What is a key benefit of WAAS?

The key benefit of WAAS, or Wide Area Augmentation System, is its ability to improve GPS accuracy. WAAS enhances the precision of GPS signals by providing real-time corrections to the satellite data, which can significantly increase the accuracy of position information. This is particularly important in aviation, as higher accuracy can enhance navigation and safety for both enroute flight and approaches to landing.

WAAS uses a network of ground reference stations that monitor GPS satellites, analyzing the data and sending the corrections back to the satellites, which then deliver these improved signals to users on the ground. This allows pilots to rely more heavily on GPS for navigation and instrument approaches, providing benefits such as the ability to perform approaches in low-visibility conditions.

While other options may relate to advancements in navigation and landing systems, they do not encapsulate the primary function of WAAS as strongly as the improvement of GPS accuracy does.