other
               representatives of the Company and without independent check or
               verification), no facts came to such counsel's attention that
               caused such counsel to believe that the applicable Registration
               Statement, at the time such Registration Statement or any
               post-effective amendment thereto became effective, and, in the
               case of the Exchange Offer Registration Statement, as of the date
               of Consummation, contained an untrue statement of a material fact
               or omitted to state a material fact required to be stated therein
               or necessary to make the statements therein not misleading, or
               that the Prospectus contained in such Registration Statement as
               of its date and, in the case of the opinion dated the date of
               Consummation of the Exchange Offer, as of the date of
               Consummation, contained an untrue statement of a material fact or
               omitted to state a material fact necessary in order to make the
               statements therein, in light of the circumstances under which
               they were made, not misleading. Such counsel may state further
               that such counsel assumes no responsibility for, and has not
               independently verified, the accuracy, completeness or fairness of
               the financial statements, notes and schedules and other financial
               data included in any Registration Statement contemplated by this
               Agreement or the related Prospectus; and

                    (3) a customary comfort letter, dated as of the date of
               Consummation of the Exchange Offer or the date of effectiveness
               of the Shelf Registration Statement, as the case may be, from the
               Company's independent accountants, in the customary form and
               covering matters of the type customarily covered in comfort
               letters by underwriters in connection with primary underwritten
               offerings, and affirming the matters set forth in the comfort
               letters delivered pursuant to Section 7 of the Purchase
               Agreement, without exception;


                                       11



               (B) set forth in full or incorporated by reference in the
          underwriting agreement, if any, the indemnification provisions and
          procedures of Section 8 hereof with respect to all parties to be
          indemnified pursuant to said Section; and

               (C) deliver such other documents and certificates as may be
          reasonably requested by such parties to evidence compliance with
          clause (A) above and with any customary conditions contained in the
          underwriting agreement or other agreement entered into by the Company
          and the Guarantors pursuant to this clause (x), if any.

          (xi) prior to any public offering of Transfer Restricted Securities,
     cooperate with the selling Holders of Transfer Restricted Securities, the
     underwriter(s), if any, and their respective counsel in connection with the
     registration and qualification of the Transfer Restricted Securities under
     the securities or Blue Sky laws of such jurisdictions as the selling
     Holders of Transfer Restricted Securities or underwriter(s) may reasonably
     request and do any and all other acts or things necessary or advisable to
     enable the disposition in such jurisdictions of the Transfer Restricted
     Securities covered by the Shelf Registration Statement filed pursuant to
     Section 4 hereof; provided, however, that the Company and the Guarantors
     shall not be required to register or qualify as a foreign corporation where
     it is not now so qualified or to take any action that would subject it to
     the service of process in suits or to taxation, other than as to matters
     and transactions relating to the Registration Statement, in any
     jurisdiction where it is not now so subject;

          (xii) shall issue, upon the request of any Holder of Series A Notes
     covered by the Shelf Registration Statement, Series B Notes, having an
     aggregate principal amount equal to the aggregate principal amount of
     Series A Notes surrendered to the Company by such Holder in exchange
     therefor or being sold by such Holder; such Series B Notes to be registered
     in the name of such Holder or in the name of the purchaser(s) of such
     Notes, as the case may be; in return, the Series A Notes held by such
     Holder shall be surrendered to the Company for cancellation;

          (xiii) cooperate with the selling Holders of Transfer Restricted
     Securities and the underwriter(s), if any, to facilitate the timely
     preparation and delivery of certificates representing Transfer Restricted
     Securities to be sold and not bearing any restrictive legends; and enable
     such Transfer Restricted Securities to be in such denominations and
     registered in such names as the Holders or the underwriter(s), if any, may
     request at least two business days prior to any sale of Transfer Restricted
     Securities made by such underwriter(s);

