What is the minimum altitude restriction for a low approach authorized over an aircraft in takeoff position?

For a low approach over an aircraft that is in a takeoff position, the minimum altitude restriction is established to ensure safety during flight operations. The correct altitude of 500 feet ensures that there is sufficient vertical separation between the aircraft executing the low approach and any potentially hazardous situations on the runway or in the vicinity of the takeoff position.

This altitude requirement is implemented to minimize the risk of wake turbulence and the effects of downwash, which can significantly affect the aircraft on the ground during the critical phases of takeoff. The clearance above the takeoff position allows the grounded aircraft to maintain its stability and control while also providing a safe margin for the aircraft approaching at a low altitude.

Other altitude options, such as 300, 400, or 600 feet, do not comply with the established safety protocols for low approaches, either being below the safe threshold or unnecessarily high. 500 feet strikes a balance between safety and operational efficiency, which is why it is recognized as the minimum altitude for such maneuvers.