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This is Volume 1 of NASA's Apollo 11 Technical Crew Debriefing, dated July 31, 1969. The Mission Operations Branch of the Flight Crew Support Division at the Manned Spacecraft Center in Houston prepared it, and it was originally classified Confidential. In it Armstrong, Aldrin and Collins go phase by phase through suiting, launch, powered flight, Earth orbit and lunar surface activities. They comment on suit fit, vibration, checklists, lunar dust, footing and poor sleeping conditions in the lunar module. A section titled Visual Sightings appears in the table of contents.
“Gray”3 pages
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## CONFIDENTIAL 8. 1.22 Fuel cell puring COLLINS Fuel cell purging was nominal. 8. 1.23 Update pads COLLINS Update pads were good. 8. 1.24 COAS calibration COLLINS I did not calibrate the COAS. 8. 1.25 COAS tracking COLLINS I did not track with the COAS. After DOI, I did P20 tracking of the LM. I updated the state vector by using both VHF ranging marks and sextant marks. This is something that was not part of the original flight plan. There was no requirement initially for the command module to track the LM between DOI and PDI. It was something that I added and I'm glad I did, because it allowed me to see that the system was working. We had no scheduled checks on it to see that the mark data were incorporated and just generally to prepare for the next day's activities when I would be marking on the LM for real. ## CONFIDENTIAL
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