Document:

SUPPLEMENTAL INDENTURE TO BE DELIVERED
		
	 

	 
		BY GUARANTEEING SUBSIDIARIES
	 

	 
		Supplemental Indenture (this
		“Supplemental Indenture”), dated as of May 1, 2007, among L-3
		Communications Holdings, Inc. (or its permitted successor), a Delaware
		corporation (the “Company”), each a direct or indirect subsidiary of
		the Company signatory hereto (each, a “Guaranteeing Subsidiary”, and
		collectively, the “Guaranteeing Subsidiaries”), and The Bank of New
		York, as trustee under the indenture referred to below (the
		“Trustee”).
	 

	 
		W
		I T
		N E
		S S
		E T
		H
	 

	 
		WHEREAS, the Company has heretofore executed
		and delivered to the Trustee an indenture (the “Indenture”), dated as
		of July 29, 2005 providing for the issuance of up to $700,000,000 of 3.0%
		Convertible Contingent Debt Securities (CODES) due 2035 (the
		“CODES”);
	 

	 
		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 CODES and the Indenture on
		the terms and conditions set forth herein (the “Subsidiary
		Guarantee”); and 
	 

	 
		WHEREAS, pursuant to the Indenture, the
		parties hereto are authorized to execute and deliver this Supplemental
		Indenture and the Trustee has determined that this Supplemental Indenture is in
		form satisfactory to it.
	 

	 
		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
		CODES 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 CODES
				  (collectively, the “Guarantors” and each, a “Guarantor”),
				  unconditionally guarantees to each Holder of a CODE 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 CODES or the Obligations
				  of the Company under the Indenture or the CODES, that:
				

			 

 

	 
			
				
				   
				

			 	
				
				  (xxi)
				

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

			 

 

	 
		 
	 

	 
		 
	 

	 
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				  (xxii)
				

			 	
				
				  in case of any extension of time for
				  payment or renewal of any CODES 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 A to the Indenture shall be endorsed by an Officer of such
				  Guaranteeing Subsidiary on each CODE 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 CODE 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 CODE on which a Subsidiary
				  Guarantee is endorsed, the Subsidiary Guarantee shall be valid
				  nevertheless.
				

			 

 

	 
			
				
				   
				

			 	
				
				  (d)
				

			 	
				
				  The delivery of any CODE 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, to the extent permitted by
				  applicable law, be unconditional, regardless of the validity, regularity or
				  enforceability of the CODES or the Indenture, the absence of any action to
				  enforce the same, any waiver or consent by any Holder of the CODES 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 Guaranteeing Subsidiary, to the
				  extent permitted by applicable law, 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
				  
				

			 

 

	 
		 
	 

	 
		 
	 

	 
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		Subsidiary Guarantee made pursuant to this
		Supplemental Indenture will not be discharged except by complete performance of
		the Obligations contained in the CODES 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:
				

			 

 

	 
			
				
				   
				

			 	
				
				  (xxiii)
				

			 	
				
				  the maturity of the Obligations
				  guaranteed hereby may be accelerated as provided in Article 4 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; 
				

			 

 

	 
			
				
				   
				

			 	
				
				  (xxiv)
				

			 	
				
				  in the event of any declaration of
				  acceleration of such Obligations as provided in Article 4 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; and
				

			 

 

	 
			
				
				   
				

			 	
				
				  (xxv)
				

			 	
				
				  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.
				

			 

 

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

	 
			
				
				   
				

			 	
				
				  (a)
				

			 	
				
				  Except as set forth in Articles 6
				  and 9 of the Indenture, nothing contained in the Indenture, this Supplemental
				  Indenture or in the CODES shall prevent (i) any consolidation or merger of any
				  Guaranteeing Subsidiary with or into the Company or any other Guarantor, (ii)
				  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 or (iii) any merger of a Guarantor with or into with an Affiliate of
				  that Guarantor that has not significant assets or liabilities and was
				  incorporated solely for the purpose of reincorporating such Guarantor in
				  another State of the United States so long as the amount of
				

			 

 

	 
		 
	 

	 
		 
	 

	 
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		 Indebtedness of the Company and the
		domestic non-Guarantor subsidiaries is not increased thereby.
	 

