Igla (spacecraft docking system)
The IGLA docking system was a Russian radio telemetry system for automated docking of Soyuz (spacecraft). The first prototypes were made in late 1965. On 30 October 1967, the first automated docking of Soyuz unmanned spacecraft took place.


  • The Soyuz 15
    Soyuz 15
    Soyuz 15 was a 1974 manned space flight which was to have been the second mission to the Soviet Union's Salyut 3 space station with presumably military objectives....

     mission was aborted when the system failed to dock to the Salyut 3, on 26 August 1974. There was no manual backup system.
  • Salyut 5, launched on June 22, 1976, was equipped with an improved radio system. On July 6, 1976, the Soyuz 21
    Soyuz 21
    Soyuz 21 was a 1976 Soviet manned mission to the Salyut 5 space station, the first of three flights to the station. The mission's objectives were mainly military in scope, but included other scientific work. The mission ended abruptly with cosmonauts Boris Volynov and Vitaly Zholobov returning to...

     had problems docking automatically, but was able to manually dock. Soyuz 23
    Soyuz 23
    Soyuz 23 was a 1976 Soviet manned space flight, the second to the Salyut 5 space station. Cosmonauts Vyacheslav Zudov and Valery Rozhdestvensky arrived at the station, but an equipment malfunction did not allow docking and the mission had to be aborted....

    failed to dock, ran out of fuel to manual dock, and returned to earth.

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