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The U-5 class was a class of three submarines or U-boats that were operated by the Austro-Hungarian Navy (German: Kaiserliche und Königliche Kriegsmarine or K.u.K. Kriegsmarine) before and during World War I. The class was a part of the Austro-Hungarian Navy's efforts to competitively evaluate three foreign submarine designs.
The boat was commissioned into the Austro-Hungarian Navy in August 1909, and served as a training boat—sometimes making as many as ten cruises a month—through the beginning of the First World War in 1914. At the start of that conflict, she was one of only four operational submarines in the Austro-Hungarian Navy U-boat fleet.
The Austro-Hungarian U-boat fleet was created in the decade prior to the First World War.They were built to a variety of designs, many under licence from Germany. 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.
In June, U-5 helped search for the lost Austro-Hungarian seaplane L 41, and in July, received an upgrade of her deck gun to a 4.7 cm (1.9 in) QF gun. [5] In early August, U-5 was sent out from Lissa when the Austro-Hungarian Navy received word from a reconnaissance aircraft that an Italian submarine had been sighted at Pelagosa. [17]
As a result, German U-boats operating in Mediterranean were assigned Austro-Hungarian numbers and flags. In some cases the same Austro-Hungarian numbers were assigned to different German U-boats. After 28 August 1916, when Germany and Italy were officially at war, the practice continued, primarily to avoid charges of flag misuse.
The Austro-Hungarian Army and Navy were subsequently demobilized on 28 May 1913. [32] After demobilization, both submarines of the U-1 class resumed their duties as training vessels. During one of these training cruises on 13 January 1914 near Fasana, U-1 was accidentally rammed by the Austro-Hungarian armored cruiser Sankt Georg.
By December 1912, the Austro-Hungarian Navy had, in addition to U-1 and U-2, a total of seven battleships, six cruisers, eight destroyers, 28 torpedo boats, and four submarines ready for combat. [22] The crisis eventually subsided after the signing of the Treaty of London , and the Austro-Hungarian Army and Navy were subsequently demobilized on ...
Austria-Hungary's U-boat fleet was largely obsolete at the outbreak of World War I. [2] The Austro-Hungarian Navy satisfied its most urgent needs by purchasing five Type UB I submarines that comprised the U-10 class from Germany, [3] by raising and recommissioning the sunken French submarine Curie as U-14, [2] [Note 1] and by building four submarines of the U-20 class that were based on the ...