Definition
Avionics units capable of area navigation (RNAV), meaning they can compute the aircraft's position and guide it directly between any two points in space, rather than only along signals radiating from ground-based navigation stations. In the context of VFR waypoints, these are the receivers — typically GPS or multi-sensor RNAV units — that can store and navigate to waypoints defined purely by latitude and longitude.
Plain English
Cockpit equipment that can navigate directly to any point on the map by its coordinates, instead of only flying to or from ground stations like VORs.
Context Anchor
Seen when using VFR waypoints, GPS navigation, and route planning in the cockpit.
Derivation
Area navigation (RNAV) is named in contrast to older systems that forced pilots to navigate along the narrow 'airways' radiating from ground stations. RNAV opened up the whole 'area' of airspace — the pilot could fly point-to-point anywhere within the coverage area, not just along fixed radials.
Why Pilots Care
They allow flexible direct routing and accurate position awareness when flying away from established airways or navaids.
Intuition Check
Do not read “area navigation” as simply looking around an area and navigating visually. Here it means the equipment can guide the aircraft between selected points, even when those points are not ground radio stations.
Example Sentence 1
VFR waypoints can only be loaded and flown using area navigation receivers, such as a panel-mounted GPS.
Example Sentence 2
Area navigation receivers provided continuous position updates even after the aircraft left the coverage of the nearest VOR station.