A Good Pilot is Always Learning

Human Performance Visual Illusions Awareness

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Human Performance Visual Illusions Awareness Flight Operations Briefing Notes VI VI.1 • • VI.2 • • − − − − − − • − − Prevention Strategies to Reduce the Effects of Visual Illusions To lessen the effects of visual illusions, prevention strategies and lines-of-defense should be developed and implemented based on the following recommendations. Hazard Awareness Operators should assess their exposure to visual illusions in their operating environment (i.e., over the entire route network). Flight crews should be educated and trained on the factors and conditions creating visual illusions and their effects on the perception of the environment and aircraft position: Perception of heights / depth, distances, and angles; Assessment of aircraft lateral position and glide path. The awareness of visual illusions can be supported by an identification of all hazard- airports and/or hazard-runways (in the operator's network) as a function of the available navaids, visual aids and prevailing hazards. Hazard Assessment Approach hazards – and any combination thereof - should be assessed for each individual approach, during the approach and go-around briefing, by reviewing the following elements: Ceiling and visibility conditions; Weather: Wind, turbulence; Rain showers; Fog or smoke patches; Drifting snow or sand; Snow-covered terrain / runway (white-out phenomenon); and/or, Sun height over horizon; Crew experience with airport and airport environment: Surrounding terrain (i.e., texture); and/or, Specific airport and runway hazards (runway condition, obstructions, black-hole, off-airport light patterns, …); Page 11 of 15

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