Description

The Wide Area Augmentation System (WAAS) provides extremely accurate navigation capability by augmenting the Global Positioning System (GPS). It was developed for civil aviation by the Federal Aviation Administration (FAA) and covers most of the U.S. National Airspace System (NAS) as well as parts of Canada and Mexico. WAAS provides service for all classes of aircraft in all phases of flight - including enroute navigation, airport departures, and airport arrivals. This includes vertically guided landing approaches that can be used in Instrument Meteorological Conditions (IMC).