What does WAAS stand for?

WAAS stands for Wide Area Augmentation System. It is a satellite-based augmentation system designed to improve the accuracy, integrity, and availability of the Global Positioning System (GPS) signals. WAAS achieves this by using a network of ground reference stations that monitor GPS signals and send correction data to geostationary satellites. This correction data is then transmitted back to users in the compatible aircraft, allowing for enhanced navigational precision particularly for approaches and landings in aviation.

By providing detailed corrections to GPS signals, WAAS enables pilots to rely on GPS for precision approaches, improving safety and efficiency in navigation. Understanding this concept is crucial for pilots, as it impacts flight planning and navigation accuracy.