The battleship USS Pennsylvania (BB-38) was a large, powerful American battleship of the Pennsylvania-class featuring twelve 14-inch guns in four triple turrets, two torpedo tubes, and an "all-or-nothing" armor scheme with a 13.5-inch belt. Powered by four Curtis steam turbines and twelve boilers, it could reach 21 knots and had a length of 608 feet. The ship was commissioned in 1916, survived the attack on Pearl Harbor in 1941, and was later sunk as a target in the 1946 atomic tests at Bikini A