Flight ceiling

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A flight ceiling is the upper altitudinal limit at which any aircraft may fly given its mechanical abilities. For aviation purposes, ceiling is defined as the height (AGL) of the lowest broken or overcast layer aloft or vertical visibility into an obscuration. Refer to Aviation Weather Manual AC 00-6A.

The term service ceiling refers to the height at which an aircraft's rate of climb has fallen to 100 feet per minute, and is a guide to the maximum useful height the aircraft can attain.


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