          (xiv) use commercially reasonable efforts to cause the Transfer
     Restricted Securities covered by the Registration Statement to be
     registered with or approved by such other governmental agencies or
     authorities as may be necessary to enable the seller or sellers thereof or
     the underwriter(s), if any, to consummate the disposition of such Transfer
     Restricted Securities, subject to the proviso contained in clause (xi)
     above;

          (xv) subject to clause (d)(i) above, if any fact or event contemplated
     by clause (d)(iii)(D) above shall exist or have occurred, prepare a
     supplement or post-effective amendment to the Registration Statement or
     related Prospectus or any document incorporated therein by reference or
     file any other required document so that, as thereafter delivered to the
     purchasers of Transfer Restricted Securities, the Prospectus will not
     contain an untrue statement of a material fact or omit to state any
     material fact required to be stated therein or necessary to make the
     statements therein not misleading;


                                       12



          (xvi) provide a CUSIP number for all Transfer Restricted Securities
     not later than the effective date of the Registration Statement and provide
     the Trustee under the Indenture with printed certificates for the Transfer
     Restricted Securities which are in a form eligible for deposit with The
     Depository Trust Company;

          (xvii) cooperate and assist in any filings required to be made with
     the NASD and in the performance of any due diligence investigation by any
     underwriter (including any "qualified independent underwriter") that is
     required to be retained in accordance with the rules and regulations of the
     NASD;

          (xviii) otherwise use commercially reasonable efforts to comply with
     all applicable rules and regulations of the Commission, and make generally
     available to its security holders, as soon as practicable, a consolidated
     earnings statement meeting the requirements of Rule 158 (which need not be
     audited) for the twelve-month period (A) commencing at the end of any
     fiscal quarter in which Transfer Restricted Securities are sold to
     underwriters in a firm or best efforts Underwritten Offering or (B) if not
     sold to underwriters in such an offering, beginning with the first month of
     the Company's first fiscal quarter commencing after the effective date of
     the Registration Statement;

          (xix) cause the Indenture to be qualified under the TIA not later than
     the effective date of the first Registration Statement required by this
     Agreement, and, in connection therewith, cooperate with the Trustee and the
     Holders of Notes to effect such changes to the Indenture as may be required
     for such Indenture to be so qualified in accordance with the terms of the
     TIA; and execute, and use commercially reasonable efforts to cause the
     Trustee to execute, all documents that may be required to effect such
     changes and all other forms and documents required to be filed with the
     Commission to enable such Indenture to be so qualified in a timely manner;

          (xx) provide promptly to each Holder upon request each document filed
     with the Commission pursuant to the requirements of Section 13 and Section
     15 of the Exchange Act; and

          (xxi) so long as any Transfer Restricted Securities remain
     outstanding, cause each Additional Guarantor upon the creation or
     acquisition by the Company of such Additional Guarantor, to execute a
     counterpart to this Agreement in the form attached hereto as Annex A and to
     deliver such counterpart, together with an opinion of counsel as to the
     enforceability thereof against such entity, to the Initial Purchasers no
     later than five business days following the execution thereof.

     Each Holder agrees by acquisition of a Transfer Restricted Security that,
upon receipt of any notice from the Company of the existence of any fact of the
kind described in Section 6(c)(iii)(D) hereof, such Holder will forthwith
discontinue disposition and will use its reasonable best efforts to cause any
underwriter to forthwith discontinue disposition of Transfer Restricted
Securities pursuant to the applicable Registration Statement until such Holder's
receipt of the copies of the supplemented or amended Prospectus contemplated by
Section 6(c)(xv) hereof, or until it is advised in writing (the "Advice") by the
Company that the use of the Prospectus may be resumed, and has received copies
of any additional or supplemental filings that are incorporated by reference in
the Prospectus. If so directed by the Company, each Holder will deliver to the
Company (at the Company's expense) all copies, other than permanent file copies
then in such Holder's possession, of the Prospectus covering such Transfer
Restricted Securities that was current at the time of receipt of such notice. In
the event the Company shall give any such notice, the time period regarding the
effectiveness of such Registration Statement set forth in Section 3 or 4 hereof,
as applicable, shall be extended by the number of days during the period from


                                       13



and including the date of the giving of such notice pursuant to Section
6(c)(iii)(D) hereof to and including the date when each selling Holder covered
by such Registration Statement shall have received the copies of the
supplemented or amended Prospectus contemplated by Section 6(d)(xv) hereof or
shall have received the Advice.

