When utilizing radar separation, what distance must aircraft maintain from the edge of the radar scope if they are 40 miles or more from the radar?

When utilizing radar separation, aircraft that are located 40 miles or more from the radar must maintain a distance of 5 miles from the edge of the radar scope. This requirement is in place to ensure safe separation and to account for the limitations in radar accuracy and potential signal degradation at greater distances. Maintaining this distance helps to mitigate the risks of undetected aircraft movements or inaccuracies in radar readings.

The guidelines ensure that there is a sufficient buffer surrounding the radar coverage area, allowing air traffic controllers to manage and monitor aircraft effectively. In contexts where aircraft operate beyond the primary radar visibility, such as at the thresholds of radar range, having an established separation distance is critical for maintaining overall safety in air traffic management. This adherence to the 5-mile requirement helps facilitate an organized and efficient air traffic control environment, particularly in busy airspace.