Apollo 11 Launch Director's Loop. 1st sequence: Channel 111 at T-93 hours, the start of the countdown for Apollo-11, July 10, 1969. 2nd sequence: Channel 111, Test Supervisor at T-89 hours, installing the "heavy ordinance" July 10, 1969. 3rd sequence: Channel 212, Spacecraft Test Conductor, approximately T-2 hours, Neil Armstrong, Michael Collins and Buz Aldrin are in the Command Module, July 16, 1969. 4th sequence: Channel 121, (Launch Vehicle?) LV Test conductor, approximately T-34 and T-40 minutes, July 16, 1969. 5th sequence Channel 111, Test Supervisor, Go / No Go decisions, approximately T-6 minutes to launch July 16, 1969; recording ends at T+1:30 minutes.
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United States Space Program Oral History Collection [Kapp], Acc. NASM.XXXX.0138, National Air and Space Museum, Smithsonian Institution.