Plain English Meaning
A section of the GPS that quickly shows you which airports are nearest to where you are right now, so you can pick one if you need to land soon.
Full Definition
A set of related screens within a panel-mount GPS navigator that displays the airports closest to the aircraft's present position, listed in order of distance, along with key information about each one such as bearing, distance, runway length, and available frequencies. The pilot can scroll through the list and select an airport to view further details or to load it as a direct-to destination.
Context Anchor
You use it when working with the GPS nearest-airport function, especially if you need to choose a nearby airport quickly.
Why Pilots Care
Gives the pilot an immediate list of usable airports for rapid decisions without manual searching.