RNP-SAAAR procedures use global positioning and inertial navigation reference systems to fly predetermined paths that have been loaded onto the aircraft’s flight management computer. The paths, which are navigated using the Flight Guidance Control System, allow pilots to fly safer, more direct and lower minimum approaches.

“In general, RNP-SAAAR procedures increase operational efficiency by providing better accessibility to airports located in either traffic-dense areas or where terrain or man-made obstacles adversely affect approach minimums when using traditional instrument approach standards,” said Jake Howard, senior experimental test pilot, Gulfstream.

This saves operators both time and fuel,” Howard continued. “Because of the more precise terminal area procedures, operators receive improved access and flexibility for point-to-point operations, which further enhances reliability and mission success during inclement weather, as well as reduces delays.”

RNP-approved aircraft systems not only navigate with a higher degree of accuracy, they also allow the flight crew to monitor the system’s navigational performance. If a certain performance objective isn’t met, the system alerts the crew. All of this results in improved safety, access, capacity, predictability and operational efficiency. RNP-SAAAR approaches also yield reduced fuel consumption and lower greenhouse gas emissions.

RNP-SAAAR is part of the FAA’s performance-based navigation (PBN) initiative, which uses emerging technologies and aircraft navigation capabilities to establish navigation specifications. These specifications are applied to an air-traffic route, instrument procedure or defined airspace and provide a basis for designing and implementing automated flight paths.