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SMS ''Helgoland'', the lead ship of her class, was a dreadnought battleship of the German Imperial Navy. ''Helgoland''s design represented an incremental improvement over the preceding , including an increase in the bore diameter of the main guns, from 28 cm (11 in) to 30.5 cm (12 in). Her keel was laid down on 11 November 1908 at the Howaldtswerke shipyards in Kiel. ''Helgoland'' was launched on 25 September 1909 and was commissioned on 23 August 1911. Like most battleships of the High Seas Fleet, ''Helgoland'' saw limited action against Britain's Royal Navy during World War I. The ship participated in several fruitless sweeps into the North Sea as the covering force for the battlecruisers of the I Scouting Group. She saw some limited duty in the Baltic Sea against the Russian Navy, including serving as part of a support force during the Battle of the Gulf of Riga in August 1915. ''Helgoland'' was present at the Battle of Jutland on 31 May – 1 June 1916, though she was located in the center of the German line of battle and not as heavily engaged as the - and ships in the lead. ''Helgoland'' was ceded to Great Britain at the end of the war and broken up for scrap in the early 1920s. Her coat of arms is preserved in the Military History Museum of the Bundeswehr in Dresden. == Construction == (詳細はcoastal defense ship . The contract for the ship was awarded to Howaldtswerke in Kiel under construction number 500. Work began on 24 December 1908 with the laying of her keel, and the ship was launched less than a year later, on 25 September 1909. Fitting-out, including completion of the superstructure and the installation of armament, lasted until August 1911. ''Helgoland'', named for the offshore islands seen as vital to the defense of the Kiel Canal, was commissioned into the High Seas Fleet on 23 August 1911, just under three years from when work commenced, at a cost of 46.196 million gold marks. The ship was long, had a beam of and a draft of , and displaced at full load. She was powered by three vertical triple expansion steam engines, which produced a top speed of . ''Helgoland'' stored up to of coal, which allowed her to steam for at a speed of . After 1915 the boilers were modified to burn oil; the ship could carry up to of fuel oil. ''Helgoland'' was armed with a main battery of twelve guns in six twin gun turrets, with one turret fore, one aft, and two on each flank of the ship. The ship's secondary armament consisted of fourteen SK L/45 guns and sixteen SK L/45 guns. After 1914, two of the 8.8 cm guns were removed and replaced by 8.8 cm anti-aircraft guns. ''Helgoland'' was also armed with six submerged torpedo tubes. 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「SMS Helgoland」の詳細全文を読む スポンサード リンク
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