ClipArt ETC
"Torpedo Boats are small vessels built for speed and fitted with tubes for firing torpedoes by either compressed air or gunpowder. They can be used on the surface or submerged to do their work unseen beneath the water. A, storage batteries; C, bulkheads; E, vertical tubes, with horizontal propellers; G, rudders; H, horizontal fin; M, electric motor; R, water tanks; P, weight to be dropped in an emergency. "—(Charles Leonard-Stuart, 1911)

Electric Torpedo Boat

"Torpedo Boats are small vessels built for speed and fitted with tubes for firing torpedoes by either…

Sectional view of a submarine.

Submarine

Sectional view of a submarine.