What is the minimum time separation required for a Category I aircraft behind a Category E aircraft?

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

Answer: (B)

The minimum time separation required for a Category I aircraft following a Category E aircraft is set at 2 minutes. This requirement is grounded in safety protocols designed to manage wake turbulence and spacing adequately between different aircraft categories.

Category E aircraft are large and produce significant wake turbulence, which can pose a hazard to smaller aircraft, including those in Category I. The 2-minute interval allows sufficient time for the potential wake turbulence to diminish before the following Category I aircraft continues its approach. Additionally, this time frame helps ensure that the trailing aircraft has enough distance to maintain safe operational parameters and minimize the risk of an incident during landing or takeoff.

This standard is particularly important in busy air traffic environments where maintaining safe distances between aircraft is crucial for operational integrity and safety. Therefore, the choice of 2 minutes reflects established guidelines within aviation operations to effectively mitigate risks associated with wake turbulence and ensure safe landings and departures.