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Q. What is WAAS?

A. WAAS stands for the "Wide Area Augmentation System". The Wide Area Augmentation System (WAAS) is an FAA funded project to improve the overall accuracy and integrity of the GPS signal for flying in instrument meteorological conditions, primarily during the approach to landing phase of flight. It is a space-based system that broadcasts integrity information and correction data as determined by ground reference stations. At this time the system is still in the development stage with a goal of providing reliable signals with an accuracy of 7 meters (21-22ft) both horizontally and vertically 95+% of the time. Current tests have shown the actual accuracy to be on the order of 2-3 meters. For more information, go to http://gps.faa.gov/Programs/WAAS/waas.htm.

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