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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.
## CONFIDENTIAL control mode wherein you fly to in pitch and fly from in yaw. While flying AOT, you depend on the other crewmember to assure you that the roll gimbal angle is staying at a reasonable value. The simulator was never able to simulate accurately what you would see through the Sun. We especially set up the AOT on the G&C roof (MSC) to look at the actual view. In addition, on the way to the Moon, we looked at the Sun with the telescope; looked through the CSM telescope with the Sun filter on to get used to what the filtered view of the Sun would look like in the optics. It's somewhat different in the telescope than in the AOT in color and general appearance. I can't account for that, but it is different. I thought the numbers ought to be both closer to zero if we didn't have any platform drift, or closer together in either case. But we had quite a spread, so I'm not sure that the check in general is really as good yet as it should be. In other words, our variation was 0.08 degree between our various measurements. The limit on the GO/NO-GO is 0.25. So, we were essentially using up a third of our margin just in variation between our marks. That's not really a good enough procedure for this important check of the platform. This procedure, being a GO/NO-GO ## CONFIDENTIAL
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