Military nuclear powered communications satellite. Development approved by the Soviet VPK Military-Industrial Commission on 8 January 1982. The satellite would have used the 5 kW nuclear reactor originally planned for the Ekran satellite and used secure uninterceptable laser and radio inter-satellite and space-to-ground communications links. Did not reach flight status before the collapse of the Soviet Union.

Typical orbit: Geosynchronous. Electrical System: Nuclear reactor. Electric System: 5.00 average kW.

• 1982 January 8 - Estafeta development approved. -
  Development of the military nuclear powered communications satellite was approved by the Soviet VPK Military-Industrial Commission. The satellite would have used the 5 kW nuclear reactor originally planned for the Ekran satellite and used secure uninterceptable laser and radio inter-satellite and space-to-ground communications links. Did not reach flight status before the collapse of the Soviet Union.