	 
			
				
				   
				

			 	
				
				  (b)
				

			 	
				
				  Except as set forth in Article 9 of
				  the Indenture, nothing contained in the Indenture, this Supplemental Indenture
				  or in the CODES shall prevent any consolidation or merger of any Guaranteeing
				  Subsidiary with or into any Person organized under the laws of the United
				  States of America, any state thereof, the District of Columbia or any territory
				  thereof 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 any Person organized under the laws of the United States of
				  America, any state thereof, the District of Columbia or any territory thereof
				  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 any Person formed by
				  such consolidation, or into which such Guaranteeing Subsidiary shall have been
				  merged, or by any Person which shall have acquired such property, (ii)
				  immediately after giving effect to such consolidation, merger, sale or
				  conveyance no Default or Event of Default exists and (iii) such transaction
				  will only be permitted under the Indenture if it would be permitted under the
				  terms of all of the indentures governing the Outstanding Senior Subordinated
				  Notes as the same are in effect on the date of the Indenture (whether or not
				  those indentures are subsequently amended, waived, modified or terminated or
				  expire and whether or not any of these notes continue to be
				  outstanding).
				

			 

 

	 
			
				
				   
				

			 	
				
				  (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
				  Person 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 Person thereupon may cause to be signed any or all
				  of the Subsidiary Guarantees to be endorsed upon the CODES issuable under the
				  Indenture which theretofore shall not have been signed by the Company and
				  delivered to the Trustee. All the Subsidiary Guarantees so issued shall in all
				  respects have the same legal rank and 
				

			 

 

	 
		 
	 

	 
		 
	 

	 
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		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. If the assets sold in such sale or other disposition
				  (including by way of merger or consolidation) 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. 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, 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 (including Contingent Interest and Additional Interest, if any)
				  on the CODES 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 Excluded Subsidiary in accordance with the terms
				  of the Indenture and the indentures governing the Outstanding Senior
				  Subordinated Notes as the same are in effect on the date of the Indenture
				  (whether or not those indentures are subsequently amended, waived, modified or
				  terminated or expire and whether or not any of those notes continue to be
				  outstanding), such Guaranteeing Subsidiary shall be released and relieved of
				  all 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
				  Company in accordance with the provisions of the Indenture and the indentures
				  governing , the Outstanding Senior Subordinated Notes as the same are in effect
				  on the date of the Indenture (whether or not those indentures are subsequently
				  amended, waived, modified or terminated or expire and whether or not any of
				  those notes continue to be outstanding), 
				

			 

 

	 
		 
	 

	 
		 
	 

	 
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		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 CODES and for the other obligations of any Guaranteeing Subsidiary under
		the Indenture as provided herein.
	 

	 
			
				
				   
				

			 	
				
				  (c)
				

			 	
				
				  Upon any Guarantor being released
				  from its guarantees of, and all pledges and security interests granted in
				  connection with, Indebtedness of the Company or any of its Subsidiaries (other
				  than a Foreign Subsidiary), such Guarantor shall be released and relieved of
				  its obligations under this Supplemental Indenture.
				

			 

 

	 
		6. NO RECOURSE AGAINST OTHERS. No past,
		present or future director, officer, employee, incorporator, stockholder or
		agent of any Guaranteeing Subsidiary, as such, shall have any liability for any
		obligations of the Company or any Guaranteeing Subsidiary under the CODES, 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 CODES by accepting a CODE waives and releases all
		such liability. The waiver and release are part of the consideration for
		issuance of the CODES. 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. SUBORDINATION OF SUBSIDIARY GUARANTEES;
		ANTI-LAYERING. 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. No Indebtedness shall be deemed to be subordinated or junior in
		right of payment to any other Indebtedness solely by virtue of being
		unsecured.
	 

