Aviation English
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What is Compass deviation?

Compass deviation Error between magnetic compass indication and actual magnetic heading exceeding permissible limits; requires calibration swing.

Source: ICAO Doc 9432, FAA PCG

How is “Compass deviation” Used in Practice?

Tower, TANGO three zero, compass deviation exceeds limits after maintenance; request back-taxi for compass swing calibration.

Certification Exam Relevance

ICAO Level 4ICAO Level 5ICAO Level 6EASA FCL.055

Who Needs to Know This Term?

  • Pilots
  • Air Traffic Controllers
  • Cabin Crew

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Frequently Asked Questions

What is Compass deviation?

Error between magnetic compass indication and actual magnetic heading exceeding permissible limits; requires calibration swing.

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