What is the purpose of using WAAS in approach procedures?

Using WAAS, which stands for Wide Area Augmentation System, enhances positional accuracy during approach procedures. The primary function of WAAS is to provide precise navigation information by correcting the satellite signals received from the Global Positioning System (GPS). This is crucial for approaches as it allows aircraft to fly more accurately and closer to the runway, especially in challenging conditions.

The enhanced accuracy supports safer landing procedures by helping pilots to better determine their position relative to the runway. This increased precision is particularly beneficial in areas with limited ground-based navigational aids or in situations where precision approaches are necessary, contributing to improved safety and efficiency in aviation operations.

While other options may address aspects of approach procedures, they do not capture the core purpose of WAAS, which is fundamentally about improving the accuracy of positional information that pilots rely on during critical phases of flight.