What is the purpose of RNAV?

RNAV, or Area Navigation, is designed to allow aircraft to fly directly between waypoints, which are predefined geographic locations or coordinates. This capability provides pilots with greater flexibility in flight routing, enabling them to efficiently navigate through airspace by selecting their own flight paths based on available waypoints rather than being limited to flying directly to and from navigational aids like VORs (VHF Omnidirectional Range stations).

By utilizing RNAV, pilots can take advantage of shortcuts, avoid congested airspace, and maintain more efficient flight paths that can lead to time savings and reduced fuel consumption. This system also aids in enhancing the overall system efficiency by optimizing the air traffic flow.

The other options, while essential in aviation, do not accurately describe the primary purpose of RNAV. For instance, measuring fuel efficiency, maintaining air traffic control boundaries, or enhancing communication are important but not directly related to the fundamental function of RNAV, which is primarily about navigation efficiency between waypoints.