	 
		8. 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.
	 

	 
		 
	 

	 
		 
	 

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

	 
		 
	 

	 
			
				
				  Dated: May 1, 2007
				

			 	
				
				   
				

			 	
				
				  L-3 COMMUNICATIONS HOLDINGS,
				  INC.
				

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				

			 
	
				
				   
				

			 	
				
				   
				

			 	
				
				   
				

			 	
				
				  Name: Christopher C.
				  Cambria
 Title: Senior Vice
				  President
				

			 

 

	 
		 
	 

	 
		 
	 

	 
		 
	 

	 
	 

	 

	 
		Dated: May 1, 2007
	 

	 
		Apcom, Inc., a Maryland corporation
	 

	 
		Broadcast Sports Inc., a Delaware
		corporation
	 

	 
		D.P. Associates, Inc., a Virginia
		corporation
	 

	 
		Electrodynamics, Inc., an Arizona
		corporation
	 

	 
		gForce Technologies, Inc., a Massachusetts
		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
	 

	 
		LinCom Wireless, Inc., a Delaware
		corporation
	 

	 
		L-3 Communications Advanced Laser Systems
		Technology, Inc., a Florida corporation
	 

	 
		L-3 Communications Aeromet, Inc., an Oregon
		corporation
	 

	 
		L-3 Communications AIS GP Corporation, a
		Delaware corporation
	 

	 
		L-3 Communications Applied Signal and Image
		Technology, Inc., a Maryland corporation
	 

	 
		L-3 Communications Avionics Systems, Inc., a
		Delaware corporation
	 

	 
		L-3 Communications Avisys Corporation, a
		Texas corporation
	 

	 
		L-3 Communications Aydin Corporation, a
		Delaware corporation
	 

	 
		L-3 Communications CE Holdings, Inc., a
		Delaware corporation 
	 

	 
		L-3 Communications Cincinnati Electronics,
		Inc., an Ohio corporation
	 

	 
		L-3 Communications Crestview Aerospace
		Corporation, a Delaware corporation
	 

	 
		L-3 Communications CSI, Inc., a California
		corporation
	 

	 
		L-3 Communications CyTerra Corporation, a
		Delaware corporation
	 

	 
		L-3 Communications Dynamic Positioning and
		Control Systems, Inc., a California corporation
	 

	 
		L-3 Communications Electron Technologies,
		Inc., a Delaware corporation
	 

	 
		L-3 Communications EO/IR, Inc., a Florida
		corporation
	 

	 
		L-3 Communications EOTech, Inc., a Delaware
		corporation
	 

	 
		L-3 Communications ESSCO, Inc., a Delaware
		corporation
	 

	 
		L-3 Communications Foreign Holdings, Inc., a
		Delaware corporation
	 

	 
		L-3 Communications Geneva Aerospace, Inc., a
		Texas corporation
	 

	 
		L-3 Communications Government Services,
		Inc., a Virginia corporation
	 

	 
		L-3 Communications ILEX Systems, Inc., a
		Delaware corporation
	 

	 
		L-3 Communications InfraredVision Technology
		Corporation, a California corporation
	 

	 
		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 MariPro, Inc., a
		California corporation
	 

	 
		L-3 Communications Mobile-Vision, Inc., a
		New Jersey corporation 
	 

	 
		L-3 Communications Nautronix Holdings, Inc.,
		a Delaware corporation
	 

	 
		L-3 Communications Nova Engineering, Inc.,
		an Ohio corporation
	 

	 
		L-3 Communications SafeView, Inc., a
		Delaware corporation
	 

	 
		L-3 Communications Security and Detection
		Systems, Inc., a Delaware corporation
	 

