What is Freezing Level?
Freezing Level The lowest altitude in the atmosphere at which the air temperature drops to 0°C (32°F), marking the boundary where liquid water can freeze.
Source: ICAO Doc 9432, FAA PCG
How is “Freezing Level” Used in Practice?
Freezing level reported at seven thousand feet, caution for icing.
Certification Exam Relevance
Who Needs to Know This Term?
- Pilots
- Air Traffic Controllers
- Cabin Crew
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What is Freezing Level?
The lowest altitude in the atmosphere at which the air temperature drops to 0°C (32°F), marking the boundary where liquid water can freeze.
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