press release

ERST and American Mobile Satellite Corporation to offer emergency telecommunications services

BREA, Calif., Dec. 3, 1996 -- ERST, Inc., Unocal Corporation's Emergency Response Strike Team subsidiary, and Reston, VA-based American Mobile Satellite Corporation (AMSC) are combining efforts to provide transportable satellite phones and SKYCELL® Satellite Communication Services during emergencies and disasters.

Under terms of the agreement ERST will make the 12 transportable satellite phones they have in inventory available 24 hours-a-day for short-term rental to companies, municipalities or other organizations that need advanced communications capabilities during natural disasters, industrial accidents and other emergency situations. AMSC will provide reliable satellite communications and 24-hour customer support.

When disaster strikes, our portable satellite services can deliver communications relief to any organizations said K. Tim Perkins, president of ERST.

Gary Parsons, AMSC president and chief executive officer noted that in many emergencies, one of the biggest problems is the loss of communications systems. "In metropolitan areas, telephone and cellular systems can become inoperable or overwhelmed with calls; in remote areas, there may not be any reliable communications system at all. Our satellite communications will provide reliable communications in virtually any situation."

The self-contained briefcase-sized portable satellite telephones are easy to set up and use, and can be counted on for high quality voice, data and fax communications whenever and wherever cellular or landline is unavailable. Features of the phone include digital handset with full duplex voice capability, data and fax ports, and an optional push-to-talk microphone for AMSC's SKYCELL Plus nationwide digital voice dispatch service.

AMSC's satellite system provides seamless communications coverage across virtually all of North America. The system is independent of power sources and earth stations in the impacted area making it attractive to public safety officials, disaster and relief services, news gathering organizations and others who need guaranteed communications accessibility.

ERST, Inc., provides emergency management services to oil, chemical and transportation companies, as well as other industrial firms and municipalities. Additional information can be obtained by calling ERST at 800-730-7611.

American Mobile Satellite Corporation offers a full range of mobile communications including telephone, digital broadcast dispatch, data, and position reporting services. The AMSC-1 satellite provides coverage over the continental United States, Alaska, Hawaii, Puerto Rico, the Virgin Islands, and hundreds of miles of U.S. coastal waters. Additional information can be obtained by calling AMSC at 800-755-7373,.

Updated: December 1996