Definition
On a precision instrument approach, the height above the runway touchdown zone elevation at which the pilot must decide whether to continue the approach to land or execute a missed approach. The decision is based on whether the required visual references for the intended runway are distinctly visible and identifiable.
Plain English
The point on a precision approach where the pilot has to make a call: if they can see the runway environment clearly, they can keep going down to land. If they can't, they must climb away and try again or divert.
Context Anchor
Seen on instrument approach information, including precision radar approaches, where the controller guides the aircraft down toward the runway.
Derivation
From 'decision' (the moment of choice) and 'height' (measured above the touchdown zone, not above sea level). The wording reflects exactly what the pilot does at this point — make a decision.
Why Pilots Care
Reaching DH without visual contact requires an immediate missed approach to avoid controlled flight into terrain.
Intuition Check
DH is not a place to pause or level off. It is the point where the decision must already be made: continue only if you can see what you need to land safely; otherwise, go missed.
Example Sentence 1
Approaching DH on the ILS, the captain called 'minimums' and, with the approach lights in sight, continued to land.
Example Sentence 2
On the PAR approach the controller announced DH at 250 feet.