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USS Michigan (BB-27)
USS ''Michigan'' (BB-27), a , was the second ship of the United States Navy to be named in honor of the 26th state. She was the second member of her class, the first dreadnought battleships built for the US Navy. She was laid down in December 1906, launched in May 1908, and commissioned into the fleet in January 1910. ''Michigan'' and ''South Carolina'' were armed with a main battery of eight guns in superfiring twin gun turrets; they were the first dreadnoughts to feature this arrangement.
''Michigan'' spent her career in the Atlantic Fleet. She frequently cruised the east coast of the United States and the Caribbean Sea, and in April 1914 took part in the United States occupation of Veracruz during the Mexican Civil War. After the United States entered World War I in April 1917, ''Michigan'' was employed as a convoy escort and training ship for the rapidly expanding wartime navy. In January 1918, her forward cage mast collapsed in heavy seas, killing six men. In 1919, she ferried soldiers back from Europe. The ship conducted training cruises in 1920 and 1921, but her career was cut short by the Washington Naval Treaty signed in February 1922, which mandated the disposal of ''Michigan'' and ''South Carolina''. ''Michigan'' was decommissioned in February 1923 and broken up for scrap the following year.
==Design==
(詳細はlong overall and had a beam of and a draft of . She displaced as designed and up to at full combat load. The ship was powered by two-shaft vertical triple-expansion engines rated at and twelve coal-fired Babcock & Wilcox boilers, generating a top speed of . The ship had a cruising range of at a speed of . She had a crew of 869 officers and men.
The ship was armed with a main battery of eight 12 inch /45 Mark 5 guns in four twin gun turrets on the centerline, which were placed in two superfiring pairs forward and aft. The secondary battery consisted of twenty-two 3-inch /50 guns mounted in casemates along the side of the hull. As was standard for capital ships of the period, she carried a pair of torpedo tubes, submerged in her hull on the broadside. The main armored belt was thick over the magazines, over the machinery spaces, and elsewhere. The armored deck was thick. The gun turrets had 12-inch thick faces, while the supporting barbettes had 10-inch thick armor plating. Ten-inch thick armor also protected the casemate guns. The conning tower had 12-inch thick sides.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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