What is 'active traffic surveillance' used for?

Active traffic surveillance is primarily used to monitor aircraft movements and ensure safety in air traffic management. This involves the use of technologies such as radar systems, transponders, and ADS-B (Automatic Dependent Surveillance–Broadcast), which provide real-time information about the position, speed, and direction of aircraft. This data is crucial for air traffic controllers to effectively manage airspace, prevent collisions, and facilitate the safe and efficient flow of air traffic.

The focus of active traffic surveillance on safety helps mitigate risks associated with aircraft operations in busy airspace. By constantly tracking the position of aircraft, it enhances situational awareness for pilots and air traffic controllers alike, ultimately contributing to a higher safety standard in aviation.

Given the options provided, improving fuel management, regulating cabin pressure, and enhancing passenger communication do not fall under the primary functions of active traffic surveillance, as they relate to operational efficiencies, aircraft systems management, and passenger experience rather than air traffic safety monitoring.