Exhibit 21

L-3 Communications Holdings, Inc. And Subsidiaries
As of December 31, 2005


Name				Jurisdiction
L-3 Communications Holdings, Inc.				Delaware
L-3 Communications Corporation				Delaware
6292151 Canada Inc.				Canada
L-3 Communications Electronic Systems Inc.				Canada
Aviation Communications & Surveillance Systems, LLC*				Delaware
ACSS – NZSC Limited *				New Zealand
Honeywell TCAS Inc.*				Delaware
C3-ilex, LLC*				California
Electrodynamics, Inc.				Arizona
Henschel Inc.				Delaware
Hygienetics Environmental Services, Inc.				Delaware
Interstate Electronics Corporation				California
KDI Precision Products, Inc.				Delaware
L-3 Canada Acquisition Inc.				Canada
Wescam Inc.				Canada
Film Europe Limited*				Belgium
Mosaic Mapping Inc.*				Canada
New Vision Group Inc.*				Florida
Wescam Asia Pte Ltd.*				Singapore
Wescam Europe Limited				United Kingdom
Wescam Financial (U.S.A.) LLC				Delaware
L-3 Communications Advanced Laser Systems Technology, Inc.				Florida
L-3 Communications Aeromet, Inc.				Oregon
L-3 Communications AIS GP Corporation				Delaware
L-3 Communications Integrated Systems L.P.				Delaware
Global Military Aircraft Solutions, LLC*				Delaware
L-3 Communications Vertex Aerospace LLC				Delaware
Army Fleet Support, LLC*				Delaware
J-R Technical Management, L.L.C.*				Texas
J-R Technical Services Limited Partnership, L.L.P.*				Texas
L-3 Communications Flight Capital LLC				Delaware
L-3 Communications Flight International Aviation LLC				Delaware
L-3 Communications Vector International Aviation LLC				Delaware
L-3 Communications Applied Signal and Image Technology, Inc.				Maryland
L3 Communications Australia Proprietary Limited				Australia
L-3 Communications Australia Pty Ltd				Australia
L-3 Communications Avionics Systems, Inc.				Delaware
L-3 Communications AVISYS Corporation				Texas
L-3 Communications Aydin Corporation				Delaware
Aydin Foreign Sales Limited				Guam
Aydin S.A.*				Argentina
L-3 Communications Global Network Solutions U.K. Ltd.				United Kingdom
L-3 Communications Investments Inc.				Delaware
Aydin Yazilim ve Elektronik Sanayi A.S.*				Turkey
L-3 Communications Canada Inc.				Canada

L-3 Communications Holdings, Inc. And Subsidiaries (Continued)
As of December 31, 2005


Name				Jurisdiction
L-3 Communications MAS (Canada) Inc.				Canada
Spar Aerospace Limited				Canada
International Aerospace Management Company Scrl*				Republic of Italy
Sovcan Star Satellite Communications Inc. *				Canada
L-3 Communications CE Holdings, Inc.				Delaware
L-3 Communications Cincinnati Electronics Corporation				Ohio
L-3 Communications Electron Technologies, Inc.				Delaware
L-3 Communications EOTech, Inc.				Delaware
L-3 Communications ESSCO, Inc.				Delaware
Electronic Space Systems International Corp.				U.S. Virgin Islands
ESSCO Collins Limited*				Republic of Ireland
L-3 Communications Government Services, Inc.				Virginia
D.P. Associates Inc.				Virginia
L-3 Communications Holding GmbH				Germany
L-3 Communications ELAC Nautik GmbH				Germany
ELAC Nautik Unterstützungskaße GmbH				Germany
Power Paragon (Deutschland) Holding GmbH				Germany
EuroAtlas Gesellschaft für Leistungselektronik mbH				Germany
JovyAtlas Elektrische Umformtechnik GmbH				Germany
Astrid Energy Enterprises S.r.l.*				Republic of Italy
Narda Safety Test Solutions GmbH				Germany
PMM Costruzioni Electtroniche Centro Misure Radioelettriche S.r.l.				Republic of Italy
EMC S.r.l.*				Republic of Italy
L-3 Communications Hong Kong Limited				Hong Kong
L-3 Communications ILEX Systems, Inc.				Delaware
L-3 Communications InfraredVision Technology Corporation				California
L-3 Communications India Private Limited				India
L-3 Communications Italy S.r.l.				Republic of Italy
L-3 Communications Klein Associates, Inc.				Delaware
L-3 Communications Korea Corporation				South Korea
L-3 Communications Malaysia Sdn Bhd.				Malaysia
L-3 Communications MAPPS Malaysia Sdn. Bhd.				Malaysia
L-3 Communications MAPPS Inc.				Canada
L-3 Communications MAPPS Investments, LLC				Delaware
L-3 Communications Marine Holdings AS				Norway
L-3 Communications Valmarine AS				Norway
L-3 Communications Navigation AS				Norway
L-3 Communications Marine Systems UK Ltd.				United Kingdom
FAST Holdings Limited*				United Kingdom
L-3 Communications MAS (US) Corporation				Delaware
L-3 Communications Mobile-Vision, Inc.				New Jersey
L-3 Communications Security and Detection Systems, Inc.				Delaware
L-3 Communications Singapore Pte Ltd				Singapore
L-3 Communications Sonoma EO, Inc.				California
L-3 Communications Titan Corporation				Delaware

