Definition
Navigation systems that allow an aircraft to fly along any chosen path within the coverage of position-referenced navigation aids, or within the limits of self-contained system capability, rather than being restricted to flying directly to or from ground-based navigation stations. RNAV systems compute the aircraft's position from sources such as GPS, DME/DME, VOR/DME, or inertial reference units, and then guide the aircraft along a series of defined waypoints that form a route.
Plain English
A type of navigation that lets a pilot fly directly between any two points in space, instead of having to fly station-to-station along ground-based beacons. The system figures out where the aircraft is and steers it along a route made of waypoints.
Context Anchor
Seen in instrument flying, especially in RNAV routes, departures, arrivals, and approaches.
Derivation
Area' here means 'anywhere within a defined area of coverage,' as opposed to traditional navigation which required flying along fixed airways defined by ground stations. The term was coined to contrast with point-to-point or station-to-station navigation.
Why Pilots Care
It enables shorter, more flexible routes that save fuel and time while supporting modern precision approaches.
Analogy
Traditional navigation is like driving only on numbered highways between specific towns. RNAV is like having GPS in the car: you can plot a direct route between any two addresses, regardless of which highways exist.
Intuition Check
“Area” does not mean the aircraft is just navigating somewhere in a broad general region. Here it means the system can guide the aircraft along specific point-to-point paths within the area where its navigation sources are usable.
Example Sentence 1
The flight plan used an RNAV route directly from the departure airport to the destination, bypassing the older airway structure entirely.
Example Sentence 2
During the approach briefing, the crew confirmed the Area Navigation (RNAV) system was loaded with the correct procedure.