Which statement best describes WAAS in aviation?

• A. To improve weather data collection
• B. To enhance GPS accuracy and reliability for aviation
• C. To increase airspace restrictions
• D. To monitor runway incursions

Answer: (B)

WAAS is a satellite-based augmentation system that enhances GPS navigation for aviation by delivering corrections to reduce position errors and by broadcasting integrity information so pilots know when the GPS data can be trusted. A network of ground reference stations, a master control center, and geostationary satellites work together to provide more accurate, reliable, and available GPS signals, which supports precision approaches and improved en route navigation. This capability best describes WAAS: it enhances GPS accuracy and reliability for aviation. It isn’t about collecting weather data, increasing airspace restrictions, or monitoring runway incursions.