A COMPARISON OF FOUR TYPES OF ALTIMETERS: PHASE I. TRACKING A COMMAND PROFILE. PHASE II. READING PRESET ALTITUDES.
NAVAL RESEARCH LAB WASHINGTON D C
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A two phase experiment was carried out comparing four altimeters counter-pointer CP, counter-drum-pointer CDP, drum-pointer DP, and three-pointer 3P. One phase measured accuracy of altitude control. During this phase, the operator simultaneously performed a secondary twodimensional tracking task. The second phase measured speed and accuracy of reading random altitude presentations. Using five naval enlisted men as subjects, tracking performance was found to be best for CP and CDP, followed by DP, with 3P the poorest of the four altimeters. The results for reading accuracy in both phases showed CP to be best followed by CDP, DP and 3P in that order. Author