What is the basic radar separation between successive IFR departures?

• A. 5 NM
• B. 3 NM
• C. 2 NM
• D. 4 NM

Answer: (B)

Three nautical miles is the basic radar separation between successive IFR departures. This horizontal gap gives the trailing aircraft enough room to climb, accelerate, and establish its own flight path without coming too close to the lead aircraft. It also provides the controller with a safe buffer to detect any speed or heading changes and make timely adjustments if needed. While 3 NM is the standard starting point, controllers can increase separation to 4 or 5 NM under crowded conditions, weather, wake turbulence, or other safety considerations. The other distances are not the standard basic separation for this situation, though they might be used in special circumstances.