     The Company and the Guarantors may require each Holder of Transfer
Restricted Securities as to which any registration is being effected to furnish
to the Company such information regarding such Holder and such Holder's intended
method of distribution of the applicable Transfer Restricted Securities as the
Company may from time to time reasonably request in writing, but only to the
extent that such information is required in order to comply with the Act. Each
such Holder agrees to notify the Company as promptly as practicable of (i) any
inaccuracy or change in information previously furnished by such Holder to the
Company or (ii) the occurrence of any event, in either case, as a result of
which any Prospectus relating to such registration contains or would contain an
untrue statement of a material fact regarding such Holder or such Holder's
intended method of distribution of the applicable Transfer Restricted Securities
or omits to state any material fact regarding such Holder or such Holder's
intended method of distribution of the applicable Transfer Restricted Securities
required to be stated therein or necessary to make the statements therein not
misleading and promptly to furnish to the Company any additional information
required to correct and update any previously furnish to the Company any
additional information required to correct and update any previously furnished
information or required so that such Prospectus shall not contain, with respect
to such Holder or the distribution of the applicable Transfer Restricted
Securities an untrue statement of a material fact or omit to state a material
fact required to be stated therein or necessary to make the statements therein
not misleading.

     Notwithstanding anything herein to the contrary, any party to this
Agreement (and any employee, representative, or other agent of any party to this
Agreement) may disclose to any and all persons, without limitation of any kind,
the U.S. federal income tax treatment and tax structure of the transactions
contemplated by this Agreement (the "Transactions") and all materials of any
kind (including opinions or other tax analyses) that are provided to it relating
to such tax treatment and tax structure; provided, however, that neither party
(nor any employee, representative or other agent thereof) shall disclose any
information (a) that is not relevant to an understanding of the U.S. federal
income tax treatment or tax structure of the Transactions or (b) to the extent
such disclosure could result in a violation of any federal or state securities
laws.

SECTION 7 REGISTRATION EXPENSES

     All expenses incident to the Company's and the Guarantors' performance of
or compliance with this Agreement will be borne by the Company regardless of
whether a Registration Statement becomes effective, including without
limitation: (i) all registration and filing fees and expenses (including filings
made by any Initial Purchaser or Holder with the NASD (and, if applicable, the
fees and expenses of any "qualified independent underwriter" and its counsel
that may be required by the rules and regulations of the NASD)); (ii) all fees
and expenses of compliance with federal securities and state Blue Sky or
securities laws; (iii) all expenses of printing (including printing certificates
for the Series B Notes to be issued in the Exchange Offer and printing of
Prospectuses), messenger and delivery services; (iv) all fees and disbursements
of counsel for the Company and the Guarantors and the Holders of Transfer
Restricted Securities; and (v) all fees and disbursements of independent
certified public accountants of the Company (including the expenses of any
special audit and comfort letters required by or incident to such performance).

     The Company will, in any event, bear its and the Guarantors' internal
expenses (including, without limitation, all salaries and expenses of its
officers and employees performing legal or accounting


                                       14



duties), the expenses of any annual audit and the fees and expenses of any
Person, including special experts, retained by the Company or the Guarantors.

