What is a primary function of GPS in aviation navigation?

The primary function of GPS in aviation navigation is to provide precise positional data. Global Positioning System (GPS) satellites transmit signals that allow aircraft to determine their exact location in three-dimensional space, including latitude, longitude, and altitude. This capability is essential for modern navigation, as it enables pilots to navigate accurately, maintain course, and improve safety by knowing their position relative to terrain and airspace boundaries.

The use of GPS significantly enhances navigational accuracy and efficiency compared to traditional methods. While other navigational aids and systems exist, such as VOR systems for radio navigation, GPS provides a level of precision that is critical for various phases of flight, including departure, en route navigation, and approach to landing.