1983-10-03

Potential Interactions of Collision Avoidance Advisories and Cockpit Displays of Traffic Information 831544

Future aircraft cockpits may be equipped with both collision avoidance systems and cockpit traffic situation displays. This paper summarizes a series of experiments investigating a pilot's ability to make a variety of traffic related decisions with a traffic display. Some of the key findings were: Pilots were not able to accurately judge the future position of an aircraft unless the display contained predictor symbols. Pilots' subjective judgements of threat were inversely proportional to time to closest approach but generally were not sensitive to small changes of other parameters of the encounter. When pilots were asked to make avoidance maneuvers based solely on the traffic display, they began their maneuvers well before a CAS advisory would have been triggered. Provided sufficient time was available, pilots preferred horizontal avoidance maneuvers.

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