Maritime communications.

Typical orbit: 35777 km x 35796 km at 11 degrees inclination. Mass: 655 kg (1,444 lb).

• 1976 February 19 - Marisat 1 - Launch Site: Cape Canaveral. Launch Complex: LC17B. Launch Vehicle: Delta. Mass: 655 kg (1,444 lb). Perigee: 36,033 km (22,389 mi). Apogee: 36,143 km (22,458 mi). Inclination: 13.90 deg. Period: 1,451.50 min.
  Maritime communications. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). Positioned in geosynchronous orbit over the Atlantic Ocean at 15 deg W in 1976-1990; over the Americas at 106 deg W in 1990-1997 As of 2 September 2001 located at 168.03 deg W drifting at 3.834 deg W per day. As of 2007 Mar 10 located at 20.39E drifting at 3.837W degrees per day.

• 1976 June 10 - Marisat 2 - Launch Site: Cape Canaveral. Launch Complex: LC17A. Launch Vehicle: Delta. Mass: 362 kg (798 lb). Perigee: 36,513 km (22,688 mi). Apogee: 37,604 km (23,365 mi). Inclination: 14.90 deg. Period: 1,501.60 min.
  Maritime communications. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). Positioned in geosynchronous orbit over the Pacific Ocean at 176 deg E in 1976-1991 over the Pacific Ocean 178 deg W in 1991-1996 As of 5 September 2001 located at 158.48 deg W drifting at 15.761 deg W per day. As of 2007 Mar 10 located at 162.62W drifting at 15.745W degrees per day.

• 1976 October 14 - Marisat 3 - Launch Site: Cape Canaveral. Launch Complex: LC17A. Launch Vehicle: Delta. Mass: 362 kg (798 lb). Perigee: 35,782 km (22,233 mi). Apogee: 35,789 km (22,238 mi). Inclination: 11.60 deg. Period: 1,436.10 min.
  Maritime communications. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). Positioned in geosynchronous orbit over the Indian Ocean at 73 deg E in 1976-on. As of 26 August 2001 located at 33.84 deg W drifting at 0.011 deg W per day. As of 2007 Mar 10 located at 34.60W drifting at 0.007W degrees per day.