An entire family of Yantar spacecraft was proposed by Kozlov’s design bureau during the initial development; information on two film return models has been declassified. Yantar was initially derived from the Soyuz spacecraft, including systems developed for the Soyuz VI military model. During design and development this changed until it had very little in common with Soyuz.

Following numerous problems in the first flight tests of the Soyuz 7K-OK, Kozlov ordered a complete redesign of the 7K-VI manned military spacecraft. The new spacecraft, with a crew of two, would have a total mass of 6.6 tonnes and could operate for a month in orbit. The new design switched the positions of the Soyuz descent module and the orbital modules and was 300 kg too heavy for the standard 11A511 launch vehicle. Therefore Kozlov designed a new variant of the Soyuz launch vehicle, the 11A511M. The project was approved by the Central Committee of the Communist Party, with first flight to be in 1968 and operations to begin in 1969. The booster design, with unknown changes to the basic Soyuz, did not go into full production. References: 474.

Feoktistov visits the cosmonaut centre. To meet Mishin's wishes, he must complete the 30 month cosmonaut training curriculum in two months. He is told flat out he doesn't meet the physical standards required for a pilot. References: 376.

• A - Saturn V/unmanned CSM development
• B - Saturn IB/unmanned LM development
• C - Saturn IB/manned CSM evaluation
• D - Saturn V/manned CSM and LM development (A dual Saturn IB mission would be an alternative to the Saturn V for mission D)
• E - CSM/LM operations in high earth orbit
• F - Lunar orbit mission
• G - Lunar landing mission (like Apollo 11)
• H - Lunar landing mission (Apollo 12, 13, and 14)
• I - Reserved for lunar survey missions (not used)
• J - Lunar landing missions, upgraded hardware (Apollo 15, 16, and 17)