What are typical radar separation minima in en-route airspace?

What are typical radar separation minima in en-route airspace?

• A. 5 NM lateral or 1000 ft vertical separation; greater near weather or complex airspace.
• B. 3 NM lateral or 500 ft vertical separation.
• C. 10 NM lateral or 2000 ft vertical separation.
• D. 2 NM lateral or 400 ft vertical separation.

Answer: (A)

Radar separation in en-route airspace relies on giving aircraft enough room to maneuver and to account for radar accuracy and timing. The typical baseline is five nautical miles of lateral separation or one thousand feet of vertical separation. This standard means two aircraft either maintain at least 5 NM side-by-side, or stay at least 1000 ft apart in altitude, and the controller can manage them safely with the radar data available. When weather or complex airspace is involved, the margin is increased to provide extra safety, so you’ll see greater separations in those situations. The other options propose tighter or different figures, but the standard starting point used in most en-route radar operations is 5 NM lateral or 1000 ft vertical, with larger minima applied as conditions demand.

Radar separation in en-route airspace relies on giving aircraft enough room to maneuver and to account for radar accuracy and timing. The typical baseline is five nautical miles of lateral separation or one thousand feet of vertical separation. This standard means two aircraft either maintain at least 5 NM side-by-side, or stay at least 1000 ft apart in altitude, and the controller can manage them safely with the radar data available. When weather or complex airspace is involved, the margin is increased to provide extra safety, so you’ll see greater separations in those situations. The other options propose tighter or different figures, but the standard starting point used in most en-route radar operations is 5 NM lateral or 1000 ft vertical, with larger minima applied as conditions demand.