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SM ''UB-7'' was a German Type UB I submarine or U-boat in the German Imperial Navy ((ドイツ語:Kaiserliche Marine)) during World War I. She disappeared in the Black Sea in September 1916. ''UB-7'' was ordered in October 1914 and was laid down at the AG Weser shipyard in Bremen in November. ''UB-7'' was a little over in length and displaced between , depending on whether surfaced or submerged. She carried two torpedoes for her two bow torpedo tubes and was also armed with a deck-mounted machine gun. ''UB-7'' was originally one of a pair of UB I boats sent to the Austro-Hungarian Navy to replace an Austrian pair to be sent to the Dardanelles, and was broken into sections and shipped by rail to Pola in March 1915 for reassembly. She was launched in April and commissioned as SM ''UB-7'' in the German Imperial Navy in May when the Austrians opted out of the agreement.〔"SM" stands for "Seiner Majestät" ((英語:His Majesty's)) and combined with the ''U'' for ''Unterseeboot'' would be translated as ''His Majesty's Submarine''.〕 Although briefly a part of the Pola Flotilla at commissioning, ''UB-7'' spent the majority of her career patrolling the Black Sea as part of the Constantinople Flotilla. The U-boat sank one ship of in September 1915. In October, she helped repel a Russian bombardment of Bulgaria. She was considered for transfer to the Bulgarian Navy, but disappeared in late September 1916 before a transfer could take place. Her fate is officially unknown, but sources report that may have struck a mine or been sunk by a Russian airplane. == Design and construction == After the German Army's rapid advance along the North Sea coast in the earliest stages of World War I, the German Imperial Navy found itself without suitable submarines that could be operated in the narrow and shallow seas off Flanders.〔Miller, pp. 46–47.〕〔Karau, p. 48.〕 Project 34, a design effort begun in mid-August 1914,〔 produced the Type UB I design: a small submarine that could be shipped by rail to a port of operations and quickly assembled. Constrained by railroad size limitations, the UB I design called for a boat about long and displacing about with two torpedo tubes.〔〔A further refinement of the design—replacing the torpedo tubes with mine chutes but changing little else—evolved into the Type UC I coastal minelaying submarine. See: Miller, p. 458.〕 ''UB-7'' was part of the initial allotment of eight submarines—numbered to —ordered on 15 October from Germaniawerft of Kiel, just shy of two months after planning for the class began.〔〔Williamson, p. 12.〕 ''UB-7'' was laid down by Germaniawerft in Kiel on 30 November.〔 As built, ''UB-7'' was long, abeam, and had a draft of . She had a single Daimler 4-cylinder diesel engine for surface travel, and a single Siemens-Schuckert electric motor for underwater travel, both attached to a single propeller shaft. Her top speeds were , surfaced, and , submerged.〔 At more moderate speeds, she could sail up to on the surface before refueling, and up to submerged before recharging her batteries. Like all boats of the class, ''UB-7'' was rated to a diving depth of , and could completely submerge in 33 seconds. ''UB-7'' was armed with two torpedoes in two bow torpedo tubes. She was also outfitted for a single machine gun on deck. ''UB-7''s standard complement consisted of one officer and thirteen enlisted men.〔Karau, p. 49.〕 While ''UB-7''s construction neared completion in early March 1915, Enver Pasha and other Turkish leaders were pleading with their German and Austro-Hungarian allies to send submarines to the Dardanelles to help attack the British and French fleet pounding Turkish positions.〔Halpern, p. 116.〕 The Germans induced the Austro-Hungarian Navy ((ドイツ語:Kaiserliche und Königliche Kriegsmarine ''or'' K.u.K. Kriegsmarine)) to send two boats—its own Germaniawerft-built boats and —with the promise of ''UB-7'' and ''UB-8'' as replacements.〔Koburger, p. 82.〕 When work on ''UB-7'' and ''UB-8'' was complete at the Germaniwerft yard, they were both readied for rail shipment. The process of shipping a UB I boat involved breaking the submarine down into what was essentially a knock down kit. Each boat was broken into approximately fifteen pieces and loaded on to eight railway flatcars.〔 The boats were ready for shipment to the main Austrian naval base at Pola on 15 March, despite the fact that the Austrian pair was still not ready.〔 German engineers and technicians that accompanied the German boats to Pola worked under the supervision of Kapitänleutnant Hans Adam, head of the newly created U-boat special command ((ドイツ語:Sonderkommando)).〔 Typically, the UB I assembly process took about two to three weeks,〔 and, accordingly, ''UB-7'' was launched at Pola sometime in April.〔 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「SM UB-7」の詳細全文を読む スポンサード リンク
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