SECTION 8 INDEMNIFICATION

     (a) The Company and the Guarantors shall, jointly and severally, indemnify
and hold harmless each Holder of Transfer Restricted Securities, its officers
and employees and each person, if any, who controls any such Holders, within the
meaning of the Securities Act, from and against any loss, claim, damage or
liability, joint or several, or any action in respect thereof (including, but
not limited to, any loss, claim, damage, liability or action relating to
purchases, sales and registration of Notes), to which that Holder, officer,
employee or controlling person may become subject, under the Securities Act or
otherwise, insofar as such loss, claim, damage, liability or action arises out
of, or is based upon, (i) any untrue statement or alleged untrue statement of a
material fact contained (A) in any Registration Statement or Prospectus or in
any amendment or supplement thereto or (B) in any blue sky application or other
document prepared or executed by the Company or any Guarantor (or based upon any
written information furnished by the Company or any Guarantor) specifically for
the purpose of qualifying any or all of the Notes under the securities laws of
any state or other jurisdiction (any such application, document or information
being hereinafter called a "Blue Sky Application"), (ii) the omission or alleged
omission to state in any Registration Statement or Prospectus, or in any
amendment or supplement thereto, or in any Blue Sky Application any material
fact required to be stated therein or necessary to make the statements therein
not misleading or (iii) any act or failure to act or any alleged act or failure
to act by any Holder in connection with, or relating in any manner to, the Notes
or the offering contemplated hereby, and which is included as part of or
referred to in any loss, claim, damage, liability or action arising out of or
based upon matters covered by clause (i) or (ii) above (provided that the
Company and the Guarantors shall not be liable under this clause (iii) to the
extent that it is determined in a final judgment by a court of competent
jurisdiction that such loss, claim, damage, liability or action resulted
directly from any such acts or failures to act undertaken or omitted to be taken
by such Holder through its gross negligence or willful misconduct), and shall
reimburse each Holder and each such officer, employee or controlling person
promptly upon demand for any legal or other expenses reasonably incurred by that
Holder, officer, employee or controlling person in connection with investigating
or defending or preparing to defend against any such loss, claim, damage,
liability or action as such expenses are incurred; provided, however, that the
Company and the Guarantors shall not be liable in any such case to the extent
that any such loss, claim, damage, liability or action arises out of, or is
based upon, any untrue statement or alleged untrue statement or omission or
alleged omission made in any Registration Statement or Prospectus, or in any
such amendment or supplement, or in any Blue Sky Application, in reliance upon
and in conformity with written information concerning such Holder furnished to
the Company by or on behalf of any Holder specifically for inclusion therein.
The foregoing indemnity agreement is in addition to any liability which the
Company and the Guarantors may otherwise have to any Holder or to any officer,
employee or controlling person of that Holder.

     (b) Each Holder, severally and not jointly, shall indemnify and hold
harmless the Company and the Guarantors, their respective officers and
employees, each of their respective directors, and each person, if any, who
controls the Company or the Guarantors within the meaning of the Securities Act,
from and against any loss, claim, damage or liability, joint or several, or any
action in respect thereof, to which the Company, the Guarantors or any such
director, officer or controlling person may become subject, under the Securities
Act or otherwise, insofar as such loss, claim, damage, liability or action
arises out of, or is based upon, (i) any untrue statement or alleged untrue
statement of a material fact contained (A) in any Registration Statement or
Prospectus, or in any amendment or supplement thereto, or (B) in any Blue Sky
Application or (ii) the omission or alleged omission to state in any
Registration Statement or Prospectus, or in any amendment or supplement thereto,
or in any Blue Sky Application any material fact required to be stated therein
or necessary to make the statements therein not misleading, but


                                       15



in each case only to the extent that the untrue statement or alleged untrue
statement or omission or alleged omission was made in reliance upon and in
conformity with written information concerning such Holders furnished to the
Company by or on behalf of that Holder specifically for inclusion therein, and
shall reimburse the Company, the Guarantors and any such director, officer or
controlling person for any legal or other expenses reasonably incurred by the
Company, the Guarantors or any such director, officer or controlling person in
connection with investigating or defending or preparing to defend against any
such loss, claim, damage, liability or action as such expenses are incurred. The
foregoing indemnity agreement is in addition to any liability which any Holder
may otherwise have to the Company, the Guarantors or any such director, officer,
employee or controlling person. The Company and the Guarantors shall be entitled
to receive indemnities from underwriters, selling brokers, dealer managers and
similar securities industry professionals participating in the distribution of
such Registrable Securities to the same extent as provided above with respect to
information or affidavit furnished in writing by such Persons as provided
specifically for in any Prospectus or Registration Statement.

