What is the minimum required separation between aircraft when they are 40 miles or more from the radar antenna?

The minimum required separation between aircraft that are 40 miles or more from the radar antenna is 5 miles. This standard reflects the need for safe distance management in air traffic control, ensuring sufficient space to account for any potential deviations in aircraft flight paths.

When aircraft are within this range from the radar antenna, the probability of accurate radar detection and tracking improves, which supports the required separation distances. The 5-mile separation also accommodates fluctuations in speed and maneuverability, contributing to the overall safety and efficiency of air traffic operations.

Other distances provided as options may not align with established regulatory standards and safety protocols for maintaining airspace integrity, which is critical for preventing mid-air collisions and facilitating smooth air traffic flow.