DOI 1 Limits cue card used during training for the Apollo 16 mission. Single-sided card measures 5.75 x 4.75, is headed at the top, “DOI 1 Limits,” and lists three columns of “no go’s,” which would prevent the astronauts from beginning their Descent Orbit Initiation to the lunar surface. Among the potential problems are fire or smoke in the cabin, issues with the oxygen and hydrogen cryo tanks, and guidance and navigation problems. One line of the card has been crossed out in red ink. Reverse bears three small swatches of Velcro and is dated in type “94/72.” In fine condition, with a couple spots of mild toning. RR Auction COA.
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