Information Requirements for Pilot Supervision of Automatic Landing in Low Visibility Conditions,
NAVAL AIR TEST CENTER PATUXENT RIVER MD
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The pilot-in-command is fully and solely responsible for supervising the approach and ensuring that the airplane will land safely in the touchdown zone, no matter what the visibility, and no matter whether control is manual or through an autopilot. Absence of an alarm is not sufficient information upon which to base any essential part of this assessment or decision. Situation information, not a flight director, should be the primary content of the display, and it must be delivered in a fully integrated format, head-up. Even if in theory nonvisual landings are permitted, considerations of pilot psychology, practical experience, and training require the display to be available head-up.