Definition
A method of navigation that allows an aircraft to fly any chosen flight path within the coverage of ground- or space-based navigation aids, or within the limits of self-contained aircraft systems, rather than being restricted to flying directly to or from individual navigation beacons. RNAV systems compute position from sources such as GPS, DME/DME, VOR/DME, or inertial reference units, and guide the aircraft along a series of defined waypoints.
Plain English
A way of navigating that lets the aircraft fly a direct route between any two points the pilot picks, instead of having to fly from one ground station to the next.
Context Anchor
Pilots encounter RNAV in ATC clearances, flight plans, instrument procedures, and charted routes that are built for satellite-based or onboard navigation equipment.
Derivation
"Area" is used here in contrast to "point-to-point." Traditional navigation forced aircraft to fly along lines between fixed ground stations. "Area" navigation means the aircraft can navigate anywhere within the area covered by its navigation sources, not just along those fixed lines.
Why Pilots Care
RNAV enables shorter, more fuel-efficient routes and supports modern GPS-based approaches to airports that lack traditional ground navigation equipment.
Intuition Check
RNAV does not mean “go anywhere you want.” It means flying an approved path using suitable navigation equipment and data.
Example Sentence 1
ATC cleared us direct to the destination using RNAV, saving about fifteen minutes over the airway routing.
Example Sentence 2
The aircraft used its RNAV capability to fly a curved path on the approach instead of a straight-in segment.