	 
		L-3 Communications Sonoma EO, Inc., a
		California corporation
	 

	 
		L-3 Communications SSG-Tinsley, Inc., a
		Delaware corporation
	 

	 
		L-3 Communications TCS, Inc., a Delaware
		corporation
	 

	 
		L-3 Communications Tinsley Laboratories,
		Inc., a California corporation
	 

	 
		L-3 Communications Titan Corporation, a
		Delaware 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
	 

	 
		SPD Electrical Systems, Inc., a Delaware
		corporation
	 

	 
		SPD Switchgear Inc., a Delaware
		corporation
	 

	 
		SYColeman Corporation, a Florida
		corporation
	 

	 
		Titan Facilities, Inc., a Virginia
		corporation
	 

	 
		Troll Technology Corporation, a California
		corporation
	 

	 
		Wescam Air Ops Inc., a Delaware
		corporation
	 

	 
		Wescam Holdings (US) Inc., a Delaware
		corporation
	 

	 
		Wolf Coach, Inc., a Massachusetts
		corporation
	 

	 
		 
	 

	 
			
				
				   
				

			 	
				
				   
				

			 	
				
				  As Guaranteeing Subsidiaries
				

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				

			 
	
				
				   
				

			 	
				
				   
				

			 	
				
				   
				

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

			 

 

	 
		 
	 

	 
		L-3 Communications Integrated Systems L.P.,
		a Delaware limited partnership
	 

	 
		 
	 

	 
			
				
				   
				

			 	
				
				   
				

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

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				   
				

			 
	
				
				   
				

			 	
				
				   
				

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

			 

 

	 
		 
	 

	 
		L-3 Communications Flight Capital LLC, a
		Delaware limited liability company
	 

	 
		L-3 Communications Flight International
		Aviation LLC, a Delaware limited liability company
	 

	 
		L-3 Communications Vector International
		Aviation LLC, a Delaware limited liability company
	 

	 
		 
	 

	 
			
				
				   
				

			 	
				
				   
				

			 	
				
				  By: L-3 COMMUNICATIONS VERTEX
				  AEROSPACE LLC, as Sole Member
 
 By:
				  L-3 COMMUNICATIONS INTEGRATED SYSTEMS L.P., as Sole Member
 

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

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				   
				

			 
	
				
				   
				

			 	
				
				   
				

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

			 

 

	 
		 
	 

	 
		 
	 

	 
		 
	 

	 
	 

	 

	 
		L-3 Communications Vertex Aerospace LLC, a
		Delaware limited liability company
	 

	 
		 
	 

	 
			
				
				   
				

			 	
				
				   
				

			 	
				
				  By: L-3 COMMUNICATIONS INTEGRATED
				  SYSTEMS L.P., as Sole Member
 
 By:
				  L-3 COMMUNICATIONS AIS GP CORPORATION, as General Partner
				

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				   
				

			 
	
				
				   
				

			 	
				
				   
				

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

			 

 

	 
		 
	 

	 
		Wescam Air Ops LLC, a Delaware limited
		liability company
	 

	 
		 
	 

	 
			
				
				   
				

			 	
				
				   
				

			 	
				
				  By: L-3 COMMUNICATIONS EO/IR, INC.,
				  as Sole Member
				

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				   
				

			 
	
				
				   
				

			 	
				
				   
				

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

			 

 

	 
		 
	 

	 
		Wescam LLC, a Delaware limited liability
		company
	 

	 
		 
	 

	 
			
				
				   
				

			 	
				
				   
				

			 	
				
				  By: L-3 COMMUNICATIONS CORPORATION,
				  as Sole Member
				

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				   
				

			 
	
				
				   
				

			 	
				
				   
				

			 	
				
				  Name: Christopher C. Cambria
				  
 Title: Senior Vice President
				

			 

 

	 
		 
	 

	 
		L-3 Communications Germany Holdings, LLC, a
		Delaware limited liability company
	 

	 
		 
	 

	 
			
				
				   
				

			 	
				
