Exhibit 21
  L-3
    Communications Holdings, Inc. and Subsidiaries
    As of December 31, 2008
  Name

JurisdictionAdvanced Systems Architectures (Holdings) Limited

United KingdomAmplidan A/S

DenmarkAPSS S.r.l.

ItalyArmy Fleet Support, LLC*

DelawareASA Technologies Limited

United KingdomAstrid Energy Enterprises S.R.L*

ItalyAviation Communications & Surveillance Systems, LLC*

DelawareAydin Foreign Sales Limited

GuamAydin Yazilim ve Elektronik Sanayi A.S.*

TurkeyBinary lonization Inc.*

DelawareBroadcast Sports Inc.

DelawareC3-ilex, LLC*

CaliforniaCayenta, Inc.*

DelawareCivilian Police International, LLC*

DelawareCombat Advanced Propulsion, LLC*

DelawareCPI Police Services, Ltd*

Cayman IslandsD.P. Associates Inc.

VirginiaDatron / Trans World Communications Intl. Ltd.

U.S. Virgin IslandsDelta Lord Joint Venture*

FloridaEarthVTS Pty Ltd

AustraliaEDI (Europe) Limited

United KingdomELAC Nautik Unterstützungskaße GmbH

GermanyElectrodynamics, Inc.

ArizonaElectronic Space Systems International Corp.

U.S. Virgin IslandsEMC S.r.l.*

ItalyEngility Corp.

DelawareESSCO Collins Limited

IrelandEuroAtlas Gesellschaft für Leistungselektronik mbH

GermanyFAST Holdings Limited*

United KingdomFAST Training Services Limited*

United KingdomFilm Europe Limited*

BelgiumForfeiture Support Associates, LLC*

DelawareGlobal Military Aircraft Systems, LLC*

DelawareHenschel Inc.

DelawareHoneywell TCAS Inc.*

DelawareHorizons Technology International, Ltd.

BarbadosHSA Systems Ltd

New ZealandHSA Systems Pty Ltd

AustraliaInternational Aerospace Management Company Scrl*

ItalyInternational Resources Group Ltd.

DelawareInterstate Electronics Corporation

CaliforniaIRG Systems South Asia Pvt. Ltd.*

IndiaJovyAtlas Elektrische Umformtechnik GmbH

GermanyJ-R Technical Management, L.L.C.*

TexasJ-R Technical Services Limited Partnership, L.L.P.*

TexasL-3 Canada Acquisition Inc.

CanadaL-3 Communications Advanced Laser Systems Technology, Inc.

FloridaL-3 Communications AIS GP Corporation

Delaware




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Name

JurisdictionL-3 Communications Applied Signal and Image Technology,
    Inc.

MarylandL-3 Communications ASA Limited

United KingdomL-3 Communications Australia Group Pty Ltd

AustraliaL-3 Communications Australia Pty Ltd

AustraliaL-3 Communications Avionics Systems, Inc.

DelawareL-3 Communications Canada Inc.

CanadaL-3 Communications Cincinnati Electronics Corporation

OhioL-3 Communications Corporation

DelawareL-3 Communications Crestview Aerospace Corporation

DelawareL-3 Communications CyTerra Corporation

DelawareL-3 Communications Dynamic Positioning and Control Systems,
    Inc.

CaliforniaL-3 Communications ELAC Nautik GmbH

GermanyL-3 Communications Electron Technologies, Inc.

DelawareL-3 Communications Electronic Systems Inc.

CanadaL-3 Communications EO/IR, Inc.

FloridaL-3 Communications EOTech, Inc.

DelawareL-3 Communications ESSCO, Inc.

DelawareL-3 Communications Flight Capital LLC

DelawareL-3 Communications Flight International Aviation LLC

DelawareL-3 Communications Foreign Holdings, Inc.

DelawareL-3 Communications Geneva Aerospace, Inc.

TexasL-3 Communications Germany Holdings, LLC

DelawareL-3 Communications Global Network Solutions U.K. Ltd.

United KingdomL-3 Communications Group Limited

United KingdomL-3 Communications Holding GmbH

GermanyL-3 Communications Holdings, Inc.

DelawareL-3 Communications Hong Kong Limited

Hong KongL-3 Communications India Private Limited

IndiaL-3 Communications InfraredVision Technology Corporation

CaliforniaL-3 Communications Integrated Systems L.P.

DelawareL-3 Communications Investments Inc.

DelawareL-3 Communications Italy S.r.l.

ItalyL-3 Communications Klein Associates, Inc.

DelawareL-3 Communications Korea Corporation

South KoreaL-3 Communications Ltd.

