TKS spacecraft

The TKS spacecraft was a Soviet spacecraft system developed in the late 1960s to deliver crew, cargo, and fuel to the military Almaz space stations. It consisted of two linked but independently operable parts: the VA spacecraft, a compact capsule for crew launch and re-entry, and the Functional Cargo Block (FGB), which provided cargo space, docking hardware, and the main orbital maneuvering engines. When the VA returned to earth, the FGB could be left behind at the station.