				   
				

			 	
				
				  By: L-3 COMMUNICATIONS CORPORATION,
				  as Sole Member
				

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				   
				

			 
	
				
				   
				

			 	
				
				   
				

			 	
				
				  Name: Christopher C.
				  Cambria
 Title: Senior Vice
				  President
				

			 

 

	 
		 
	 

	 
		 
	 

	 
	 

	 

	 
		 
	 

	 
			
				
				  Dated: May 1, 2007
				

			 	
				
				   
				

			 	
				
				  THE BANK OF NEW YORK,

				  as Trustee
				

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				

			 
	
				
				   
				

			 	
				
				   
				

			 	
				
				   
				

			 	
				
				  Name: 

				  Title: Assistant Vice President
				

			 

 

	 
		 
	 

	 
		 
	 

	 
		 
	 

	 
	 

	 

	 
		NOTATION ON SENIOR SUBORDINATED NOTE
		RELATING TO SUBSIDIARY GUARANTEE
	 

	 
		Pursuant to the Supplemental Indenture (the
		“Supplemental
		Indenture”) dated as of May 1,
		2007 among L-3 Communications Holdings, Inc., 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 interest (including Contingent Interest and Additional
		Interest, if any) on the CODES, 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 interest (including
		Contingent Interest and Additional Interest, if any) on the CODES, and (c) in
		case of any extension of time of payment or renewal of any CODES 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). This Guarantee is subordinated to
		the Senior Debt of each Guarantor to extent set forth in Article 13 of the
		Indenture.
	 

	 
		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 Guarantor,
		as such, shall have any liability for any Obligations of the Company or any
		Guarantor under the CODES, 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 CODE 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
		CODE upon which the Subsidiary Guarantee is noted has been executed by the
		Trustee under the Indenture by the manual signature of one of its authorized
		officers. Capitalized terms used herein have the meaning assigned to them in
		the Indenture, dated as of July 29, 2005, among L-3 Communications Holdings,
		Inc., the Guarantors party thereto and the Trustee.
	 

	 
		 
	 

	 
		 
	 

	 
	 

	 

	 
			
				
				  Dated: May 1, 2007
				

			 

 

	 
		Apcom, Inc., a Maryland corporation
	 

	 
		Broadcast Sports Inc., a Delaware
		corporation
	 

	 
		D.P. Associates, Inc., a Virginia
		corporation
	 

	 
		Electrodynamics, Inc., an Arizona
		corporation
	 

	 
		gForce Technologies, Inc., a Massachusetts
		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
	 

	 
		LinCom Wireless, Inc., a Delaware
		corporation
	 

	 
		L-3 Communications Advanced Laser Systems
		Technology, Inc., a Florida corporation
	 

	 
		L-3 Communications Aeromet, Inc., an Oregon
		corporation
	 

	 
		L-3 Communications AIS GP Corporation, a
		Delaware corporation
	 

	 
		L-3 Communications Applied Signal and Image
		Technology, Inc., a Maryland corporation
	 

	 
		L-3 Communications Avionics Systems, Inc., a
		Delaware corporation
	 

	 
		L-3 Communications Avisys Corporation, a
		Texas corporation
	 

	 
		L-3 Communications Aydin Corporation, a
		Delaware corporation
	 

	 
		L-3 Communications CE Holdings, Inc., a
		Delaware corporation 
	 

	 
		L-3 Communications Cincinnati Electronics,
		Inc., an Ohio corporation
	 

	 
		L-3 Communications Crestview Aerospace
		Corporation, a Delaware corporation
	 

	 
		L-3 Communications CSI, Inc., a California
		corporation
	 

	 
		L-3 Communications CyTerra Corporation, a
		Delaware corporation
	 

	 
		L-3 Communications Dynamic Positioning and
		Control Systems, Inc., a California corporation
	 

