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USS ''Ohio'' (BB-12), a pre-dreadnought battleship, was the third ship both of her class and of the United States Navy to be named for the 17th state. She was laid down at the Union Iron Works shipyard in San Francisco in April 1899, was launched in May 1901, and was commissioned into the fleet in October 1904. She was armed with a main battery of four guns and could steam at a top speed of . ''Ohio'' initially served in the Asiatic Fleet, from 1905 to 1907, when she returned to the United States. In December that year, she joined the Great White Fleet for its world cruise, which lasted until early 1909. She served with the Atlantic Fleet for the next four years conducting a peacetime training routine. In 1914, she was sent to Mexico to protect American interests in the country during the Mexican Revolution. She served as a training ship during America's involvement in World War I from 1917 to 1918. Thoroughly obsolete by that time, ''Ohio'' was decommissioned in July 1919, and was ultimately sold for scrap in March 1923 under the terms of the Washington Naval Treaty. ==Description== (詳細はlong overall and had a beam of and a draft of . She displaced as designed and up to at full load. The ship was powered by two-shaft triple-expansion steam engines rated at and twelve coal-fired Thornycroft boilers, generating a top speed of . As built, she was fitted with heavy military masts, but these were quickly replaced by cage masts in 1909. She had a crew of 561 officers and enlisted men, which increased to 779–813. The ship was armed with a main battery of four 12 inch /40 Mark 3 guns in two twin gun turrets on the centerline, one forward and aft. The secondary battery consisted of sixteen , which were placed in casemates in the hull. For close-range defense against torpedo boats, she carried six 3-inch /50 guns mounted in casemates along the side of the hull, eight 3-pounder guns, and six 1-pounder guns. As was standard for capital ships of the period, ''Ohio'' carried two torpedo tubes, submerged in her hull on the broadside. ''Ohio''s main armored belt was thick over the magazines and the machinery spaces and elsewhere. The main battery gun turrets had thick faces, and the supporting barbettes had the same thickness of armor plating on their exposed sides. Armor that was 6 in thick protected the secondary battery. The conning tower had thick sides. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「USS Ohio (BB-12)」の詳細全文を読む スポンサード リンク
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