When a pilot requests to deviate from the 3-minute interval for an intersection takeoff, what must the controller do before granting clearance?

• A. Clear the aircraft immediately
• B. Issue a wake turbulence advisory
• C. Request the pilot to wait
• D. Provide traffic advisories

Answer: (B)

When a pilot requests to deviate from the standard 3-minute interval for an intersection takeoff, the controller must issue a wake turbulence advisory before granting clearance. This is crucial because taking off with a lesser interval could increase the risk of wake turbulence encounters, particularly if the preceding aircraft was of a larger type. By providing a wake turbulence advisory, the controller ensures that the pilot is aware of the potential for turbulence caused by any preceding aircraft, allowing them to take appropriate precautions for safety.

The other options do not adequately address the safety issues related to wake turbulence. Simply clearing the aircraft immediately could endanger the flight, while asking the pilot to wait does not communicate the essential information about wake turbulence risks. Providing traffic advisories, while important, does not specifically address the concerns posed by wake turbulence in the context of an intersection takeoff deviation.