What additional distance is required for separation between two standard formation flights?

The requirement for additional distance between two standard formation flights is established to ensure safe separation and avoid potential wake turbulence hazards. The correct answer indicates a standard precautionary distance used in air traffic management to maintain safe operations between aircraft flying in formation.

When two aircraft are flying in a standard formation, they may create additional aerodynamic effects that can influence the performance and control of nearby aircraft. Therefore, a distance of 3 miles is necessary to account for these factors, allowing sufficient time and space for air traffic controllers to manage the separation adequately.

This standard is vital for ensuring the overall safety of aircraft operations and minimizing the risk of incidents resulting from wake turbulence or unexpected flight maneuvers. The other choices do not align with established operational practices for separation between standard formation flights, reflecting either insufficient distance or overly conservative measures. By establishing a clear 3-mile standard, air traffic control can effectively maintain safe operational distances in busy airspaces.