Aircraft operating within 50 miles of the monitoring antenna, and not within 10 miles on a designated approach, shall be separated by a minimum of?

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Radar separation relies on the accuracy and continuity of the surveillance data. In the zone within 50 miles of the monitoring antenna, the controller can maintain smaller separations because the radar provides reliable position updates. If the aircraft are not within 10 miles of a designated approach, the standard in this coverage area is three miles of separation between them. This balance keeps safe spacing while allowing more traffic flow where the radar picture is strong. The other distances are not appropriate in this specific radar-coverage scenario: five miles is larger than necessary here, and two miles or 1.5 miles would be too tight given typical radar accuracy and aircraft performance. Therefore, three miles is the correct minimum.