United KingdomL-3 Communications Magnet-Motor GmbH

GermanyL-3 Communications Malaysia Sdn. Bhd.

MalaysiaL-3 Communications MAPPS Inc.

CanadaL-3 Communications MAPPS Investments, LLC

DelawareL-3 Communications MAPPS Malaysia Sdn. Bhd.

MalaysiaL-3 Communications Marine Holdings AS

NorwayL-3 Communications Marine Systems UK Ltd.

United KingdomL-3 Communications MariPro, Inc.

CaliforniaL-3 Communications MAS (Canada) Inc.

CanadaL-3 Communications Mobile-Vision, Inc.

New JerseyL-3 Communications Nautronix Holdings, Inc.

DelawareL-3 Communications Nautronix Limited

AustraliaL-3 Communications Navigation AS

NorwayL-3 Communications Nova Engineering, Inc.

OhioL-3 Communications SafeView, Inc.

DelawareL-3 Communications Security and Detection Systems, Inc.

DelawareL-3 Communications Shared Services, LLC

DelawareL-3 Communications Singapore Pte Ltd

Singapore




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##### 



Name

JurisdictionL-3 Communications Sonoma EO, Inc.

CaliforniaL-3 Communications TCS, Inc.

GeorgiaL-3 Communications U.K. Ltd.

United KingdomL-3 Communications Valmarine AS

NorwayL-3 Communications Vector International Aviation LLC

DelawareL-3 Communications Vermögensverwaltungs GmbH &
    Co. KG

GermanyL-3 Communications Vertex Aerospace LLC

DelawareL-3 Communications Verwaltungs GmbH

GermanyL-3 Communications Westwood Corporation

NevadaL-3 Fuzing and Ordnance Systems, Inc.

DelawareL-3 G.A. International, Inc.

FloridaL-3 Global Communications Solutions, Inc.

VirginiaL-3 Services, Inc.

DelawareL-Tres Comunicaciones Costa Rica, S.A.

Costa RicaLinCom Wireless, Inc.*

DelawareLyngsø Marine A/S

DenmarkMcCorkills Marine Pty Ltd

AustraliaMGS Montage GmbH

GermanyMicrodyne Communications Technologies Incorporated

MarylandMicrodyne Corporation

MarylandMicrodyne Ltd.

U.S. Virgin IslandsMicrodyne Outsourcing Incorporated

MarylandMosaic Mapping Inc.*

CanadaMPRI International Services, Ltd.

BermudaMVT Equity LLC*

DelawareNarda Safety Test Solutions GmbH

GermanyNarda Safety Test Solutions S.r.l.

ItalyNautronix (Singapore) Pte Ltd

SingaporeNautronix Asia Pacific Pte Limited

SingaporeNordakademie gAG*

GermanyPac Ord Inc.

DelawarePower Paragon (Deutschland) Holding GmbH

GermanyPower Paragon, Inc.

DelawareSakon Calling Cards, LLC*

New JerseySakon, LLC*

DelawareSAM East Asia Ltd.

Hong KongSAM Electronics GmbH

GermanySAM Electronics Japan Ltd.

JapanSAM Electronics Korea Co. Ltd.

South KoreaSAM Electronics Nederland B.V.

NetherlandsSAM Electronics Norge A/S

NorwaySAM Electronics United Kingdom Ltd.

United KingdomSAM Taihang Electronics Co. Ltd.

ChinaSovcan Star Satellite Communications Inc.*

CanadaSpar Aerospace Limited

CanadaSPD Electrical Systems, Inc.

DelawareSPD Switchgear Inc.

DelawareSTN Schiffselektrik GmbH & Co. KG

GermanySTN Schiffselektrik Verwaltungs GmbH

GermanyStorm Control Systems Limited

United KingdomTerra Cable Singapore Pte Ltd

SingaporeTitan Deutschland GmbH

GermanyTitan Facilities, Inc.

Virginia




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Name

JurisdictionTitan Italia Srl

ItalyTitan Systems Solutions UK Ltd.

United KingdomTitan Wireless, Inc.*

DelawareTRL Electronics Limited

United KingdomTRL Technology Limited

United KingdomTroll Technology Corporation

CaliforniaURS Coleman, LLC*

MarylandW.G. Schulz GmbH

GermanyWescam Air Ops Inc.

DelawareWescam Asia PTE Ltd.*

SingaporeWescam Financial (U.S.A.) LLC

DelawareWescam Holdings (US) Inc.

DelawareWescam Inc.

Canada    *
    
    Represents a non-wholly owned
    subsidiary.