What does the "Paintback" procedure involve?

The "Paintback" procedure is primarily involved in displaying an aircraft's track data on radar. This technique allows air traffic controllers to visualize the position and movement of aircraft in the airspace, enhancing situational awareness and ensuring safe separation between aircraft. This visualization of track data is crucial for monitoring the real-time positions of aircraft, especially in busy airspace or during complex operations.

The other options relate to different aviation procedures or functionalities. For instance, switching communication frequencies would typically refer to standard radio operations and not specifically to track visualization. Landing clearance procedures are focused on the communication and authorization process for an aircraft to land, which does not pertain to tracking data on radar. Visual indications for aircraft speed involve instrumentation within the aircraft itself rather than the radar-assisted monitoring of track data, which is the specific focus of the Paintback procedure.