Plain English Meaning
A segment of an instrument procedure where the aircraft flies a set heading until it is a certain distance from a ground station, then the segment ends.
Full Definition
An ARINC 424 path and terminator leg in which the aircraft flies a specified magnetic heading until it reaches a defined DME (Distance Measuring Equipment) distance from a referenced navaid. The leg ends when the DME distance is reached, regardless of position or track.
Context Anchor
Seen in the coded leg types used to build instrument departure, arrival, and approach procedures.