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AhaBulb: Stuff Everyone Should Know · ahabulb.com/ifr-hypoxia-altitude

At roughly what altitude do judgment, memory and coordination begin to suffer from hypoxia?

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  1. 12,000 to 15,000 feet
  2. 5,000 to 8,000 feet
  3. Above 30,000 feet only

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References

  1. FAA Aeronautical Information Manual 8-1 Medical Facts for Pilots www.faa.gov/air_traffic/publications/atpubs/aim_html/chap8_section_1.html Checked 2026-10-10.

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