with the Command Module, but not for landing. During Apollo 13, after the most critical burn near the Moon, the AGS was used in place of PGNCS because it required less electrical power and cooling water.

Apollo 11

During the Apollo 11 mission, two PGNCS alarms (1201 "No VAC areas available" and 1202 "Executive alarm, no core sets") were relayed to mission control as the first lunar landing was being attempted on July 20, 1969. The computer system overload

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