After shattering the traditional bottle of champagne across the bow of the U.S.S. Nautilus, First Lady Mamie Eisenhower and others gathered at the Electric Boat Yard of General Dynamics Corporation in Groton, Connecticut on January 21, 1954, watched as the world's first nuclear-powered submarine slipped into the Thames River. The submarine became the first commissioned nuclear-power ship in the U.S. Navy on September 30, 1954. The Nautilus went on to log a record number of hours and shatter many records. The most momentous of her feats was a four-day trip in 1958 when the Nautilus traveled submerged 1,830 miles under the Arctic polar ice cap.