	 
		L-3 Communications Electron Technologies,
		Inc., a Delaware corporation
	 

	 
		L-3 Communications EO/IR, Inc., a Florida
		corporation
	 

	 
		L-3 Communications EOTech, Inc., a Delaware
		corporation
	 

	 
		L-3 Communications ESSCO, Inc., a Delaware
		corporation
	 

	 
		L-3 Communications Foreign Holdings, Inc., a
		Delaware corporation
	 

	 
		L-3 Communications Geneva Aerospace, Inc., a
		Texas corporation
	 

	 
		L-3 Communications Government Services,
		Inc., a Virginia corporation
	 

	 
		L-3 Communications ILEX Systems, Inc., a
		Delaware corporation
	 

	 
		L-3 Communications InfraredVision Technology
		Corporation, a California corporation
	 

	 
		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 MariPro, Inc., a
		California corporation
	 

	 
		L-3 Communications Mobile-Vision, Inc., a
		New Jersey corporation 
	 

	 
		L-3 Communications Nautronix Holdings, Inc.,
		a Delaware corporation
	 

	 
		L-3 Communications Nova Engineering, Inc.,
		an Ohio corporation
	 

	 
		L-3 Communications SafeView, Inc., a
		Delaware corporation
	 

	 
		L-3 Communications Security and Detection
		Systems, Inc., a Delaware corporation
	 

	 
		L-3 Communications Sonoma EO, Inc., a
		California corporation
	 

	 
		L-3 Communications SSG-Tinsley, Inc., a
		Delaware corporation
	 

	 
		L-3 Communications TCS, Inc., a Delaware
		corporation
	 

	 
		L-3 Communications Tinsley Laboratories,
		Inc., a California corporation
	 

	 
		L-3 Communications Titan Corporation, a
		Delaware 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
	 

	 
		SPD Electrical Systems, Inc., a Delaware
		corporation
	 

	 
		SPD Switchgear Inc., a Delaware
		corporation
	 

	 
		SYColeman Corporation, a Florida
		corporation
	 

	 
		Titan Facilities, Inc., a Virginia
		corporation
	 

	 
		Troll Technology Corporation, a California
		corporation
	 

	 
		Wescam Air Ops Inc., a Delaware
		corporation
	 

	 
		Wescam Holdings (US) Inc., a Delaware
		corporation
	 

	 
		Wolf Coach, Inc., a Massachusetts
		corporation
	 

	 
		 
	 

	 
			
				
				   
				

			 	
				
				   
				

			 	
				
				  As Guaranteeing Subsidiaries
				

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				

			 
	
				
				   
				

			 	
				
				   
				

			 	
				
				   
				

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

			 

 

	 
		 
	 

	 
		L-3 Communications Integrated Systems L.P.,
		a Delaware limited partnership
	 

	 
		 
	 

	 
			
				
				   
				

			 	
				
				   
				

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

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				   
				

			 
	
				
				   
				

			 	
				
				   
				

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

			 

 

	 
		 
	 

	 
		L-3 Communications Flight Capital LLC, a
		Delaware limited liability company
	 

	 
		L-3 Communications Flight International
		Aviation LLC, a Delaware limited liability company
	 

	 
		L-3 Communications Vector International
		Aviation LLC, a Delaware limited liability company
	 

	 
		 
	 

	 
			
				
				   
				

			 	
				
				   
				

			 	
				
				  By: L-3 COMMUNICATIONS VERTEX
				  AEROSPACE LLC, as Sole Member
 
 By:
				  L-3 COMMUNICATIONS INTEGRATED SYSTEMS L.P., as Sole Member
 

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

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				   
				

			 
	
				
				   
				

			 	
				
				   
				

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

			 

 

	 
		 
	 

	 
		 
	 

	 
	 

	 

	 
		L-3 Communications Vertex Aerospace LLC, a
		Delaware limited liability company
	 

	 
		 
	 

	 
			
				
				   
				

			 	
				
				   
				

			 	
				
