Plain English Meaning
A button or page on the GPS that instantly shows you the airports nearest to where you are right now, so you can quickly see where you could land.
Full Definition
A built-in feature of a GPS navigation unit that automatically identifies and lists the airports closest to the aircraft's current position, typically ordered by distance, with bearing and basic airport information available for each. It is intended to give the pilot immediate access to nearby landing options, especially in an emergency.
Context Anchor
Seen on GPS units and avionics displays, especially when a pilot needs to find a nearby airport quickly during changes, concerns, or an abnormal .