What is International Standard Atmosphere Deviation?
International Standard Atmosphere Deviation The difference between the actual atmospheric temperature and the standard temperature defined by the International Standard Atmosphere at a given altitude.
Source: ICAO Doc 9432, FAA PCG
How is “International Standard Atmosphere Deviation” Used in Practice?
Report ISA deviation in degrees Celsius at flight level three five zero.
Certification Exam Relevance
Who Needs to Know This Term?
- Pilots
- Air Traffic Controllers
- Cabin Crew
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What is International Standard Atmosphere Deviation?
The difference between the actual atmospheric temperature and the standard temperature defined by the International Standard Atmosphere at a given altitude.
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