Short definition: RNAV, or Area Navigation, is a method of navigation that allows an aircraft to fly on any desired path within the coverage of ground-based aids or within the limits of self-contained navigation systems.
Detailed explanation: RNAV enables aircraft to follow routes that are not tied directly to flying from one radio beacon to another. Instead, the aircraft uses navigation data from sources such as GNSS, DME/DME, or inertial systems to calculate its position and track a programmed route accurately. This supports more direct routing, published departures, arrivals and approaches, and can reduce track miles and controller workload. In flight simulation, RNAV procedures depend on correct aircraft setup, current navigation data, and proper use of the flight management system. RNAV describes the navigation method itself, while performance requirements such as accuracy are defined separately under navigation specifications.
Key considerations:
- A practical limitation is that RNAV capability depends on the aircraft equipment, sensor availability, and procedure requirements.
- A common mistake is confusing RNAV with RNP, which adds onboard performance monitoring and alerting requirements.
- A real-world impact is that RNAV allows more efficient routes and supports modern SID, STAR, and approach design.
Further Reading: RNAV (Area Navigation) – Wikipedia
