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Features August 2015 Issue

RVR is not Visibility

The FAA helps us confuse runway visual range (RVR) with flight visibility, but they’re different concepts. RVR is an instrumentally-derived value at a runway. Flight visibility is a pilot-observed distance in flight. Regulation §91.175 is clear—flight visibility is required to descend below DA/MDA. Yet, approach charts confusingly equate the two by providing both RVR and visibility values.

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