What should be the time separation for a Category I aircraft departing after a Category H aircraft on the same runway?

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

Answer: (C)

The correct time separation for a Category I aircraft departing after a Category H aircraft on the same runway is 3 minutes. This requirement is based on established safety protocols that address the significant wake turbulence generated by larger aircraft, such as Category H (heavy) aircraft.

Category H includes aircraft such as the Airbus A380 and Boeing 747, which produce substantial wake turbulence due to their size and weight. When a Category I aircraft, which is typically smaller and lighter, is cleared for departure soon after a Category H aircraft, a sufficient time interval is crucial to allow the wake turbulence to dissipate adequately to ensure the safety of the departing aircraft.

The 3-minute separation ensures that the Category I aircraft can take off safely without risk of encountering the hazardous wake turbulence that can persist for several minutes following the departure of a heavy aircraft. This interval is determined by air traffic control standards and is vital in maintaining safe operational standards in busy airspace and on runways. Proper adherence to this separation guideline is essential to reduce the risk of accidents and maintain safe flight operations.