Aircraft ceiling

aircraft ceiling

1. After U.S. weather observing practice, the ceiling classification applied when the reported ceiling value has been determined by a pilot while in flight within one and one-half nautical miles of any runway of the airport.

   
   

   Aircraft ceilings may refer to vertical visibility or obscuring phenomena aloft as well as to clouds, and are designated A in aviation weather observations.

   
   
2. The maximum altitude at which any given aircraft can be operated safely.

   
   

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