What type of surveillance does ADS-B provide?

Automatic Dependent Surveillance–Broadcast (ADS-B) provides a radar-like surveillance capability. This system enhances situational awareness by allowing aircraft to periodically broadcast their precise position, velocity, and other information derived from onboard navigation systems. Ground stations and other aircraft equipped with ADS-B receivers can then receive this data, creating a comprehensive, real-time picture of air traffic similar to traditional radar systems.

The radar-like element refers to its ability to track aircraft positions and movements, akin to radar monitoring, through continuous updates rather than relying solely on secondary radar signals. This is crucial for air traffic management, as it aids controllers in maintaining safe distances between aircraft and improving overall safety and efficiency in aviation operations.

Other types of surveillance, such as visual or passive surveillance, do not encapsulate the proactive broadcast of data characteristic of ADS-B. Visual surveillance relies on the human eye for observation, while passive surveillance systems detect signals from aircraft without actively providing positional data. Delayed surveillance does not apply here, as ADS-B provides real-time information rather than delayed updates.