A variant of the Soyuz craft, the "Lunniy Orbitalny Korabl" (LOK) command module, would carry two men, with three modules like the regular Soyuz 7K-OK, but was heavier by a few tons. The 7K-OK was half the mass of the three-crew Apollo orbital command ship. The "Lunniy Korabl" (LK) accommodated only one cosmonaut, so in the Soviet plan, only one cosmonaut would land on the Moon. The mass of the LK was 40% of the mass of the Apollo lunar lander.