How many minutes should you separate a Category E aircraft departing behind a Category B departure if projected flight paths will cross?

• A. 1 minute
• B. 2 minutes
• C. 3 minutes
• D. 5 minutes

Answer: (B)

When dealing with the separation of aircraft, especially when their projected flight paths are set to cross, safety is the top priority. The correct answer is two minutes of separation for a Category E aircraft departing behind a Category B departure. This separation time is critical because Category B aircraft are generally smaller and have shorter takeoff distances compared to larger aircraft in Category E, which can include jumbo jets or heavily loaded aircraft.

The two-minute separation ensures that any initial difference in performance and climb rates is accommodated. This time interval allows the larger Category E aircraft enough space to gain altitude and airspeed, reducing the risk of wake turbulence and potential collision during the critical phases of departure. It also takes into account the different operational characteristics of these aircraft types, ensuring safe and efficient air traffic management.