FLOWN Apollo 11 LM G and N Dictionary A single sheet approxi

Sale 2142 - Lot 108

Price Realized: $ 6,370

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Estimate: $ 5,000 - $ 7,000

FLOWN Apollo 11 LM G and N Dictionary. A single sheet approximately 5x8 inches being a dual sided P27 UPDATE (LM) grid page. Neil Armstrong and Buzz Aldrin could use the P27 sheet to update the LGC (LM Guidance Computer) to new flight event times such as the lunar landing or rendezvous. NASA/MSC, 16 April 1969

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PURP was short for purpose of the data to be used such as LDG or the landing time on the lunar surface. V was for the command load Verb to be used, either 70, 71, 72, or 73. The GET was the time Ground Elapsed Time for the data recorded in hours, minutes, and seconds. The 1174 01 area was for the index number of command words in octal format and the grids 2 through 24 were correction word identifiers if needed.
The HR, MIN, SEC were the actual hour, minute, and second in mission elapsed time for the confirmation of a ground track verification. The LAT, LON, and ALT were the latitude, longitude, and altitude for this ground track confirmation. N34 was the noun procedure for the time of the event and N43 was the noun procedure for the latitude, longitude, and altitude.
This sheet was an excellent quick view reference for Armstrong and Aldrin during the flight. It could have been used for flight operations if necessary. Inscribed and signed: "Carried in EAGLE to the lunar surface on Apollo XI, Buzz Aldrin." Additionally signed by Aldrin the reverse.