Tags: Artificialsatellite, Satellite.
Soyuz 7K-T No.39 anachronistically named Soyuz 18a or Soyuz 18-1 by some sources and also known as the April 5 Anomaly[citation needed]) was an unsuccessful launch of a manned Soyuz spacecraft by the Soviet Union in 1975. The mission was expected to dock with the orbiting Salyut 4 space station but due to a failure of the Soyuz launch vehicle the crew failed to achieve orbit. The crew consisted of commander Vasili Lazarev an Air Force major and flight engineer Oleg Makarov a civilian.