     (c) Promptly after receipt by an indemnified party under this Section 8 of
notice of any claim or the commencement of any action, the indemnified party
shall, if a claim in respect thereof is to be made against the indemnifying
party under this Section 8, notify the indemnifying party in writing of the
claim or the commencement of that action; provided, however, that the failure to
notify the indemnifying party shall not relieve it from any liability which it
may have under this Section 8 except to the extent it has been materially
prejudiced by such failure and, provided further, that the failure to notify the
indemnifying party shall not relieve it from any liability which it may have to
an indemnified party otherwise than under this Section 8. If any such claim or
action shall be brought against an indemnified party, and it shall notify the
indemnifying party thereof, the indemnifying party shall be entitled to
participate therein and, to the extent that it wishes, jointly with any other
similarly notified indemnifying party, to assume the defense thereof with
counsel reasonably satisfactory to the indemnified party. After notice from the
indemnifying party to the indemnified party of its election to assume the
defense of such claim or action, the indemnifying party shall not be liable to
the indemnified party under this Section 8 for any legal or other expenses
subsequently incurred by the indemnified party in connection with the defense
thereof other than reasonable costs of investigation; provided, however, any
indemnified party shall have the right to employ separate counsel in any such
action and to participate in the defense thereof but the fees and expenses of
such counsel shall be at the expense of the indemnified party unless (i) the
employment thereof has been specifically authorized by the indemnifying party in
writing, (ii) such indemnified party shall have been advised by such counsel
that there may be one or more legal defenses available to it which are different
from or additional to those available to the indemnifying party and in the
reasonable judgment of such counsel it is advisable for such indemnified party
to employ separate counsel or (iii) the indemnifying party has failed to assume
the defense of such action and employ counsel reasonably satisfactory to the
indemnified party, in which case, if such indemnified party notifies the
indemnifying party in writing that it elects to employ separate counsel at the
expense of the indemnifying party, the indemnifying party shall not have the
right to assume the defense of such action on behalf of such indemnified party,
it being understood, however, that the indemnifying party shall not, in
connection with any one such action or separate but substantially similar or
related actions in the same jurisdiction arising out of the same general
allegations or circumstances, be liable for the reasonable fees and expenses of
more than one separate firm of attorneys (in addition to one local counsel) at
any time for all such indemnified parties, which firm shall be designated in
writing by Lehman Brothers Inc., if the indemnified parties under this Section 8
consist of any Initial Purchaser or any of their respective officers, employees
or controlling persons, or by the Company, if the indemnified parties under this
Section consist of the Company, the Guarantors or any of their respective
directors, officers, employees or controlling persons. No indemnifying party
shall (i) without the prior written consent of the indemnified parties (which
consent shall not be unreasonably withheld), settle or compromise or consent to
the entry of any judgment with respect to any pending or threatened claim,
action, suit or proceeding in respect of which indemnification or contribution
may be sought hereunder (whether or not the indemnified parties


                                       16



are actual or potential parties to such claim or action) unless such settlement,
compromise or consent includes an unconditional release of each indemnified
party from all liability arising out of such claim, action, suit or proceeding,
or (ii) be liable for any settlement of any such action effected without its
written consent (which consent shall not be unreasonably withheld), but if
settled with the consent of the indemnifying party or if there be a final
judgment of the plaintiff in any such action, the indemnifying party agrees to
indemnify and hold harmless any indemnified party from and against any loss or
liability by reason of such settlement or judgment.

