Area Navigation (RNAV) is a system that allows navigation on any desired flight path, rather than one defined by ground-based fixed airways. An RNAV system can determine position by referencing the position of ground- or space-based navigation aids, such as the Global Positioning System (GPS), using onboard flight management computers.

Navigation system that allows for operation on any desired course within an area serviced by ground based navigation signals, or self contained airborne system

means a method of navigation that permits aircraft operations on any desired course within the coverage of station-referenced navigation signals or wi...

  Formerly called Random Navigation. A method of navigation that allows aircraft to choose any course within a network of navigation beacons, rather than navigating to/from the beacons.

A method of navigation which permits aircraft operation on any desired flight path within the coverage of station-referenced navigation aids or within the limits of the capability of self-contained aids, or a combination of these.