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 (1800 submarine) Nautilus (1800 submarine) Nautilus was a submarine first tested in 1800. Though preceded by Cornelis Drebbel's vessel of 1620, "Nautilus" is often considered to be the first practical submarine. "Nautilus" was designed between 1793 and 1797 by the American inventor Robert Fulton, then living in the French First Republic. He unsuccessfully proposed to the Directory that they subsidize its construction as a means to balance British seapower. His second, also unsuccessful, proposal to them was that he be paid nothing until "Nautilus" had sunk British shipping, and then only a small percentage of the prize money. Fulton directed his next