8. A Magnetic Detonator That Was a Great Idea

Designed in 1931, the Mark 14 Torpedo was American submarines’ standard weapon when the country joined WWII in 1941, and it failed the submariners miserably. Unlike earlier American torpedoes that detonated on impact with a target ship’s hull, the Mark 14 Torpedo had an advanced magnetic detonator. It was supposed to set off the torpedo’s explosive charge directly beneath the enemy’s keel and break its back – fatal damage to any ship. The concept was good, since it meant that a single Mark 14 could sink any enemy ship, regardless of its size. By contrast, earlier designs often required multiple torpedo hits on various spots in a targeted ship’s hull in order to hole and sink it.



