For 10 points, name these naval vessels which dive underwater and have periscopes.
Nordenfelt was an early proponent of these, one of which was responsible for sinking the USS Housatonic. Early prototypes included one which attempted to sink the HMS Eagle. The third one built for the Confederacy was the H.L. Huntley. Robert Fulton was commissioned by Napoleon to build an one of these vessels called the Nautilus, which was also the name of the first nuclear powered one of these. One of them sank the Lusitania. U-Boats are a type of this kind of ship. For 10 points, name these naval vessels which dive underwater and have periscopes.
Nordenfelt was an early proponent of these, one of which was responsible for sinking the USS Housatonic.
{submarines} [prompt on {submersibles}]