For standard formation flight, how much should be added to the radar minima for separation between formations?

In standard formation flight, it is essential to maintain safety and proper separation between aircraft. The correct addition to radar minima for separation between formations is 1 mile. This additional mile accounts for the unique dynamics of formation flying, where multiple aircraft operate closely together, potentially altering their individual radar signatures and making it more challenging for air traffic control to ensure adequate separation.

Adding this distance helps mitigate the risk of wake turbulence and ensures that the aircraft in formation have a safe buffer should there be any unexpected maneuvers. It enhances situational awareness for both pilots and controllers and supports the overall safety of air traffic operations in areas where formations are present.

The other options represent greater distances that, while they could provide additional buffer, are unnecessary for the standard separation required in formation flying. Therefore, the 1-mile addition aligns perfectly with safety protocols and regulations governing this specific type of operation.