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The Flower class comprised five sub-classes of sloops built under the Emergency War Programme for the Royal Navy during World War I, all of which were named after various flowers. They were popularly known as the "herbaceous borders". ==Fleet minesweepers== The "Flowers" were designed to be built at merchant shipyards, to ease the pressure on yards specializing in warships. The initial three groups were the first purpose-built fleet minesweepers, built with triple hulls at the bow to give extra protection against loss from mine damage when working. When submarine attacks on British merchant ships became a serious menace after 1916, the existing Flower-class minesweepers were transferred to convoy escort duty, and fitted with depth charges, as well as 4.7-inch naval guns. *''Acacia''-class sloop: first group to be built, in 1915. 24 vessels built in two batches of 12. Two sunk during the war. *''Azalea''-class sloop: 12 vessels built in 1915. Slightly modified ''Acacia's''; two sunk during the war. *''Arabis''-class sloop: 36 vessels built 1915, a further eight for French Navy. Five British, and one French vessel sunk. 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「Flower-class sloop」の詳細全文を読む スポンサード リンク
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