				  By: L-3 COMMUNICATIONS INTEGRATED
				  SYSTEMS L.P., as Sole Member
 
 By:
				  L-3 COMMUNICATIONS AIS GP CORPORATION, as General Partner
				

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				   
				

			 
	
				
				   
				

			 	
				
				   
				

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

			 

 

	 
		 
	 

	 
		Wescam Air Ops LLC, a Delaware limited
		liability company
	 

	 
		 
	 

	 
			
				
				   
				

			 	
				
				   
				

			 	
				
				  By: L-3 COMMUNICATIONS EO/IR, INC.,
				  as Sole Member
				

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				   
				

			 
	
				
				   
				

			 	
				
				   
				

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

			 

 

	 
		 
	 

	 
		Wescam LLC, a Delaware limited liability
		company
	 

	 
		 
	 

	 
			
				
				   
				

			 	
				
				   
				

			 	
				
				  By: L-3 COMMUNICATIONS CORPORATION,
				  as Sole Member
				

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				   
				

			 
	
				
				   
				

			 	
				
				   
				

			 	
				
				  Name: Christopher C. Cambria
				  
 Title: Senior Vice President
				

			 

 

	 
		 
	 

	 
		L-3 Communications Germany Holdings, LLC, a
		Delaware limited liability company
	 

	 
		 
	 

	 
			
				
				   
				

			 	
				
				   
				

			 	
				
				  By: L-3 COMMUNICATIONS CORPORATION,
				  as Sole Member
				

			 
	
				
				

			 	
				
				   
				

			 	
				
				  
 By: 
				

			 	
				
				   
				

			 
	
				
				   
				

			 	
				
				   
				

			 	
				
				  Name: Christopher C.
				  Cambria
 Title: Senior Vice
				  Presidentexv10w2

 

INTERNATIONAL GAME TECHNOLOGY

Exhibit 10.2 to Form 10Q for period ended March 31, 2007

Summary of Named Executive Officer and Director Compensation Arrangements

Executive Officers

In addition to the base salaries noted in the table below, compensation arrangements for our
executive officers include benefits paid under any applicable employment contracts, other IGT Plans
for Management Bonus (including Cash Sharing), Stock Incentives, Profit Sharing, and Deferred
Compensation as more fully described in exhibits to our annual report on Form 10-K. These
individuals also receive certain perquisites as explained in our annual proxy statement. Except
where noted that employment contracts have been filed as exhibits, these are at-will employment
arrangements.

	 	 	 	 	 
	 	 	 	 	Base
	Name	 	Title	 	Salary (1)
	Thomas J. Matthews (2)
	 	President, Chief Executive Officer and Chief Operating Officer	 	$800,000
	Maureen T. Mullarkey(2)
	 	Executive Vice President, Chief Financial Officer and Treasurer	 	$500,000
	Stephen W. Morro
	 	President, North America Gaming Division	 	$500,000
	David D. Johnson
	 	Executive Vice President, Operations	 	$500,000
	Robert A. Bittman
	 	Executive Vice President, Product Strategy	 	$400,000

 

			
	(1)	 	Amounts reported in our proxy statement may vary depending on the timing of pay period
during the fiscal year
	 
	(2)	 	Employment contracts have been filed in separate exhibits to our most recent annual report on
Form 10-K

Directors

Non-employee directors receive an annual fee of $50,000 and $1,500 for each committee meeting
attended. Additionally, each non-employee director receives non-qualified stock options to
purchase 40,000 shares of common stock upon his or her initial election to the board of directors
at an exercise price equal to the closing price of the common stock on the date of grant. Every
year thereafter, each non-employee director receives non-qualified stock options to purchase 24,000
shares of common stock upon his or her re-election to the board at an exercise price equal to the
closing price of the common stock on the date of grant. Stock option grants to non-employee
directors vest in three equal annual installments. Directors who are also executive officers do
not receive any fees or additional remuneration to serve on our board or its committees.

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