Definition
A predetermined geographical position used to define a segment of an instrument approach procedure flown using area navigation (RNAV). Each waypoint is identified by latitude and longitude coordinates and serves as a fix marking the beginning, end, or transition point of an approach segment, such as the initial approach fix, intermediate fix, final approach fix, or missed approach point.
Plain English
A fixed point in space, defined by GPS coordinates, that marks a specific stage of an instrument approach to a runway. The aircraft flies from one waypoint to the next, following a procedure designed to bring it safely down toward the runway in poor visibility.
Context Anchor
Seen on instrument approach charts and in panel navigation displays during instrument approaches.
Derivation
From 'waypoint' — a point along a way or route. The 'instrument approach' qualifier specifies that the waypoint belongs to a published procedure for landing using cockpit instruments rather than visual reference to the ground.
Why Pilots Care
Maintains precise navigation and compliance with published altitudes and paths, reducing risk during low-visibility landings.
Intuition Check
Do not think of a waypoint as something you must be able to see outside. An instrument approach waypoint is usually an invisible, defined point in space that the chart and aircraft navigation equipment use to guide the approach.
Example Sentence 1
After being cleared for the RNAV approach, the pilot confirmed each instrument approach waypoint was loaded in the correct sequence in the GPS.
Example Sentence 2
The pilot confirmed arrival at the first instrument approach waypoint and began descent.