Vertical navigation displays : pilot performance and workload during simulated constant-angle-of-descent GPS approaches
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2000-03-26
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Abstract:This study compared the effect of alternative graphic or
numeric cockpit display formats on the tactical aspects of
vertical navigation (VNAV). Display formats included:
a) a moving map with altitude range arc, b) the same
format, supplemented with a push-to-see profile view,
including a vector flight path predictor, c) an equivalent
numeric format, d) a numeric non-VNAV format. Sixteen
pilots each flew four different approaches with each
format in a Frasca 242 simulator. Vertical and horizontal
flight technical errors (FTE), workload, and subjective
display preferences were measured. VNAV displays
improved vertical FTE by as much as a factor of two
without increasing workload. Relative advantages of the
graphics formats are discussed.
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