L-3 Communications Holdings, Inc. And Subsidiaries (Continued)
As of December 31, 2005


Name				Jurisdiction
Cayenta, Inc.*				Delaware
Datron / Trans World Communications Int’l. Ltd.				U.S. Virgin Islands
Horizons Technology International, Ltd.				Barbados
Intelligence Data Systems, Inc.				Virginia
LinCom Wireless, Inc.*				Delaware
ProCom Services, Inc.				California
Pulse Engineering Services Inc.				Delaware
Sakon, LLC*				Delaware
Sakon Calling Cards, LLC*				New Jersey
Titan Deutschland GmbH				Germany
Titan Facilities, Inc.				Virginia
Delta Lord Joint Venture*				Florida
Titan Italia S.r.l.				Republic of Italy
Titan Systems Solutions UK Ltd.				United Kingdom
Titan Wireless, Inc.*				Delaware
Titan Wireless Afripa Holding, Inc.*				Delaware
L-3 Communications U.K. Ltd.				United Kingdom
Storm Control Systems Limited				United Kingdom
L-3 Communications Westwood Corporation				Nevada
L-Tres Comunicaciones Cost Rica, S.A.				Costa Rica
Medical Education Technologies, Inc.*				Delaware
Microdyne Corporation				Maryland
Microdyne Communications Technologies Incorporated				Maryland
MCTI Acquisition Corporation				Maryland
Apcom, Inc.				Maryland
L-3 Communications CSI, Inc.				California
Microdyne Ltd.				U.S Virgin Islands
Microdyne Outsourcing Incorporated				Maryland
MPRI, Inc.				Delaware
Civilian Police International, LLC*				Delaware
CPI Police Services, Ltd.*				Cayman Islands
Forfeiture Support Associates, L.L.C.*				Delaware
MPRI International Services, Ltd.				Bermuda
MVT Equity LLC*				Delaware
New SI, LLC				Delaware
Pac Ord Inc.				Delaware
Power Paragon, Inc.				Delaware
SPD Electrical Systems, Inc.				Delaware
SPD Switchgear Inc.				Delaware
SYColeman Corporation				Florida
URS Coleman*				Maryland
Wescam Holdings (US) Inc.				Delaware
Broadcast Sports Inc.				Delaware
L-3 Communications EO/IR, Inc.				Florida
Troll Technology Corporation				California
Wescam Air Ops Inc.				Delaware

L-3 Communications Holdings, Inc. And Subsidiaries (Continued)
As of December 31, 2005


*	Represents non-wholly owned subsidiaries.

Jurisdiction

Wescam Air Ops LLC

Wescam LLC

Wolf Coach, Inc.

Massachusetts