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) proposal to the Minister of Marine, who granted him permission to build. Fulton built the first "Nautilus" of copper sheets over iron ribs at the Perrier boatyard in Rouen. It was long and in the beam. Propulsion was provided by a hand-cranked screw propeller. The hollow iron keel was the vessel's ballast tank, flooded and emptied to change buoyancy. Two horizontal fins, diving planes in modern terms, on the stubby horizontal rudder controlled angle of dive. Overall, "Nautilus" resembled a modern research submarine, such as the NR-1, having a long teardrop hull. The design included an observation dome, somewhat similar