BUZZ ALDRIN'S provenance letter reads, in part: “Accompanying this letter is a page numbered 4-12A and 4-12B from the CSM 107 (Apollo 11) Launch Operations Checklist, SKB32100080-306. The pages are part of the complete manual used in the Command Module Simulator at the Manned Spacecraft Center in Houston, Texas. This page is from Section 4 titled: Abort Procedures.
The entire checklist, including this actual page, was used by all three Apollo 11 crew members: Neil Armstrong, Michael Collins, and myself. We referred to this section almost every time we performed a launch abort because the simulator team would often put us in a situation that required us to execute an abort.
Side 4-12/A has a TransLunar Injection plus 10 minute abort chart. It is a graph showing our inertial velocity at abort (up to S-IVB cutoff) as compared to our abort delta V along the X axis of the spacecraft. The S-IVB burn time is marked along the top as well as EMS delta V. There is a sample image showing the earth’s horizon as seen through our rendezvous window. Side 4-12/B has an additional graph, with the y-axis changed to the time from SPS abort cutoff to entry attitude. Both of these graphs were designed to assist our recovery from a TLI +10 Abort.
… This training was a key step which enabled our flight to make the first lunar landing on July 20, 1969… I kept this checklist after our mission as a reminder of all the training that took place back in 1969. I have written on page 4-12A: “Used in training for Apollo XI” and signed that page. A copy of the checklist cover page is included.”
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