Automatic Dependent Surveillance–Broadcast (ADS-B) is a surveillance technology used in aviation that allows aircraft to determine their position using satellite navigation. It then broadcasts this information, along with other data like speed and altitude, to air traffic control and other nearby aircraft. This enhances situational awareness and safety in the skies. ADS-B relies on the aircraft's onboard systems and does not require radar, making it more efficient and cost-effective. It is a key component of modern air traffic management, helping to improve the flow of air traffic and reduce the risk of mid-air collisions.