What tool helps controllers monitor the spacing and movement of aircraft?

• A. A flight plan database
• B. A radar system
• C. Direct pilot reports
• D. Ground observation cameras

Answer: (B)

The radar system is essential for air traffic controllers as it provides real-time information about the position, speed, and altitude of aircraft within the controlled airspace. This tool uses radio waves to detect and track multiple aircraft simultaneously, allowing controllers to ensure safe distances are maintained between them. By displaying the aircraft's flight trajectories on a screen, the radar system facilitates effective coordination of their movements, helping to prevent potential collisions and manage traffic flow efficiently.

While the flight plan database organizes and stores flight plans, it does not actively monitor real-time aircraft movements. Direct pilot reports can provide valuable information but are dependent on pilots communicating their positions, which might not cover all aircraft consistently. Ground observation cameras may assist with visual confirmation on the ground but do not offer comprehensive tracking capability in the airspace like a radar system does.