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The 250t-class were high-seas torpedo boats built for the Austro-Hungarian Navy between 1913 and 1916. A total of 27 boats were built by three shipbuilding companies, with the letter after the boat number indicating the manufacturer. There were small variations between manufacturers, mainly in the steam turbines used, and whether they had one or two funnels. The eight boats of the T-group, designated ''74 T'' – ''81 T'', were built by Stabilimento Tecnico Triestino, located at Trieste. The sixteen boats of the F-group, designated ''82 F'' – ''97 F'', were built by Ganz & Danubius at their shipyards at Fiume and Porto Re. The three M-group boats, designated ''98 M'' – ''100 M'', were manufactured by Cantiere Navale Triestino at Monfalcone. All 27 boats saw service in World War I, performing convoy, escort and minesweeping tasks, and anti-submarine operations. Although widely used during the war, the class suffered no losses, and available sources indicate they were only involved in a few engagements. In 1917, one of the guns on each boat was placed on an anti-aircraft mount. Under the terms of the Treaty of Saint-Germain-en-Laye, the boats were transferred to various countries, including seven to Romania, six to Portugal, six to Greece, and eight to the newly created Kingdom of Serbs, Croats and Slovenes (later Yugoslavia). By 1940, thirteen boats of the class had been lost or scrapped, including all six Portuguese boats. During World War II, the five remaining Greek boats were sunk by Axis aircraft during the German-led invasion of Greece in April 1941. The six surviving Yugoslav boats were captured by the Italians during the Axis invasion of Yugoslavia in April 1941, and were operated by the ''Regia Marina''. Immediately following the Italian capitulation in September 1943, one ex-Yugoslav boat was sunk by German aircraft, another was scuttled by its Italian crew, and a third fell into Allied hands. The rest were seized by the Germans. Of the boats taken over by the Germans, two were handed over to the Navy of the Independent State of Croatia, one of which was destroyed by Royal Navy Motor Torpedo Boats in 1944. The other was transferred to the Yugoslav Navy after World War II and continued to serve until 1959, when she was taken out of service. Another was operated by the German Navy ((ドイツ語:Kriegsmarine)) with a Croatian crew until she was sunk by Royal Air Force aircraft in 1945. The surviving Croatian boat was handed over to the Yugoslav Navy after the war and served until 1962. The remaining two Romanian boats performed escort tasks in the Black Sea before being taken over by the Soviet Navy, and serving in their Black Sea Fleet until the end of the war; they were finally stricken in late 1945. ==Background== In 1910, the Austria-Hungary Naval Technical Committee initiated the design and development of a coastal torpedo boat, specifying that it should be capable of sustaining for 10 hours. This specification was based on an expectation that the Strait of Otranto, where the Adriatic Sea meets the Ionian Sea, would be blockaded by hostile forces during a future conflict. In such circumstances, there would be a need for a torpedo boat that could sail from the Austro-Hungarian Navy base at Cattaro to the Strait during darkness, locate and attack blockading ships and return to port before morning. Steam turbine power was selected for propulsion, as diesels with the necessary power were not available, and the Austro-Hungarian Navy did not have the practical experience to run turbo-electric boats. 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「250t-class torpedo boat」の詳細全文を読む スポンサード リンク
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