How long is the required time interval for departures from parallel runways separated by less than 2,500'?

The correct answer is a required time interval of 3 minutes behind a super aircraft for departures from parallel runways that are separated by less than 2,500 feet. This time interval ensures safe separation between departing aircraft, particularly when one of the aircraft is classified as a "super" (such as the Airbus A380 or Antonov An-225), which generates significant wake turbulence.

When a super aircraft takes off, the wake turbulence it produces can affect smaller aircraft following it. The 3-minute interval allows enough time for the wake turbulence to dissipate before the next aircraft takes off, significantly enhancing safety during departures.

In situations where aircraft are departing from runways that are closely spaced, adherence to these time intervals is critical for preventing accidents and ensuring that subsequent aircraft can take off safely without encountering disruptive air currents.