Resumen
Area navigation (RNAV) and other appropriate navigation specifications of the ICAO Performance Based Navigation concept represents a significant shift from conventional radio navigation to navigation primarily based on the Global Navigation Satellite System (GNSS), which is poised to become the primary, and potentially only, means of air navigation. Here we demonstrate that using RNAV to define routes in one airspace sector over Croatia can reduce the number of potential conflicts between aircraft and thereby increase flight efficiency. At the same time, this can reduce the costs associated with air traffic management, thereby increasing effectiveness.