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SSK was the United States Navy hull classification symbol for a diesel-electric submarine specialized for anti-submarine duties. SS indicated that the vessel was a submarine, and the K suffix that it was a hunter-killer. The United States Navy does not currently operate any submarines of this type, and so the designation is inactive.〔(【引用サイトリンク】 Inactive Classification Symbols )〕 The start of the Cold War in the mid-1940s and the threat of Soviet submarines in the Atlantic led several Western navies to build or adapt submarines to specialize in hunting other submarines. The changes included streamlining to make them quieter and improved acoustic sensors. This type of vessel was given the classification SSK in United States service. The changes were eventually incorporated into all submarines, allowing the SSK role to be subsumed into the regular attack submarine role and the classification became obsolete. The only purpose-built ones were the three ''Barracuda''-class: * * * These were small submarines equipped with enhanced hydrophones and designed to lie in wait for Soviet submarines off the Russian coast. They were designed to be cheaply built for easy mass-production in the event of a war, and were all reclassified as SS or SST boats in 1959 when they were relegated to training duties. Seven World War II submarines were also given the SSK classification in the late 1940s following streamlining and sensor upgrades. These were: * * * * * * * ==Current uses== The Canadian navy operates diesel-electric hunter-killer submarines and uses this hull classification, for example the Canadian HMCS ''Victoria'' (SSK 876). The term SSK term is sometimes currently used to indicate a diesel-electric patrol submarine.〔For example in (【引用サイトリンク】 SSK Kilo Class (Type 636) Attack Submarine, Russia ) and 〕 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「SSK (hull classification symbol)」の詳細全文を読む スポンサード リンク
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