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Historic flown double-sided cue card carried on Apollo 9, 10.5 x 8, signed and flight-certified in green felt tip, "Flown on Apollo 9, Checklist for 1st LM EVA by LMP. Jim McDivitt, CDR." The card walks through various steps for a "CDR Pressure Integrity Check" and "LMP Pressure Integrity Check"; photography procedures for "First Sunrise," "First Sunset," "Second Sunrise," and "Second Sunset"; "Post EVA Systems Configuration"; "Backup Comm Configuration"; and "Emergency Cabin Repress." Both sides bear affixed Velcro swatches and various notations and modifications made in black ink (e.g. "PLSS Fan - On (Warble Warning Tone - Off)," "Suit Circuit Relief - Auto (4.3 psi in CDR Suit)," and "EVA Backup"). In fine condition.
On March 6, 1969, Apollo 9 astronaut Rusty Schweickart conducted a 37-minute EVA to test the new Apollo spacesuit and Portable Life Support System (PLSS), marking the first U.S. spacewalk where an astronaut was fully independent of the spacecraft’s life-support. During the EVA, he moved along the Lunar Module’s exterior handrails and demonstrated that astronauts could safely transfer between the Command Module and Lunar Module in case of emergency. Schweickart’s spacewalk was a critical step in proving the equipment and procedures that would later be essential for Apollo lunar landings.
