Tang-class submarine

Abstract is: The Tang-class submarines were the first submarines designed (under project SCB 2) and built by the United States Navy after WWII. They incorporated the best features of the high-speed German Type XXI U-boat and the venerable U.S. Navy fleet submarine. The Tang-class and the fleet submarines converted under the Greater Underwater Propulsion Power (GUPPY) program had much higher submerged performance than their predecessors, but were quickly surpassed by the nuclear-propelled submarines that entered service beginning in 1954.