Flown large double-sided "Mission Rules No-Go's" cue card carried to the lunar surface on Apollo 15, 8 x 10.5, signed and flight-certified in blue felt tip, "Flown to the lunar surface, during Apollo 15, July 26-Aug 7, 1971, Dave Scott, Apollo 15 CDR." The front lists a series of "Pre PDI" potential no-go situations, and the reverse lists alarm codes with definitions and actions. In fine condition. Accompanied by a signed letter of provenance from Scott, in part: "I hereby certify that the large double-sided Cue Card: 'Mission Rules No-Go's' and 'Alarm Codes (PDI)' included with this letter was used on the lunar surface aboard the Falcon Lunar Module (LM) during Apollo 15...This large double-sided Cue Card...consists of two sets of major contingency procedures the steps for which are abbreviated to facilitate ease of accessibility and rapid use...The Cue Card was prepared to summarize a written checklist the procedures for which were simulated many times prior to the mission, and the Card was essential to minimize time required and enhance safety. The activities covered by the 'Mission Rules No-Go's' side of the cue card include the action to be taken within each of the seven major spacecraft systems during the following four phases of the lunar landing: (1) 'Pre PDI' (Pre Power Descent Initiation—ignition of the descent propulsion system—the beginning of the descent from lunar orbit at 50,000 feet above the surface); (2) 'PDI to PDI+6+10' (from PDI to 6 minutes ten seconds after PDI); (3) 'PDI+6+10 to Hi Gate' (from 6+10 after PDI to the 'high gate' position in the descent trajectory, approximately 7,500 feet above the lunar surface); and (4) 'Hi Gate to TD' (Hi Gate to Touchdown on the surface). The seven major systems consist of EPS (Electrical Power System), ED (Explosive Devise, or pyro system), ECS (Environmental Control System), G&C (Guidance & Control System), DPS (Descent Propulsion System), APS (Ascent Propulsion System), and RCS (Reaction Control System). The activities covered by the 'Alarm Codes (PDI)' side of the cue card consist of actions to be taken in response to the 5-digit alarm codes displayed on the computer DSKY (Display and Keyboard). The cue card table consists of three columns: (1) the CODE number displayed (5 digits on the DSKY); (2) the DEFINITION, or meaning of the code number; and (3) the specific ACTION to be taken." A superb mission-critical, lunar-flown cue card from Apollo 15, the first extended scientific exploration of the moon.
Terms and abbreviations used in our descriptions.