Defending a space carrier in three dimensions

How should a seven-kilometer space carrier and the Stargate ship Destiny distribute their defences?

Place point-defence weapons around the hull, add a secondary battery, and protect the shuttle hangars inside the ship.

The fictional Destiny concentrates guns on its upper and lower surfaces, leaving gaps in point-defence coverage when threats approach from other directions. A seven-kilometer space carrier would need defensive weapons distributed around the hull rather than clustered on a single plane. Even an exploration ship designed for endurance still needs overlapping protection because its size and importance make it an obvious target. A later follow-up proposes a secondary battery on the dorsal hull and moves the shuttle hangars inside the protection of the ship. Firing arcs and layered defence become harder to manage when a craft can maneuver and receive attacks in three dimensions.