What is the primary purpose of radar in air traffic control?

Answer: B — To detect and track aircraft positions and movements

The primary purpose of radar in air traffic control is to detect and track aircraft positions and movements. Radar systems are essential tools that allow air traffic controllers to monitor the airspace in real-time. By providing precise information about the location, speed, and direction of aircraft, radar helps ensure safe separation between them, prevents collisions, and facilitates the orderly flow of air traffic. Through the use of radar, controllers can visualize the positions of multiple aircraft on their screens, which is crucial for making informed decisions regarding routing, altitude changes, and overall air traffic management. This immediate and continuous tracking capability sets radar apart from other tools that might serve secondary functions in aviation, such as communication or scheduling. While managing flight schedules and providing weather updates are important aspects of air traffic operations, they do not directly pertain to the fundamental role of radar, which is to ensure safety by monitoring and tracking aircraft. Communication with aircraft is also a vital component of air traffic control, but it usually relies on voice radio or data links rather than on radar technology itself.