What is the default RNAV route designation?

The default RNAV (Area Navigation) route designation is indeed RNAV 1. This designation indicates that the aircraft can navigate using area navigation systems that provide improved precision and flexibility in route planning and execution. RNAV 1 routes are typically used for standard terminal arrivals and departures, allowing for more efficient air traffic management and minimizing fuel consumption.

Identifying RNAV 1 as the default highlights its role in modern aviation practices, where precise navigation is essential for safety, efficiency, and optimization of airspace usage. It also underscores the increased capabilities of modern aircraft equipped with advanced navigation systems that meet the performance requirements specified for RNAV 1 operations.

The other designations—RNAV 0, RNAV 2, and RNAV 3—correspond to different levels of performance and operational capabilities. Each carries specific requirements and is utilized in various contexts depending on the intended use of the navigation system and the airspace in which the aircraft operates, but RNAV 1 remains the standard designation for most air traffic operations.