The International Maritime Satellite Organization ( International Maritime Satellite Organization (Inmarsat plc) is a British satellite communications company founded in 1979, headquartered in London, with 11 geostationary orbital communications satellites, providing communications services to governments, aid agencies, businesses and other organizations in remote areas or areas without reliable terrestrial The company's 11 geostationary satellites provide communications services to governments, aid agencies, businesses and other organizations in remote areas or areas without reliable terrestrial communications.