Separate an aircraft departing an intersecting runway behind a Category B or D departure by how many minutes if projected flight paths will cross?

• A. 1 minute
• B. 2 minutes
• C. 3 minutes
• D. 4 minutes

Answer: (B)

Departing an aircraft behind a Category B or D departure, when projected flight paths will intersect, requires a two-minute separation. This guideline ensures that there is adequate time for the aircraft to gain altitude and to avoid any potential conflict during takeoff and initial climb.

Category B and D aircraft generally have higher climb rates compared to other categories, but the two-minute separation gives the trailing aircraft a clear advantage to ensure that it can safely navigate the takeoff and climb-out without getting too close to the departing aircraft. This practice is crucial in maintaining safe distances in busy air traffic situations, where the risk of collisions must be minimized.

While other time intervals might be applicable under different scenarios or with different aircraft categories, the two-minute rule is specifically established for maintaining safe operations in this context.