On May 4th, 1971 the prime crew of Soyuz 11 was confirmed to be Leonov, Commander; Kubusov, Flight Engineer; and Kolodin, Research Engineer. Their assignment was to spend between 30 and 45 days on board Salyut 1.
… There was no provision for the possibility of undocking if the entire docking cycle had not been executed …
“They can’t approach at that rate,” fretted Mishin. “Why aren’t you doing anything? Tell the crew what to do!” “We don’t need to do anything; deceleration will begin now,” Rauschenbach reassured Mishin.
The objective of the Soyuz 10 mission was to deliver and return to earth the first crew of Salyut 1. The Soyuz was to hard dock with Salyut 1 and then the crew was to transfer internally to the station.
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.