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",
Jules Verne ATV because the thermal and power situation remained acceptable, this did not affect the mission. Visual inspection from the space station later confirmed that some thermal blankets had partially detached. Air trapped under the blankets during launch rapidly expanded as the ATV's altitude increased; more holes were added to future craft to fix this problem. Because "Jules Verne" was the first ATV, several on-orbit demonstration tests were performed in order to confirm that it was able to safely approach and dock with the ISS. After launch, the ATV spent three weeks in free flight. It successfully underwent Collision Avoidance Manoeuvre (CAM)