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HUD symbology for surface operations: Command-guidance vs. situation-guidance formats.  (2002)
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This study investigated pilots' taxi performance, situation awareness and workload while taxiing with three different head-up display (HUD) symbology formats: Command-guidance, Situation-guidance and Hybrid. Command-guidance symbology provided the pilot with required control inputs to maintain centerline position; Situation-guidance symbology provided conformal, scene-linked navigation information; while the Hybrid symbology combined elements of both symbologies. Taxi speed, centerline tracking accuracy, workload and situation awareness were assessed. Taxi speed, centerline accuracy, and situation awareness were highest and workload lowest with Situation-guidance and Hybrid symbologies. These results are thought to be due to cognitive tunneling induced by the Command-guidance symbology. The conformal route information of the Situation-guidance and Hybrid HUD formats provided a common reference with the environment, which may have supported better distribution of attention.
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Foyle, D.C., Hooey, B.L., Wilson, J.R. & Johnson, W.A. (2002). HUD symbology for surface operations: Command-guidance vs. situation-guidance formats. SAE Transactions: Journal of Aerospace, 111, 647-658.
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Last Updated: August 15, 2019