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USS ''Adder'' (SS-3) (later renamed ''A-2''), was one of seven ''Plunger''-class submarines built for the United States Navy (USN) in the first decade of the 20th century. ==Description== The ''Plunger''-class submarines were enlarged and improved versions of the preceding , the first submarine in the USN. They had a length of overall, a beam of and a mean draft of . They displaced on the surface and submerged. The ''Plunger''-class boats had a crew of one officer and six enlisted men. They had a diving depth of .〔Friedman, p. 306〕 For surface running, they were powered by one gasoline engine that drove the single propeller shaft. When submerged the propeller was driven by a electric motor.〔 The boats could reach on the surface and underwater.〔Gardiner & Gray, p. 127〕 The ''Plunger''-class boats were armed with one 18-inch (45 cm) torpedo tube in the bow. They carried two reloads, for a total of three torpedoes.〔 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「USS Adder (SS-3)」の詳細全文を読む スポンサード リンク
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