What is the primary purpose of ADS-B?

The primary purpose of ADS-B (Automatic Dependent Surveillance–Broadcast) is to broadcast an aircraft's GPS location to nearby aircraft. This system enhances situational awareness for pilots and improves safety by allowing aircraft to see each other's positions, which is particularly important in environments where traditional radar coverage may be limited.

By using GPS for position information, ADS-B provides accurate and timely updates on an aircraft's location, velocity, and other critical data, which is shared with other aircraft and ground stations. This capability is essential for avoiding collisions and enhancing the efficiency of air traffic management.

In contrast, while ADS-B does interface with air traffic control, the main function is about situational awareness between aircraft, which differentiates it from direct communication. Although ADS-B can facilitate the provision of traffic information and is integrated with weather data systems, its fundamental role centers on broadcasting an aircraft’s position.