Nuclear submarine nuclear-powered submarine was first proposed in the United States Navy by the Naval Research Laboratory's Ross Gunn in 1939. Construction of the world's first nuclear powered submarine was made possible by the successful development of a nuclear propulsion plant by a group of scientists and engineers at the Naval Reactors Branch of the Bureau of Ships and the Atomic Energy Commission. In July 1951 the U.S. Congress authorized construction of the first nuclear-powered submarine, "Nautilus", under the leadership of Captain Hyman G. Rickover, USN (sharing names with Captain Nemo's fictional submarine in Jules Verne's "Twenty Thousand Leagues Under the Sea",
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