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",
Old Pulteney Row To The Pole position on 25 August. It was the first time any surface vessel under human power had been to any pole position. The expedition was the first attempt at such a voyage and was made possible by the open water in the Arctic region in summer. According to the National Snow and Ice Data Center, part of the University of Colorado, the Arctic sea ice melted to its third smallest extent (since 1979, when satellite measurements began) in September 2010. Prior to 1979 ice extents are unreliable. The adventure was conceived by Scots adventurer Jock Wishart in 2007 when Wishart was