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On Jan. 17,1955, the first nuclear powered submarine, '''USS Nautilus''' (SSN 571 ), put to sea for the first time and signaled her historic message "Underway on nuclear power." On her shakedown cruise Nautilus steamed submerged 1,300 miles from New London, CT, to San Juan, Puerto Rico, in 84 hours, the first time a submarine had maintained a high submerged speed for longer than one hour. After operating on nuclear power for more than two years and covering 62,562 miles (submerged more than half the time), Nautilus was refueled. A diesel-powered submarine would have used more than 2 million gallons of fuel oil during that period. The success of Nautilus ensured the future of nuclear power in the Navy.

On Jan. 17,1955, the first nuclear powered submarine, '''USS Nautilus''' (SSN 571 ), put to sea for the first time and signaled her historic message "Underway on nuclear power." On her shakedown cruise Nautilus steamed submerged 1,300 miles from New London, CT, to San Juan, Puerto Rico, in 84 hours, the first time a submarine had maintained a high submerged speed for longer than one hour. After operating on nuclear power for more than two years and covering 62,562 miles (submerged more than half the time), Nautilus was refueled. A diesel-powered submarine would have used more than 2 million gallons of fuel oil during that period. The success of Nautilus ensured the future of nuclear power in the Navy.