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
Jules Verne translators often working in great haste to rush his most lucrative titles into English-language print. Unlike Hetzel, who targeted all ages with his publishing strategies for the "Voyages extraordinaires", the British and American publishers of Verne chose to market his books almost exclusively to young audiences; this business move, with its implication that Verne could be treated purely as a children's author, had a long-lasting effect on Verne's reputation in English-speaking countries. These early English-language translations have been widely criticized for their extensive textual omissions, errors, and alterations, and are not considered adequate representations of Verne's actual novels. The British