Press Release

L-3 Telemetry-West’s Satellite Control Center Software Manages Launch and Early Orbit Phase of Inmarsat’s Newest Satellite

SAN DIEGO, CA, August 2, 2006 — L-3 Telemetry-West, a division of L-3 Communications, announced today that its I4S Satellite Control Center software was successfully used throughout the launch and early orbit phase for Inmarsat’s latest satellite, Inmarsat-4 Flight 2 (I-4 F2). The I4S system is based on L-3 Storm’s InControl-NextGeneration™ (InControl-NG) software suite integrated with Inmarsat’s in-house-developed software.

The I-4 F2 satellite, built by EADS Astrium, will deliver unprecedented 3G-compatible voice and broadband data service to mobile users and is one of the largest and most sophisticated commercial communications satellites ever orbited, with a launch mass of approximately 5,950 kilograms — roughly the size of a London double-decker bus.

“The launch and early orbit phase is a crucial part of the mission,” said Ruy Pinto, director of satellite control and navigation for Inmarsat. “It is vital we have software systems that are completely reliable and in which we can have absolute faith. The L-3 InControl-NG software suite, integrated with the Inmarsat real-time kernel, gives us a system that manages the LEOP phase very effectively and then transitions smoothly to routine operations with the same system.”

After performing flawlessly during early orbit, L-3’s software was used for the final mission-critical maneuver — the unfurling of the spacecraft's giant nine-meter circular reflector. This task was completed without a hitch under the command of Inmarsat's Satellite Control Center in London using L-3’s InControl-NG. Three different electrical motors were used in an elaborate sequence of stepped movements involving 54,000 separate command signals over 10 hours to bring the boom into its final position.
The InControl-NG software system is already demonstrating its inherent fleet capabilities through automated control of both Inmarsat’s existing diverse fleet of satellites as well as its global network of ground stations. The I-4 F2 satellite is the second of three new Astrium Eurostar 3000 satellites procured by Inmarsat, all of which will leverage L-3’s software.

Key features of the InControl-NG software include the use of flexible open industry standards, such as CORBA, Java and XML, in addition to single or multiple operator control of several heterogeneous entities. Archiving, archive retrieval and data analysis are also integrated within the functionality of the I4S software suite. The new system replaces the currently operational system, which was also supplied by L-3 Telemetry-West. In addition to providing improved functionality, the new software delivers increased efficiency based on new tools, a unified human-machine interface and advanced operations automation.

Inmarsat plc is the leading provider of global mobile satellite communications. Since 1979, Inmarsat has been providing reliable voice and high-speed data communications to governments, enterprises and other organizations with a range of services that can be used on land, at sea or in the air. The company's services are delivered through a world-class network of leading telecom groups. The company is quoted on the London Stock Exchange with the ticker symbol “ISAT.” For the year ended 31 December 2004, group revenue was $480.7 million, with operating profit of $159.1 million. More information can be found at www.inmarsat.com/.

L-3 Telemetry-West is the world’s premier provider of custom flight hardware and systems solutions for missile telemetry/flight termination and spacecraft TT&C, as well as tactical intelligence receivers and terrestrial HF and microwave radios. Additionally, L-3 Telemetry-West leads the telemetry and test industry in the design and manufacture of advanced real-time commercial-off-the-shelf ground hardware and software solutions for spacecraft command and control, satellite manufacturing and on-orbit operations, launch testing and monitoring, flight test, weapons test and development, surveillance and detection and general-purpose data acquisition. All solutions are offered with complete systems engineering and integration services and are backed by a global customer support organization. The company has more than 50 years of experience in telemetry and data acquisition technology and serves virtually every major aerospace organization in the world.

To learn more about L-3 Telemetry-West, please visit the company’s web site at www.L-3Com.com/tw.

Headquartered in New York City, L-3 Communications is a leading provider of Intelligence, Surveillance and Reconnaissance (ISR) systems, secure communications systems, aircraft modernization, training and government services. The company is a leading merchant supplier of a broad array of high technology products, including guidance and navigation, sensors, scanners, fuzes, data links, propulsion systems, simulators, avionics, electro optics, satellite communications, electrical power equipment, encryption, signal intelligence, antennas and microwave components. L-3 also supports a variety of Homeland Security initiatives with products and services. Its customers include the Department of Defense, Department of Homeland Security, selected U.S. Government intelligence agencies and aerospace prime contractors.

To learn more about L-3 Communications, please visit the company’s web site at www.L-3Com.com.

SAFE HARBOR STATEMENT UNDER THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995

Except for historical information contained herein, the matters set forth in this news release are forward-looking statements. Statements that are predictive in nature, that depend upon or refer to events or conditions or that include words such as “expects,” “anticipates,” “intends,” “plans,” “believes,” “estimates” and similar expressions are forward-looking statements. The forward-looking statements set forth above involve a number of risks and uncertainties that could cause actual results to differ materially from any such statement, including the risks and uncertainties discussed in the company’s Safe Harbor Compliance Statement for Forward-looking Statements included in the company’s recent filings, including Forms 10-K and 10-Q, with the Securities and Exchange Commission. The forward-looking statements speak only as of the date made, and the company undertakes no obligation to update these forward-looking statements.

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