Plain English Meaning
A small display, located somewhere other than the navigation station itself, that shows whether the station is working properly.
Full Definition
A device installed at a location away from a ground-based navigation facility (such as a VOR, NDB, or ILS) that displays the operational status of that facility in real time, allowing personnel to monitor whether the facility is transmitting reliable signals.
Context Anchor
Seen in discussions of how FAA navigation facilities are monitored, especially when a control facility or monitoring station must know whether a navigation aid is usable.
Derivation
Remote means "at a distance," status means "the of something," and indicator means "a device that shows information." Together: a device that shows the current condition of something located elsewhere.