Typhoon: The Largest Submarine Ever Was Russia's Doomsday Machine The Typhoon-class submarines were nearly triple the size of their American counterparts and also housed the heaviest intercontinental ballistic missiles ever. The Typhoon-class easily dwarfs all other submarines. The mighty Ohio-class, the largest submarine ever built for United States Navy—nuclear powered and originally designed to conduct the United States’ nuclear deterrence patrols—is diminutive by comparison, only around a third the size of the mighty Typhoons. Like the Ohio-class, the Soviet Union built the Typ...