21.   Foreign publications say the Dolphin can launch squads of frogmen to mine ports and blow up ships, and that its sub-Harpoon missile can destroy enemy ships.

22.   Future drone subs, known as unmanned underwater vehicles, or UUVs, might even fire torpedoes at enemy ships or submarines.

23.   In wartime, the Frogmen specialize in high-risk missions such as boarding enemy ships and defusing mines.