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Aeromedical factorsQuestion 886 of 934

What illusion can result from flying into fog?

  1. A feeling of pitching down, which can lead to a flatter approach
  2. A feeling of a wing low, which can lead to a turn
  3. A feeling of pitching up, which can lead to a steeper approach
  4. A feeling of a narrower runway, which can lead to a high flare
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Correct answer: A feeling of pitching up, which can lead to a steeper approach

Pilots who do not recognize this illusion often steepen the approach abruptly.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 17: Aeromedical Factors — Optical Illusions, page 432

Practice aeromedical factors

Questions last reviewed: 18 October 2026