Lockheed Martin's "Silent Sentry(TM)" Surveillance System Receives

            Aviation Week Magazine's Technology Innovation Award

   GAITHERSBURG, MD., (May 10, 1999) ... Lockheed Martin's Silent
   Sentry(TM) passive surveillance system, which uses television and
   radio broadcast signals to detect aircraft and other airborne objects,
   has received Aviation Week & Space Technology magazine's Technology
   Innovation Award.

   In its May 10 issue, the magazine named the Silent Sentry system,
   along with nine other products and technologies, recipients of its
   Technology Innovation award, which recognizes innovative product and
   service technologies in the global aerospace business. This is the
   third year the magazine has presented the awards.

   Last year, Lockheed Martin Mission Systems publicly announced the
   Silent Sentry system, which is capable of detecting airborne objects
   such as airplanes, helicopters and rockets in real-time and with high
   accuracy. Now, the company has migrated the technology to a prototype
   mobile platform and validated the system's surveillance accuracy
   during a recent military exercise held to evaluate current and
   emerging technologies.

   The All Services Combat Identification and Evaluation Team joint
   services exercise at Ft. Stewart, Ga., in March gave Mission Systems
   an opportunity for real-time testing of its Silent Sentry system
   against a variety of aircraft, including fighter, bomber and radar
   surveillance aircraft and helicopters.

   "We're extremely pleased with the results. The surveillance accuracies
   we measured rival those you would get with traditional surveillance
   systems," said Terry Drabant, president, Lockheed Martin Mission
   Systems. "There are a lot of air surveillance missions the Silent
   Sentry system could be used for. Our unique features enable our system
   to be used for a wide range of applications."

   "Having devoted considerable energy in developing this novel
   technology for more than a decade, we are understandably delighted in
   the prestigious public recognition of our efforts by Aviation Week."

   Mission Systems' engineers have developed and successfully tested
   Silent Sentry's innovative Passive Coherent Location (PCL) technology
   and its precise algorithms over the past 15 years. Commercial
   technology, such as powerful Silicon Graphics, Inc.® processors, high
   dynamic range receivers and three-dimension visualization from the
   Autometric Edge Product Family(TM) comprise the system's other major
   components.

   The system uses everyday television and radio broadcast signals to
   illuminate, detect and track precise target trajectories. The system
   does not transmit radio frequency (RF) energy as conventional radars
   do and has no RF "signature" to alert enemy threats. Instead, it uses
   the energy that already exists in airspace for detection purposes, and
   does not adversely impact or harm the environment.

   "With no radar-like RF signature, the Silent Sentry system cannot be
   detected," said Drabant. The system has unlimited access to widely
   available broadcast signals worldwide for accurate, precise detection
   and tracking of targets in real-time, he said.

   The system is intended as a passive detection system for U.S.
   government civil agency and military purposes; it can be deployed to
   plug gaps in radar coverage to provide "early warning" detection, and
   enhance command and control decision-making.

   The Silent Sentry product family includes versions which can be
   mounted in buildings and fixed structures, or in deployed
   configurations, such as trucks, or shelters, for rapid relocation.
   Systems range in cost from $3 million to $5 million.

   Lockheed Martin Mission Systems is a business unit of the
   Corporation's Information & Services Sector. In addition to systems
   integration, Mission Systems provides command, control, communications
   and computers for DoD systems, software development for intelligence
   systems, technologies and systems for satellite navigation and
   surveillance, and the command and control of satellites.

   Headquartered in Bethesda, Md., Lockheed Martin is a highly
   diversified global enterprise principally engaged in the research,
   design, development, manufacture and integration of
   advanced-technology products and services. The Corporation's
   businesses span space and telecommunications, electronics, information
   and services, aeronautics, energy and systems integration. Employing
   more than 165,000 people worldwide, Lockheed Martin had 1998 sales
   surpassing $26 billion.

   Silent Sentry is a trademark of the Lockheed Martin Corporation.

   Silicon Graphics is a registered trademark of Silicon Graphics,
   Inc.

   Edge Product Family is a trademark of Autometric, Inc.