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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.
“Neil”19 pages
## CONFIDENTIAL possibility of jeopardizing the integrity of the LM. So the COMM was operated, and the connections were made, but the depressurization sequence with the PLSS's on the backs was never completed. The times when we actually operated the PLSS was done always in the chamber and never done with the LM systems operable. So two things were new to us. One was that it took a very long time to depressurize the LM through the bacteria filter with the PLSS adding gases to the cockpit environment and the water boiler operation or something adding some cabin pressure. The second was that we weren't familiar with how long it would take to start a sublimator in this condition. It seemed to take a very long time to get through this sequence of getting the cabin pressure down to the point where we could open the hatch, getting the water turned on in the PLSS, getting the ice cake to form on the sublimator, and getting the water alarm flag to clear so that we could continue. It seemed like it took us about a half hour to get through this depressurization sequence. And it was one that we had never duplicated on the ground. Well, in retrospect, it all seemed to work okay, it was just that we weren't used to spending all that time standing around waiting. ## CONFIDENTIAL
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