FLTSATCOM (Fleet Satellite Communications)
FLTSATCOM (Fleet Satellite Communications) is a constellation of American military satellites in geostationary orbit which, together with Leasats, supported worldwide, ultra-high-frequency (UHF) communications between naval aircraft, ships, submarines, and ground stations, and between the Strategic Air Command and the national command authority network. It became fully operational in January 1981 and was gradually replaced during the 1990s by satellites in the UFO (UHF Follow-On) series. An outgrowth of the LES (Lincoln Experimental Satellite) series and Tacsat 1, FLTSATCOM was developed by the Navy to be the first complete operational system in space to serve the tactical user. However, through special transponders carried aboard the satellites it also supported AFSATCOM (Air Force Satellite Communications System), which is a vital component of the American strategic nuclear capability.