Separate an aircraft departing behind a Category B or D on a parallel runway separated by 2500 feet by how many minutes if flight paths will cross?

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

Answer: (B)

When managing the departure of an aircraft behind a Category B (small jets) or Category D (twin-engine jets) aircraft on parallel runways, the required separation time becomes critical, especially when their flight paths will cross. In such scenarios, a separation time of 2 minutes is necessary to maintain safe distances and avoid potential wake turbulence or loss of separation due to the flight trajectories of the departing aircraft.

This 2-minute interval allows for adequate spacing between the departing aircraft and the preceding Category B or D aircraft, considering their climb rates and the potential effects of wake turbulence that can affect the following aircraft significantly. The operational guidelines are structured to ensure that safety is paramount, particularly when flight paths intersect shortly after departure.