     (d) If the indemnification provided for in this Section 8 shall for any
reason be unavailable to or insufficient to hold harmless an indemnified party
under Section 8(a) or 8(b) in respect of any loss, claim, damage or liability,
or any action in respect thereof, referred to therein, then each indemnifying
party shall, in lieu of indemnifying such indemnified party, contribute to the
amount paid or payable by such indemnified party as a result of such loss,
claim, damage or liability, or action in respect thereof, (i) in such proportion
as shall be appropriate to reflect the relative benefits received by the Company
and the Guarantors, on the one hand, and the Holders on the other, from the
offering of the Notes or (ii) if the allocation provided by clause (i) above is
not permitted by applicable law, in such proportion as is appropriate to reflect
not only the relative benefits referred to in clause (i) above but also the
relative fault of the Company and the Guarantors, on the one hand and the
Holders on the other with respect to the statements or omissions which resulted
in such loss, claim, damage or liability, or action in respect thereof, as well
as any other relevant equitable considerations. The relative benefits received
by the Company and the Guarantors, on the one hand and the Holders on the other
with respect to such offering shall be deemed to be in the same proportion as
the total net proceeds from the offering of the Series A Notes purchased under
the Purchase Agreement (before deducting expenses) received by the Company and
the Guarantors, on the one hand, and the total discounts and commissions
received by the Holders with respect to the Series A Notes purchased under this
Agreement, on the other hand, bear to the total gross proceeds from the offering
of the Series A Notes under the Purchase Agreement. The relative fault shall be
determined by reference to whether the untrue or alleged untrue statement of a
material fact or omission or alleged omission to state a material fact relates
to information supplied by the Company, the Guarantors or the Holders, the
intent of the parties and their relative knowledge, access to information and
opportunity to correct or prevent such statement or omission. The Company, the
Guarantors and the Holders agree that it would not be just and equitable if
contributions pursuant to this Section 8(d) were to be determined by pro rata
allocation (even if the Holders were treated as one entity for such purpose) or
by any other method of allocation which does not take into account the equitable
considerations referred to herein. The amount paid or payable by an indemnified
party as a result of the loss, claim, damage or liability, or action in respect
thereof, referred to above in this Section shall be deemed to include, for
purposes of this Section 8(d), any legal or other expenses reasonably incurred
by such indemnified party in connection with investigating or defending any such
action or claim. Notwithstanding the provisions of this Section 8(d), no Holder
shall be required to contribute any amount in excess of the amount by which the
net proceeds received by it in connection with its sale of Notes exceeds the
amount of any damages which such Holder has otherwise paid or become liable to
pay by reason of any untrue or alleged untrue statement or omission or alleged
omission. No person guilty of fraudulent misrepresentation (within the meaning
of Section 11(f) of the Securities Act) shall be entitled to contribution from
any person who was not guilty of such fraudulent misrepresentation. The Holders'
obligations to contribute as provided in this Section 8(d) are several and not
joint.

SECTION 9 RULE 144A

     The Company and each Guarantor hereby agrees with each Holder of Transfer
Restricted Securities, during any period in which the Company or such Guarantor
is not subject to Section 13 or 15(d) of the Exchange Act within the two-year
period following the Closing Date, to make available to any Holder or beneficial
owner of Transfer Restricted Securities, in connection with any sale thereof and


                                       17



any prospective purchaser of such Transfer Restricted Securities from such
Holder or beneficial owner, the information required by Rule 144A(d)(4) under
the Act in order to permit resales of such Transfer Restricted Securities
pursuant to Rule 144A.

SECTION 10 PARTICIPATION IN UNDERWRITTEN REGISTRATIONS

     No Holder may participate in any Underwritten Registration hereunder unless
such Holder (a) agrees to sell such Holder's Transfer Restricted Securities on
the basis provided in any underwriting arrangements approved by the Persons
entitled hereunder to approve such arrangements and (b) completes and executes
all reasonable questionnaires, powers of attorney, indemnities, underwriting
agreements, lock-up letters and other documents required under the terms of such
underwriting arrangements.

