FLIGHT SIMULATOR TESTS OF ALTITUDE-CODED LIGHTS.
APPLIED PSYCHOLOGY CORP ARLINGTON VA
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A regularly flashing, fixed-frequency light and a light giving altitude information by means of dot-dash signals were compared in terms of their usefulness to pilots who were trying to judge the relative altitude and vertical flight path of a simulated intruder aircraft. Standardized problems were constructed for a modified F-100151 flight simulator, and included three rates of altitude change, approaches from left and right, and a number of collisions and misses. Accuracy in determining both relative altitude and vertical flight path of the intruder was better with the altitude-coded light than with the regularly-flashing, fixed-frequency light. With both kinds of lights, pilots became less accurate in judging relative altitude, but more accurate in judging vertical flight path, as the rate of altitude change increased. Author