Decision Height (DH)
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Definition
The altitude during a precision approach at which the pilot must decide to land or go around
Related Terms
Approach Procedure
A series of maneuvers used to align an aircraft with a runway for landing
Ceiling
The height of the lowest layer of clouds covering more than half the sky
Glideslope (GS)
The vertical component of an ILS providing descent guidance to the runway
Go-Around
An aborted landing where the aircraft applies full power and climbs away from the runway
Instrument Landing System (ILS)
A precision approach system using radio signals to guide aircraft to a runway in poor visibility
Missed Approach
A procedure followed when an aircraft cannot complete a landing approach safely
Visibility (VIS)
The greatest distance at which prominent objects can be identified with the unaided eye