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Kingfisher-class sloop : ウィキペディア英語版 | Kingfisher-class sloop
The ''Kingfisher'' class was a class of nine patrol sloops of the British Royal Navy built in three groups of three each during the 1930s, that saw service during World War II, mainly on East coast convoys in the North Sea. == Design == The ''Kingfisher'' class was an attempt to build a small patrol vessel under 600 tons, such vessels being outwith the clauses of the London Naval Treaty of 1930. It was intended that it would escort coastal shipping in wartime. The design had a number of shortcomings, however. Firstly, it was designed to too high a standard; constructed to full naval warship specifications and powered by geared steam turbine engines, it was not suitable for mass production. Secondly, it was too small and short on range, and the hull-form, based on a scaled-down destroyer, was not suitable for open ocean work, where escorts were seriously lacking in numbers during wartime. Thirdly, armed originally with only a single 4-inch gun forward and depth charges aft, they were limited in their ability to defend themselves, or their charges.
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