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The Austro-Hungarian U-boat fleet during the First World War mainly consisted of German manufactured units transported by rail from Germany's northern shipyards to the Austrian ports on the Adriatic Sea. They served throughout the war against Italian, French and British shipping in the Mediterranean Sea with some success, losing eight of the twenty eight boats in service in return. Following the end of the war in 1918, all Austrian submarines were surrendered to the Entente powers, who disposed of them individually. As both Austria and Hungary became landlocked in the aftermath of the war, no Austrian or Hungarian submarines (or any other naval vessels) have been commissioned since. In some sources Austro-Hungarian U-boats are referenced with Roman numerals as a way to distinguish them from German U-boats with similar numbers, but the Austro-Hungarian Navy itself used Arabic numerals. There are gaps in the numbering for several reasons. One series of Austro-Hungarian U-boats under construction in Germany was sold and commissioned into the Imperial German Navy. In other cases, U-boats commissioned into the Imperial German Navy were temporarily assigned Austro-Hungarian numbers when they operated in the Mediterranean. One final reason, in the case of the unassigned ''U-13'', was superstition. This is a list of all U-boats commissioned into the Austro-Hungarian Navy. (Submarines on which construction was begun but which were not completed or commissioned during World War I are not included.) ==''U-1'' class== (詳細はsubmarines or U-boats named ''U-1'' and ''U-2'', which were built for and operated by the Austro-Hungarian Navy. The ''U-1''-class boats were built to an American design at the navy yard in Pola.〔Gardiner, p. 342.〕 The class was a part of the Austro-Hungarian Navy's efforts to competitively evaluate three foreign submarine designs.〔Gardiner, p. 340.〕 The two ''U-1''-class boats, both launched in 1909, were long and as built were each powered by two gasoline engines while surfaced, and two electric motors when submerged.〔 Neither boat was operational at the beginning of World War I because both were in drydock awaiting replacement diesel engines for their problematic gasoline engines.〔Gardiner, p. 341.〕 Beginning in 1915, both boats conducted reconnaissance cruises out of either Trieste or Pola until declared obsolete in early 1918. Both remained in service as a training boats at the submarine base on Brioni, but each was at Pola at the end of the war.〔Gibson and Prendergast, p. 388.〕 They were ceded to Italy as war reparations in 1920 and scrapped at Pola.〔 Neither submarine sank any ships during the war. 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「Austro-Hungarian U-boat classes」の詳細全文を読む スポンサード リンク
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