Small training-used single-sided "DEDA Addresses" cue card from the Kennedy Space Center LM Simulator, 4.75 x 3, signed on the front in blue felt tip, "Fred Haise, Apollo 13 LMP," and annotated by him on the reverse, "Information & addresses for the DEDA readouts from the Abort Guidance System Computer." The reverse additionally bears a swatch of blue Velcro used to affix it to the LM Simulator, as well as some annotations. In fine condition. Accompanied by a color copy of a letter of provenance from Simulator Instructor Robert Pearson, stating that this was from a set of training cue cards used by both the Apollo 13 prime crew of Fred Haise and James Lovell, and the backup crew of John Young and Charlie Duke.
"DEDA" refers to the Data Entry and Display Assembly, which is the assembly used by the astronauts to enter data into the Abort Guidance System (AGS), or to see data displayed by the AGS. It was mounted in the lower-right portion of the LM's control panel, just in front of the Lunar Module Pilot. For the first critical transearth midcourse correction burn (MCC-5) of Apollo 13, the instructions for proper burn attitude were basically to first get Earth into the window and then roll the spacecraft so that the cusps of Earth's illuminated portion were in line with the horizontal line of the Crewman Optical Alignment Sight (the reticle sight at commander's window) and with Earth's illuminated side on top; then to pitch up so that the sun was visible at top center of the Alignment Optical Telescope. Haise was instructed to leave the DEDA in address 470 during the MCC-5 burn, an output address reflected on the front of this cue card.
Terms and abbreviations used in our descriptions.