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Area navigation (RNAV, usually pronounced as / ˈ ɑːr n æ v / "ar-nav") is a method of instrument flight rules (IFR) navigation that allows an aircraft to choose any course within a network of navigation beacons, rather than navigate directly to and from the beacons. This can conserve flight distance, reduce congestion, and allow flights ...
Area navigation (RNAV) and RNP systems are fundamentally similar. The key difference between them is the requirement for on-board performance monitoring and alerting. A navigation specification that includes a requirement for on-board navigation performance monitoring and alerting is referred to as an RNP specification.
ICAO performance-based navigation (PBN) specifies that aircraft required navigation performance (RNP) and area navigation (RNAV) systems performance requirements be defined in terms of accuracy, integrity, availability, continuity, and functionality required for the proposed operations in the context of a particular airspace, when supported by the appropriate navigation infrastructure.
RNAV routes are depicted in blue on low and high altitude charts produced by the FAA's Aeronautical Navigation Products. In addition to the published RNAV routes, if radar monitoring and traffic flow allow, air traffic controllers may approve random RNAV routes for IFR flights. [9]
An area navigation (RNAV) system is an onboard computer with display and may include an up-to-date navigation database. At least one VOR/DME station is required for the computer to plot aircraft position on a moving map or to display course deviation and distance relative to a waypoint (virtual VOR station).
PBN comprises area navigation (RNAV) and required navigation performance (RNP). With RNAV, equipped aircraft fly any desired path within the coverage of ground- or space-based navigation aids, within the capability of aircraft equipage, or both. RNP is an advanced form of RNAV. Aircraft must be equipped to monitor onboard navigation performance ...
Area navigation (RNAV) STAR/FMSP procedures for arrivals serve the same purpose but are used only by aircraft equipped with flight management systems (FMS) or GPS. The purpose of both is to simplify clearance delivery procedures and facilitate transition between en route and instrument approach procedures. [1]
GNSS makes navigation precision once reserved to large RNAV-equipped aircraft available to the GA pilot. Recently, many airports include GNSS instrument approaches. GNSS approaches consist of either overlays to existing precision and non-precision approaches or stand-alone GNSS approaches.