What is the minimum separation distance required inside of 12 NM of the ship for aircraft not under positive control?

Answer: B — 5 miles

The minimum separation distance required inside of 12 nautical miles (NM) of a ship for aircraft not under positive control is 5 miles. This requirement is in place to ensure safety and reduce the risk of mid-air collisions when aircraft operate near naval vessels, particularly in congested airspace where flight paths may overlap. This distance helps to provide a buffer, allowing for the unpredictability of aircraft that are not operating under positive control, meaning they are not being actively managed by air traffic control. By maintaining a separation of 5 miles, it allows for enough reaction time and space to account for any unanticipated maneuvers by the aircraft, thereby enhancing the overall safety of operations in that operational environment. In contrast, the other options do not meet the standard set for separation distances in this context, making them unsuitable for ensuring the necessary level of safety required around naval operations.