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
UC3 Nautilus August 2008, "Nautilus" could sail on its own, as the main diesel engine drive train and steering was completed. On its maiden voyage, the submarine was driven by former crewmen of the now-defunct Royal Danish Navy submarine division. The objective was to sail "Nautilus" and evaluate her maneuverability, and the appraisal was favourable. In October 2008, Nautilus was submerged for the first time. "Nautilus" can be crewed by up to eight people for surface operation and four when diving. The submarine moves at five to six knots, depending on conditions and whether it was submerged. It has two tanks for