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A BatDiv or BATDIV was a standard U.S. Navy abbreviation or acronym for "battleship division." The Commander of a Battleship Division was known, in official Navy communications, as COMBATDIV (followed by a number), such as COMBATDIV ONE. One of the Battleship Divisions active during the First World War was United States Battleship Division Nine which augmented the striking power of the Royal Navy's Grand Fleet in 1917-1918.〔For further details on Battleship Divisions in the First World War see Michael D. Besch, A Navy Second to None: The History of U.S. Naval Training in World War I, Issue 215 of Contributions in Military Studies, Greenwood Publishing Group, 2002〕 ==Pre-Second World War battleship divisions== Before the Second World War, the U.S. Navy battleship force was organized into five Battleship Divisions of three battleships each. Only two of these BATDIVs were composed of three battleships of the same class, but mixing battleships of separate two-ship classes to form three-ship BATDIVs was facilitated by the "Standard type battleship" concept of the US Navy, a design concept developed before 1922 calling for uniform top speed of 21 knots (39 km/h) and a tight tactical radius of 700 yards (640 m) for all battleships of the , , , and classes. Stationed at Pearl Harbor as part of the U.S. Pacific Fleet were three battleship divisions: and with (BatDiv 1); and with (BatDiv2); and , and (BatDiv 4). These nine battleships were intended to counterbalance the ten battleships of the Imperial Japanese Navy. At the time of the Pearl Harbor Attack, was in dry dock and was being refitted at Bremerton Navy Yard, Washington State. was mated with and at that time. The US Atlantic Fleet had a BATDIV (BatDiv 3) composed of , and and a training division (BatDiv 5) made up of the older battleships and with . BatDiv3 had been part of the Pacific Fleet until 20 May 1941 when its three ships were transferred to the Atlantc Fleet for Neutrality Patrol duty. 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「BatDiv」の詳細全文を読む スポンサード リンク
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