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The Ruotsinsalmi-class minelayers were a two-strong class of minelayers in the Finnish Navy. Both ships were launched in 1940 and named after famous 18th-century sea battles between Sweden and Russia. == New minelayers for the navy == Funding for two new minelayers had been secured as early as in 1937, but instead the money was used to refurbish the garrison at Mäkiluoto. ''Riilahti'' was launched on December 14, 1940, three weeks after her sister ship ''Ruotsinsalmi''. The vessels differed somewhat, ''Riilahti'' having an extensively modified propulsion system and hull, compared to its sister vessel. Originally, the vessels were intended as escort minesweepers for the Finnish navy's coastal defence ships ''Ilmarinen'' and ''Väinämöinen'', and they were therefore designed with a draft of only 1.5 metres. The ships were armed with one 75 mm gun, one Bofors 40 mm guns and two Madsen 20 mm anti-aircraft cannons. The vessel had three mine dropping rails, and could carry about 100 mines. The ship could also hunt submarines, and was equipped with hydrophones, depth charge throwers and rails. The vessel was also strong enough to be able to tow minesweeping equipment. It was equipped with smoke generators so it could protect itself, and other near-by vessel from enemy vessels. 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「Ruotsinsalmi-class minelayer」の詳細全文を読む スポンサード リンク
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