FLIGHT NOTES BY BUZZ ALDRIN WHILE ON THE MOON FLOWN Apollo 1

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FLIGHT NOTES BY BUZZ ALDRIN WHILE ON THE MOON FLOWN Apollo 11 LM Lunar Surface Checklist. A single sheet approximately 5.5x8 inches, being SUR-50 and SUR-51 of the checklist. It was part of the Post EVA section of the checklist. NASA/MSC, 30 June 1969

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After Armstrong and Aldrin completed the first lunar surface excursion, they climbed back into and configured the LM for the Post EVA operations. This included a short rest period. Upon sending the LM crew a wake up call at about 120 hours and 40 minutes into the flight, Mission Control read up the first of several updates for this checklist. Aldrin recorded that update of: "122:15 Do P-22 PGNS 20 @ G N Dict," meaning at 122 hours, 15 minutes into the flight, do a Program 22 as per the PGNS (Primary Guidance and Navigation Section) page 20 in the Guidance and Navigation Dictionary. This was in conjunction with the steps listed on SUR-50 which included steps to obtain star sightings for the proper alignment of the navigation platform. Steps on SUR-51 included Rendezvous Radar (RR) checks which Aldrin recorded as being done with the LM computer at "119:59:5992." These steps included RR MODE -- SLEW, AUTO TRACK, and TEST/MONITOR.