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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.
Read from the scan by GLM-OCR; expect the odd misread word.
## CONFIDENTIAL
6. 3 OPTICS CALIBRATION
COLLINS Optics calibration worked all right.
6. 4 PHOTOGRAPHY; EARTH AND MOON
COLLINS We didn't photograph the Moon at this time; the Earth we did.
ARMSTRONG At this time, I think, we were starting to home in on the $ O_{2} $ flow discrepancies.
ALDRIN Yes.
ARMSTRONG I'm not sure we understand it completely. The gage was not, apparently, indicating the correct flow level and was varying with time. That's an indication for what we think might be a particular flow varying with time. It is evidenced by the fact that the quad accumulator cycle flow rate continued to decrease until it got down to about 0.3, and then it went back up to 0.4.
ALDRIN It would register around there each time. Then it seemed to go up almost to the safe value. That led me to believe that there was nothing wrong with our gage.
COLLINS Sounds like the gage was operable but out of calibration.
# CONFIDENTIAL Document, cited by the archive. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 251 pages are in the text index: search them above, or from the library's search.