EntityQ816356· pop 20· linked from 1,592 articleshuman torpedoSign in to savetype of rideable submarine used as secret naval weapons in World War IIConnectionssurface supplied divingEntitydiving bellEntitydiving equipmentEntityDrägerwerkEntitydiving regulatorEntitydiving medicineEntitydiving weighting systemEntitydiving helmetEntityunderwater divingEntitydiving suitEntitydiving cylinderEntityprofessional divingEntitySCUBAEntitydiving chamberEntitybarotraumaEntitygas cylinderEntityfinswimmingEntitydive computerEntitydiving buoyancy compensatorEntitybreathing gasEntityCategoriesFrogman operationsItalian inventionsManned torpedoesNaval weapons of ItalyUnderwater diver propulsion equipmentWet subsWorld War II submarines of the United KingdomWorld War II weapons of Italy