In record time, the OKB-1 rebels led by Yuri Semenov developed the space station designated DOS-7K. The station used the body of a vehicle from the Almaz project, but outfitted it with modified systems from the Soyuz spacecraft. Salyut 1Salyut 1 wit...

At this point in 1973, the Soviets were attempting to fly 2 types of space station, the long duration orbital station scientific version called DOS.  The other station was a military spy space station equipped with a machine gun, called Almaz or OPS ...