Caption: "Go/No Go Cue Card December 7-19, 1972
Apollo 17
"Titled Mission Rules No-Go's on the front and Alarm Codes (PDI) on the back, this printed cardstock page, covered with lunar dust, was flown to the moon on Apollo 17's lunar module Challenger. The information on this card could literally make the difference between a successful or failed mission.
"The astronauts received intense and thorough training, but still relied on these cue cards when events were happening quickly during mission-critical periods."