LOCKHEED MARTIN ANNOUNCES "SILENT SENTRY(TM) " SURVEILLANCE SYSTEM;

   PASSIVE SYSTEM USES TV-RADIO SIGNALS TO DETECT, TRACK AIRBORNE OBJECTS

   GAITHERSBURG, MD., (October 12, 1998) ... Lockheed Martin announced
   today a new technology for surveillance, the Silent Sentry(TM) system,
   capable of detecting a wide range of airborne objects such as
   airplanes, helicopters and rockets in real-time, and with high
   accuracy.

   The heart of Silent Sentry is its innovative Passive Coherent Location
   (PCL) technology developed by Lockheed Martin Mission Systems, which
   uses everyday broadcast signals, such as those for television and
   radio, to illuminate, detect and track objects. A passive detection
   system for U.S. government civil agency and military purposes, Silent
   Sentry transmits no 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.

   "Television and radio transmissions blanket the Earth and extend into
   the far edges of space, can give Silent Sentry broad application for a
   wide range of surveillance tasks, and unlimited access to broadcast
   signals for accurate, precise detection and tracking of targets in
   real-time," said Terry Drabant, president, Lockheed Martin Mission
   Systems.

   By using broadcast transmitters and signals available throughout the
   world, Silent Sentry casts a "wider net" than current radar systems
   and provides new levels of early detection, to reveal tangible proof
   of intruders and can enable rapid, defensive reaction to threats. The
   system can be deployed to plug gaps in radar coverage and enhance
   global awareness and command-control decision-making.

   "Silent Sentry is a passive system which doesn't transmit a radar-like
   RF signature and cannot be detected. This quality gives it a superior
   level of security for surveillance operations, and is also an
   environmentally friendly solution," said Drabant, whose company has
   spent 15 years developing and successfully testing the innovative PCL
   technology.

   Silent Sentry is a multi-static illuminator surveillance system which
   uses three or more broadcast signals to determine precise
   three-dimensional target trajectories, and unlike "scanning" radars,
   Silent Sentry provides continuous coverage of the airspace. 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.

   Commercial technology such as powerful processors and high dynamic
   range receivers help make Silent Sentry a low-cost approach to
   effective and reliable surveillance system coverage against a wide
   range of potential threats. A typically configured system includes
   Silicon Graphics, Inc.® processors, the Autometric Edge Product
   Family(TM) visualization and analysis software, and receivers built by
   Lockheed Martin from commercial products, and range in cost from $3
   million to $5 million.

   "As the cost of commercial technology falls, and performance climbs in
   proportion, the Silent Sentry system will become an even more
   affordable and increasingly attractive complement to existing
   surveillance systems," said Drabant.

   Over the past 10 years, Missions Systems has successfully tested its
   enabling PCL technology in a variety of environments to prove its
   applicability in U.S. government military and civil agency
   applications.

   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.

   Mission Systems is prime contractor for numerous command, control,
   communications, computers, intelligence, surveillance and
   reconnaissance (C^4ISR )programs. Among the C^4ISR programs are the
   Theater Battle Management Core Systems, Global Command and Control
   Systems - Army, the All Source Analysis System, the Maneuver Control
   System, Global Transportation Network and the Computing Environment
   STRATCOM Architecture program.

   Lockheed Martin is also pioneering efforts to achieve interoperability
   among C^4ISR systems through its privately-funded research and
   development initiative, called Project Rainbow.

   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 core
   businesses span space and telecommunications, electronics, information
   and services, aeronautics, energy and systems integration. Employing
   approximately 170,000 people worldwide, Lockheed Martin had 1997 sales
   surpassing $28 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.