Aviation English
Meteorology

What is Altimeter Setting to Mean Sea Level Pressure?

Altimeter Setting to Mean Sea Level Pressure The altimeter setting that corresponds to the atmospheric pressure at mean sea level. Referred to as QNH in ICAO phraseology.

Source: ICAO Doc 9432, FAA PCG

How is “Altimeter Setting to Mean Sea Level Pressure” Used in Practice?

Tower, confirm QNH 1013 set for altimeter setting to sea level pressure.

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 Altimeter Setting to Mean Sea Level Pressure?

The altimeter setting that corresponds to the atmospheric pressure at mean sea level. Referred to as QNH in ICAO phraseology.

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