West crater is a small crater in Mare Tranquillitatis on the Moon, east of the Apollo 11 landing site, which is known as Tranquility Base.

[1] The Apollo 11 astronauts Neil Armstrong and Buzz Aldrin landed the Lunar Module (LM) Eagle approximately 550 meters west of West crater on July 20, 1969.

The lunar lander flew over the crater at an altitude of about 100 meters.

[2] The boulder field that Armstrong saw a need to avoid during the descent was the ejecta of West crater.

[2] At the time of Apollo 11, the words “east” and “west” were used to describe directions on the Moon from the perspective of an observer on Earth.