Flight Level
An altitude that uses a specific pressure datum of 1013.2 hPa. When descending, the altimeter is set from 1013.2 to local area QNH. When ascending through the transition level, the altimeter is set to 1013.2 hPa.
Definition: Flight Level
An altitude that uses a specific pressure datum of 1013.2 hPa. When descending, the altimeter is set from 1013.2 to local area QNH. When ascending through the transition level, the altimeter is set to 1013.2 hPa.
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