A Good Pilot is Always Learning

Human Performance Visual Illusions Awareness

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Human Performance Visual Illusions Awareness Flight Operations Briefing Notes Flight Operations Briefing Notes Human Performance Visual Illusions Awareness I • • • II Introduction Visual illusions take place when conditions modify the pilot's perception of the environment relative to his / her expectations. Visual illusions may result in landing short of the runway, hard landing or runway overrun, but may also cause spatial disorientation and loss of control. This Flight Operations Briefing Note provides an overview of: Factors and conditions that may cause visual illusions; How visual illusions affect the pilot's perception of the airport / runway environment and runway; and, How to reduce the effects of visual illusions by implementing related prevention strategies and lines-of-defense in training and line operation. Statistical Data 30 % of approach-and-landing accidents occur during the conduct of visual approaches or during the visual segment of an instrument approach. Visual approaches at night present a greater exposure because of reduced visual cues, increased likelihood of visual illusions and risk of spatial disorientation. Low visibility and/or precipitations are a circumstantial factor in more than 70 % of approach-and-landing accidents, including those involving CFIT. Page 1 of 15

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