According to radar procedures, what is considered a best practice for monitoring aircraft?

Monitoring aircraft effectively requires a systematic and technological approach to ensure safety and efficiency in air traffic management. Systematic flight following using radar technology involves consistently using radar capabilities to track the position and movement of aircraft. This method increases situational awareness for air traffic controllers and enhances the ability to ensure the safe separation of aircraft, especially in crowded airspace.

By utilizing radar, controllers can obtain real-time data on aircraft locations, altitudes, and speeds, allowing them to respond promptly to any changes or potential emergencies. This practice is integral to modern aviation, where fast-paced decision-making is crucial.

The other choices do not encompass the recommended and proactive approach that radar provides. Keeping track of communications alone does not give a complete picture of an aircraft's position or trajectory. Visual flight rules can be useful but rely heavily on the pilot's ability to see and avoid obstacles, which may not always be feasible in poor weather conditions. Avoiding interaction with pilots altogether counters the principles of effective air traffic management, as communication is essential for ensuring safety and coordinating actions.