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Montana Class BattleshipThe United States Navy authorized five battleships of the Montana class (BB-67 through BB-71) under the 1940 "Two Ocean Navy" building program, funding them in 1941. They were the last of their kind ordered by the Navy. With an intended standard displacement of 60,500 tons, they were nearly a third larger than the preceding Iowa class, four of which were the final battleships actually completed by the United States. The Montanas were intended to carry twelve 16-inch (406 mm) 50-caliber guns, three more than the earlier class. Protection against underwater weapons and shellfire was also greatly enhanced. They would have been the only new World War II-era U.S. battleships to be adequately armored against guns of the same power as their own. To achieve these advances, the Montana class was designed for a slower maximum speed than the very fast Iowas and had a beam too wide to pass through the existing Panama Canal locks. Completion of the Montana class would have given the late 1940s Navy a total of seventeen new battleships, a considerable advantage over any other nation, or probable combination of nations. The Montanas also would have been the only American ships to come close to equalling Japan's massive Yamato. However, WWII's urgent requirements for more aircraft carriers, amphibious and anti-submarine vessels resulted in suspension of the Montanas in May 1942, before any of their keels had been laid. In July 1943, when it was clear that the battleship was no longer the dominant element of sea power, their construction was cancelled. The Montana class would have consisted of five ships, to be constructed at three Navy Yards: - Montana (BB-67), to be built at the Philadelphia Navy Yard, Pennsylvania;
- Ohio (BB-68), to be built at the Philadelphia Navy Yard;
- Maine (BB-69), to be built at the New York Navy Yard, Brooklyn, New York;
- New Hampshire (BB-70), to be built at the New York Navy Yard; and
- Louisiana (BB-71), to be built at the Norfolk Navy Yard, Portsmouth, Virginia.
General characteristics - Displacement: 60,500 tons (standard); 70,965 tons (full load)
- Length: 921 ft 3 in (280.8 m)
- Beam: 121 ft 2 in (36.9 m)
- Powerplant: 172,000 horsepower (128 MW) steam turbines, producing a 28 knot maximum speed
- Armament (Main Battery): Twelve 16 (406 mm) 50 caliber guns in four triple turrets
- Armament (Secondary Battery): Twenty 5 in (127 mm) 54 caliber guns in ten twin mountings (ten guns on each side of the ship)
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