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The BL 4-inch gun Mk VII〔Mk VII = Mark 7. Britain used Roman numerals to denote Marks (models) of ordnance until after World War II. Mark VII indicates this was the seventh model of BL 4-inch gun.〕 was a British high-velocity naval gun introduced in 1908 as an anti-torpedo boat gun in large ships, and in the main armament of smaller ships.〔 It was also used as a defensive weapon on Defensively Equipped Merchant Ships (DEMS) during the Second World War.〔 ==Naval history== The guns armed the following warships : * s, laid down 1906 * s, laid down 1907 * scout cruisers, laid down 1907 * , laid down 1909 * battleships, laid down 1909 * s, laid down 1909 * s, laid down 1909 * s, laid down 1909 * ''Bristol''-class light cruisers, laid down 1909 * scout cruisers, laid down 1909 * scout cruisers, laid down 1910 * battleships, laid down 1911 The gun was succeeded in the "heavy" 4-inch class on new warships commissioned from 1914 onwards by the QF 4 inch Mk V. This new generation of warships were more heavily armed, and the BL Mk VII's role as secondary armament on capital ships and primary armament on cruisers was taken over by the BL 6 inch Mk VII and BL 6 inch Mk XII while the 4-inch calibre became the secondary armament on cruisers and primary armament on destroyers. In World War II many guns were used to arm merchant ships. 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「BL 4 inch naval gun Mk VII」の詳細全文を読む スポンサード リンク
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