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AhaBulb: Stuff Everyone Should Know · ahabulb.com/pilot-heading-indicator-drift

Why must a basic heading indicator be realigned with the magnetic compass?

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  1. Precession makes it drift
  2. Static pressure makes it lag
  3. Pitot pressure makes it lead

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References

  1. Pilot's Handbook of Aeronautical Knowledge Chapter 8 www.faa.gov/sites/faa.gov/files/regulations_policies/handbooks_manuals/aviation/phak/10_phak_ch8.pdf Checked 2026-10-09.

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