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Human Factors: The Journal of the Human Factors and Ergonomics Society
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Pilot Maneuver Choice and Workload in Free Flight

Christopher D. Wickens

University of illinois, Savoy

John Hellenberg

University of illinois, Savoy

Xidong Xu

University of illinois, Savoy

Two experiments examined pilots' maneuver choice and visual workload in a free-flight simulation. In Experiment 1, 12 pilots flew a high-fidelity flight simulator with a cockpit display of traffic information and maneuvered to avoid traffic in a simulated free-flight environment. Pilots' choices reflected a preference to make vertical rather than lateral avoidance maneuvers and to climb rather than descend. Pilots avoided both complex maneuvers and airspeed maneuvers. The data were modeled in terms of how pilots traded off factors related to safety, efficiency, mental effort, and prior habits. In Experiment 2, 10 pilots flew the same maneuvers as the pilots in Experiment 1 but followed ATC instructions rather than using the CDTI. The CDTI in Experiment 1 occupied 25% of the pilots' visual attention. A comparison of scanning with Experiment 2 suggested that the CDTI pulled visual attention away from the outside world, but this attention diversion did not leave pilots vulnerable to missing traffic not annunciated on the CDTI. Actual or potential applications of the results include understanding the safety implications of presenting traffic displays in the cockpit, and the impact of pilot maneuver preferences on airspace procedures.

Human Factors: The Journal of the Human Factors and Ergonomics Society, Vol. 44, No. 2, 171-188 (2002)
DOI: 10.1518/0018720024497943
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 Human Factors: The Journal of the Human Factors and Ergonomics SocietyHome page
C. D. Wickens, J. Goh, J. Helleberg, W. J. Horrey, and D. A. Talleur
Attentional Models of Multitask Pilot Performance Using Advanced Display Technology
Human Factors: The Journal of the Human Factors and Ergonomics Society, January 1, 2003; 45(3): 360 - 380.
[Abstract] [PDF]