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U-48-class submarine
The ''U-48'' class was a class of four submarines or U-boats planned for the Austro-Hungarian Navy ((ドイツ語:Kaiserliche und Königliche Kriegsmarine ''or'' K.u.K. Kriegsmarine)) during World War I. The design of the boats was based on plans purchased from the German firm AG Weser in January 1916. The Navy authorized Cantiere Navale Triestino to begin construction of the submarines in Pola in September 1916. Only two of the planned four boats were laid down, but neither of them were launched or completed. Both incomplete submarines were scrapped after the war ended.
== Design ==
Austria-Hungary's U-boat fleet was largely obsolete at the outbreak of World War I,〔Gardiner, p. 341.〕 and over the first two years of the war the Austro-Hungarian Navy focused its efforts on building a U-boat fleet for local defense within the Adriatic. With boats to fill that need either under construction or purchased from Germany, efforts were focused on building submarines for operation in the wider Mediterranean, outside the Adriatic.〔
In January 1916 Cantiere Navale Triestino (CNT) purchased plans for an submarine from the German firm AG Weser of Bremen.〔 Austro-Hungarian Navy modifications to the plans resulted in a submarine that displaced surfaced and submerged. The boats were to be long with a beam of and a draft of . For propulsion, the design featured two shafts, with twin diesel engines of (total) for surface running at up to , and twin electric motors of (total) for submerged travel at up to . The ''U-48'' class boats were designed for a crew of 32 men.〔
The ''U-48'' design called for six torpedo tubes—four bow tubes and two stern tubes—and carried a complement of nine torpedoes. The original design specified two 90 mm/35 (3.5 in) deck guns, which were superseded by two 120 mm/35 (4.7 in) deck guns in plans for the third and fourth boats.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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