By Robert Godwin
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Additional info for Apollo 11 : the NASA mission reports
5. Although the alarms did not degrade the performance of any primary guidance or control function, they did interfere with an early assessment by the crew of the landing approach. Arrival at high gate (end of braking phase) to final approach phase program P64 occurred at of 125 ft/sec. These values are slightly lower acceptable boundaries. At about 5000 feet, the control mode from automatic to attitude-hold to anticipation and the automatic switch 7129 feet at a descent rate than predicted but within Commander switched his check manual control in of the final descent.
1 PREPARATION Lunar Module The crew was awakened according to the flight plan schedule. The liquid cooling garment and biomedical harnesses were donned. In anticipation, these items had been unstowed and prepositioned the evening before. Following a hearty breakfast, the Lunar Module Pilot transferred into the lunar module to accomplish initial activation before returning to the command module for suiting. This staggered suiting sequence served to expedite the final checkout and resulted in only two crewmembers in the command module during each suiting operation.
The configuration of the environmental control system included operation of the secondary glycol loop and provided comfortable cockpit temperature conditions. 2 LAUNCH Lift-off occurred precisely on time with ignition accompanied by a low rumbling noise and moderate vibration that increased significantly at the moment of hold-down release. The vibration magnitudes decreased appreciably at the time tower clearance was verified. The yaw, pitch, and roll guidance-program sequences occurred as expected.
Apollo 11 : the NASA mission reports by Robert Godwin