Decision Height
What is decision height?
Decision Height (DH) is a specified altitude during a precision approach—charted as a height above the runway threshold elevation—at which you must decide either to continue the approach (if you have the required visual references) or execute a missed approach. The key word is "height," meaning it is measured above the threshold rather than above sea level. Think of it as the go/no-go point on a precision approach, referenced to the threshold below you.
Also known as: DH <-> Decision Height
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Related terms
- datum
- datum (reference datum)
- dead reckoning
- decision altitude
- decompression sickness
- delamination
- density altitude
- departure procedure