Soyuz 7K-OKS (also known as Soyuz 7KT-OK) is a version of the Soyuz spacecraft and was the first spacecraft designed for space station flights. Its only crewed flights were conducted in 1971, with Soyuz 10 and Soyuz 11.

Design

The two craft of the Soyuz 7K-OKS generation were modified from the original Soyuz 7K-OK. The new "probe and drogue" docking mechanism,

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