SECTION 11 SELECTION OF UNDERWRITERS

     The Holders of Transfer Restricted Securities covered by the Shelf
Registration Statement who desire to do so may sell such Transfer Restricted
Securities in an Underwritten Offering at such Holders' expense. In any such
Underwritten Offering, the investment banker or investment bankers and manager
or managers that will administer the offering will be selected by the Holders of
a majority in aggregate principal amount of the Transfer Restricted Securities
included in such offering; provided, that such investment bankers and managers
must be reasonably satisfactory to the Company.

SECTION 12 MISCELLANEOUS

     (a) Remedies. The Company and the Guarantors agree that monetary damages
(including the additional interest contemplated hereby) would not be adequate
compensation for any loss incurred by reason of a breach by it of the provisions
of this Agreement and hereby agree to waive the defense in any action for
specific performance that a remedy at law would be adequate.

     (b) No Inconsistent Agreements. Neither the Company nor any Guarantor will,
on or after the date of this Agreement, enter into any agreement with respect to
its securities that is inconsistent with the rights granted to the Holders in
this Agreement or otherwise conflicts with the provisions hereof. Except as
disclosed in the Offering Memorandum or in the documents incorporated therein by
reference, neither the Company nor any Guarantor has previously entered into any
agreement granting any registration rights with respect to its securities to any
Person that is inconsistent with the terms of this Agreement. The rights granted
to the Holders hereunder do not in any way conflict with and are not
inconsistent with the rights granted to the holders of the Company's or any
Guarantor's securities under any agreement in effect on the date hereof.

     (c) Adjustments Affecting the Notes. The Company and the Guarantors will
not take any action, or permit any change to occur, with respect to the Notes
that would materially and adversely affect the ability of the Holders to
Consummate any Exchange Offer.

     (d) Amendments and Waivers. The provisions of this Agreement may not be
amended, modified or supplemented, and waivers or consents to or departures from
the provisions hereof may not be given unless the Company has obtained the
written consent of Holders of a majority of the outstanding principal amount of
Transfer Restricted Securities. Notwithstanding the foregoing, a waiver or
consent to departure from the provisions hereof that relates exclusively to the
rights of Holders whose securities are being tendered pursuant to the Exchange
Offer and that does not affect directly or indirectly the rights of other
Holders whose securities are not being tendered pursuant to such Exchange Offer
may be given by


                                       18



the Holders of a majority of the outstanding principal amount of Transfer
Restricted Securities being tendered or registered.

     (e) Notices. All notices and other communications provided for or permitted
hereunder shall be made in writing by hand-delivery, first-class mail
(registered or certified, return receipt requested), telex, telecopier, or air
courier guaranteeing overnight delivery:

          (i) if to a Holder, at the address set forth on the records of the
     Registrar under the Indenture, with a copy to the Registrar under the
     Indenture; and

          (ii) if to the Company or the Guarantors:

               L-3 Communications Corporation
               600 Third Avenue, 34th Floor,
               New York, New York 10016,
               Attention: Christopher C. Cambria (Fax: 212-805-5494),

               With a copy to:

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

     All such notices and communications 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
answered back, if telexed; when receipt acknowledged, if telecopied; and on the
next business day, if timely delivered to an air courier guaranteeing overnight
delivery.

     Copies of all such notices, demands or other communications shall be
concurrently delivered by the Person giving the same to the Trustee at the
address specified in the Indenture.

     (f) Successors and Assigns. This Agreement shall inure to the benefit of
and be binding upon the successors and assigns of each of the parties, including
without limitation and without the need for an express assignment, subsequent
Holders; provided, however, that this Agreement shall not inure to the benefit
of or be binding upon a successor or assign of a Holder unless and to the extent
such successor or assign acquired Transfer Restricted Securities from such
Holder.

     (g) Counterparts. This Agreement may be executed in any number of
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

     (h) Headings. The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

     (i) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

     (j) Severability. In the event that any one or more of the provisions
contained herein, or the application thereof in any circumstance, is held
invalid, illegal or unenforceable, the validity, legality and enforceability of
any such provision in every other respect and of the remaining provisions
contained herein shall not be affected or impaired thereby.


