What is the minimum separation requirement for a light aircraft behind a heavy aircraft?

The minimum separation requirement for a light aircraft following a heavy aircraft is established primarily to ensure safety and stability during flight operations. When a heavy aircraft takes off or lands, it generates significant wake turbulence, which can pose a risk to lighter aircraft.

This wake turbulence is caused by the vortices created at the wingtips of larger aircraft and can lead to severe conditions for smaller aircraft if they are too close behind. The rule specifies a separation of 6 miles to allow adequate time and distance for the wake turbulence to dissipate before the lighter aircraft arrives at the same location in airspace or on a runway. This distance acts as a safety buffer to reduce the chances of encounters with dangerous turbulence that could lead to loss of control.

This regulation is designed in accordance with standards from aviation authorities to help maintain safety in aircraft operations, especially in busy airspace environments where the risks of wake turbulence are heightened. Hence, the correct answer of 6 miles is not just a standard; it is a critical parameter for ensuring air safety.