In what situation can simultaneous takeoffs be authorized for aircraft on non-intersecting runways?

• A. If one aircraft is a jet
• B. If runways diverge by at least 30 degrees
• C. If runways diverge by at least 15 degrees
• D. If one runway is longer

Answer: (C)

Simultaneous takeoffs can be authorized on non-intersecting runways if runways diverge by at least 15 degrees. This is due to safety considerations that account for the potential for wake turbulence and the flight paths of departing aircraft. A divergence of 15 degrees or more means that the trajectories of the aircraft will not significantly overlap, reducing the risk of collision in the air. This standard allows for efficient traffic flow, especially at busy airports, while ensuring that safety principles are maintained.

The specification of 30 degrees as an option reflects a more conservative approach, but it is not necessary as a requirement for simultaneous takeoffs under standard operating procedures as long as the 15-degree minimum is adhered to. Other incorrect choices suggest factors that do not directly influence the approval for simultaneous takeoffs, such as the type of aircraft or the length of the runway, rather than focusing on the critical factor of the degree of divergence between runways.