                                       19



     (k) Entire Agreement. This Agreement together with the other Operative
Documents (as defined in the Purchase Agreement) is intended by the parties as a
final expression of their agreement and intended to be a complete and exclusive
statement of the agreement and understanding of the parties hereto in respect of
the subject matter contained herein. There are no restrictions, promises,
warranties or undertakings, other than those set forth or referred to herein
with respect to the registration rights granted by the Company and the
Guarantors with respect to the Transfer Restricted Securities. This Agreement
supersedes all prior agreements and understandings between the parties with
respect to such subject matter.

                            [Signature pages follow]


                                       20



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

L-3 COMMUNICATIONS CORPORATION


By: /s/ Christopher C. Cambria
    ----------------------------------------------
Name:  Christopher C. Cambria
Title: Senior Vice President, Secretary and General Counsel

APCOM, INC.
BROADCAST SPORTS INC.
D.P. ASSOCIATES INC.
ELECTRODYNAMICS, INC.
HENSCHEL INC.
HYGIENETICS ENVIRONMENTAL SERVICES, INC.
INTERSTATE ELECTRONICS CORPORATION
KDI PRECISION PRODUCTS, INC.
L-3 COMMUNICATIONS AEROMET, INC.
L-3 COMMUNICATIONS VERTEX AEROSPACE LLC
L-3 COMMUNICATIONS ADVANCED LASER SYSTEMS TECHNOLOGY, INC.
L-3 COMMUNICATIONS AIS GP CORPORATION
L-3 COMMUNICATIONS AVIONICS SYSTEMS, INC.
L-3 COMMUNICATIONS AVISYS CORPORATION
L-3 COMMUNICATIONS CE HOLDINGS, INC.
L-3 COMMUNICATIONS CINCINNATI ELECTRONICS CORPORATION
L-3 COMMUNICATIONS CSI, INC.
L-3 COMMUNICATIONS AYDIN CORPORATION
L-3 COMMUNICATIONS ELECTRON TECHNOLOGIES, 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 INFRARED VISION TECHNOLOGY CORPORATION
L-3 COMMUNICATIONS INVESTMENTS INC.
L-3 COMMUNICATIONS KLEIN ASSOCIATES, INC.
L-3 COMMUNICATIONS MAS (US) CORPORATION
L-3 COMMUNICATIONS MOBILE VISION, INC.
L-3 COMMUNICATIONS SECURITY AND DETECTION SYSTEMS, INC.
L-3 COMMUNICATIONS SONOMA EO, INC.
L-3 COMMUNICATIONS VECTOR INTERNATIONAL AVIATION LLC
L-3 COMMUNICATIONS WESTWOOD CORPORATION
MCTI ACQUISITION CORPORATION
MICRODYNE COMMUNICATIONS TECHNOLOGIES INCORPORATED
MICRODYNE CORPORATION
MICRODYNE OUTSOURCING INCORPORATED
MPRI, INC.
PAC ORD INC.
POWER PARAGON, INC.

             SENIOR SUBORDINATED NOTES REGISTRATION RIGHTS AGREEMENT



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
WOLF COACH, INC.,
       as Guarantors


By: /s/ Christopher C. Cambria
    ----------------------------------------------
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: /s/ Christopher C. Cambria
    ----------------------------------------------
Name:  Christopher C. Cambria
Title: Director

             SENIOR SUBORDINATED NOTES REGISTRATION RIGHTS AGREEMENT



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

                                        LEHMAN BROTHERS INC.
                                        BANC OF AMERICA SECURITIES LLC
                                        BEAR, STEARNS & CO. INC.
                                        CREDIT SUISSE FIRST BOSTON LLC
                                        For themselves and as representatives
                                        of the several Initial Purchasers

                                             By: LEHMAN BROTHERS INC.


                                             By: /s/ Steve Mehos
                                                 -------------------------------
                                                 Authorized Representative

             SENIOR SUBORDINATED NOTES REGISTRATION RIGHTS AGREEMENT