Plain English Meaning

A setting on the navigation unit that tells it you are flying an approach, so it tightens up the course needle to give you finer left-right guidance when you need to be very accurate near the runway.

Full Definition

A mode selection on a VOR/DME RNAV unit that configures the system for approach operations, providing increased course sensitivity (typically full-scale deflection at 1.25 NM each side of course) for precise tracking to a waypoint during an instrument approach.

Context Anchor

Seen on older VOR/DME RNAV control panels or mode selectors when setting up the equipment for an .