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 French scholars and writers, Verne's reputation skyrocketed in France. Roland Barthes' seminal essay "Nautilus et Bateau Ivre" ("The Nautilus and the Drunken Boat") was influential in its exegesis of the "Voyages extraordinares" as a purely literary text, while book-length studies by such figures as Marcel Moré and Jean Chesneaux considered Verne from a multitude of thematic vantage points. French literary journals devoted entire issues to Verne and his work, with essays by such imposing literary figures as Michel Butor, Georges Borgeaud, Marcel Brion, Pierre Versins, Michel Foucault, René Barjavel, Marcel Lecomte, Francis Lacassin, and Michel Serres; meanwhile, Verne's entire published