Nautilus (Verne) from seawater) is the craft's primary power source for propulsion and other services. "Nautilus" is double-hulled, and is further separated into water-tight compartments. Its top speed is . Its displacement is submerged. In Captain Nemo's own words: "Nautilus" uses floodable tanks in order to adjust buoyancy and so control its depth. The pumps that evacuate these tanks of water are so powerful that they produce large jets of water when the vessel emerges rapidly from the surface of the water. This leads many early observers of "Nautilus" to believe that the vessel is some species of whale, or perhaps a
Nautilus (Verne) for ramming and destroying ships which are the targets of his piracy. The same book also features HMS "Sword", a small Royal Navy experimental submarine which is sunk after a valiant but unequal struggle with the pirate submarine. In the book "The Master of the World", Robur's secondary vehicle, "Terror", is a strange flying machine with submarine, automobile and speedboat capabilities. It briefly eludes naval forces on the Great Lakes by diving. Jules Verne's text in "20,000 Leagues under the Sea" provides a great deal of information about "Nautilus" as discussed on this page: Jules Verne's "Nautilus". Many artists and