History of submarines few years before the US, and paralleled subsequent US development in this area. In the 1950s, nuclear power partially replaced diesel-electric propulsion. The sailing of the first nuclear-powered submarine, the USN ""Nautilus"" in 1955 was soon followed by similar British, French and Russian boats. Equipment was also developed to extract oxygen from sea water. These two innovations, together with inertial navigation systems, gave submarines the ability to remain submerged for weeks or months, and enabled previously impossible voyages such as the crossing of the North Pole beneath the Arctic ice cap by the USS "Nautilus" in 1958. Most of the
Submarine Voyage occur. The attraction ultimately reopened in June 2007 themed to Disney and Pixar's "Finding Nemo", and now operates as Finding Nemo Submarine Voyage. As initially conceived, the Submarine Voyage was to feature real fish and other sea creatures, though the idea proved to be unfeasible. A major portion of the ride simulated the voyage under the Arctic Ocean's polar ice cap undertaken by the nuclear submarine on August 3, 1958. The submarines followed a long guide rail through the following sections of the ride: As the guest enters the submarine, taped narrations play that help create an illusion that the