Getting Disoriented

You just broke out of the clag on final, late in the day, with the weather at minimums, when illusion strikes. Are you low on the approach? High? Not sure? At the last moment you realize you’re high and long; time to go missed. Maybe it worked the other way around; you’re on approach and as you get to where you expect the threshold marks to pass below you realize you’re low, short and about to touch down—short of the runway. At its worst, these vision deceptions can contribute to spatial disorientation in VMC that’s more confusing than the dizziness of becoming disoriented inside the eggshell of IMC.

Key Takeaways:

• Visual illusions and spatial disorientation, often caused by conflicting sensory inputs between our eyes and inner ear, are significant aviation hazards even in good weather, particularly during approaches at dawn, dusk, or night.
• These illusions can arise from various factors like runway slope or dimensions, surrounding terrain, and "black hole" approaches (unlit areas around the runway), leading pilots to misjudge altitude or position and make dangerous approach errors.
• To mitigate these risks, pilots should understand common illusions, familiarize themselves with airport specifics, maintain strong instrument flying skills, and always trust their aircraft instruments over their senses when an illusion occurs, opting to go around if uncertainty persists.

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