Definition
A method of navigation that allows an aircraft to fly any desired flight path within the coverage of ground- or space-based navigation aids, or within the limits of the capability of self-contained systems, rather than being restricted to flying directly to or from individual ground-based navigation stations.
Plain English
A way of navigating that lets a pilot fly directly between any two points, instead of being forced to zigzag from one ground station to the next.
Context Anchor
Seen in instrument flying, flight plans, instrument procedures, and GPS-based routes.
Derivation
‘Area’ here means ‘any point within an area,’ as opposed to ‘only along a fixed line between stations.’ The name was chosen to contrast with traditional navigation, which tied the aircraft to fixed airways defined by ground beacons. RNAV freed the route from those fixed lines.
Why Pilots Care
Allows shorter, more fuel-efficient routes and access to instrument approaches that do not rely on ground-based radio beacons.
Intuition Check
Area navigation does not mean casually navigating somewhere in a general area. It means using approved equipment to follow a defined path between points, even when that path is not tied directly to a ground station.
Example Sentence 1
The crew loaded the RNAV approach into the FMS and flew directly to the initial approach fix without tracking any ground-based navaids.
Example Sentence 2
During the arrival the aircraft used RNAV to fly a curved path between two fixes.