RNAVlähestymisjärjestelmä

RNAV approaches, also known as Area Navigation approaches, are a type of instrument approach procedure that allows aircraft to fly curved or non-straight paths to a runway. Unlike traditional non-precision approaches that rely on a series of ground-based radio beacons to define the flight path, RNAV approaches utilize a Global Navigation Satellite System (GNSS) or other onboard navigation systems. This enables greater flexibility in designing approach paths, allowing them to avoid obstacles, navigate complex airspace, and fly more direct routes. RNAV approaches are often designated by "RNAV" followed by the runway designation, such as RNAV RWY 27. They can be classified as either precision or non-precision approaches depending on the available vertical guidance. Precision RNAV approaches provide vertical guidance, similar to an Instrument Landing System (ILS), while non-precision RNAV approaches do not. Pilots using RNAV approaches must ensure their navigation equipment is certified and up-to-date, and they must be proficient in its operation. These approaches significantly enhance safety and efficiency by providing more precise and flexible routing to airports, especially in areas where traditional navigation aids are limited or unavailable.