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HMS Holland 5
''Holland 5'' was the last of the five ''Holland''-class submarines ordered by the British Admiralty to evaluate the potential of the submarine with the Royal Navy. She was one of the first submarines to be accepted into Royal Navy service, and unique to her class, she carried one of the earliest periscopes. By the time she was launched, a number of A class submarines had already been ordered to replace this class in navy service.
She had a single hull design, built from "s" grade steel. She sank whilst under tow to the scrap yard in 1912, possibly caused by the torpedo hatch being left open. The wreck was rediscovered in 2000 and was protected under the Protection of Wrecks Act in 2005. Damage has been caused to the site in recent years, and at some point between September 2008 and June 2010, the torpedo hatch was stolen off the wreck.
==Design and description==
''Holland 5'' was the fifth of the experimental Holland class submarines to be launched, in 1902, at a cost of £35,000.〔 She was built by Vickers, Sons and Maxim in Barrow-in-Furness, under licence from Holland Torpedo Boat Company and to a design by John Phillip Holland.〔(【引用サイトリンク】url=http://www.rnsubs.co.uk/Boats/BoatDB2/index.php?id=2&BoatID=1&flag=class )〕 She was launched two months ahead of ''Holland 6'' (which was later designated ''A1'').〔(【引用サイトリンク】url=http://www.english-heritage.org.uk/discover/maritime/map/holland-no-5/ )〕 The British Holland class was an extension of the design used on USS ''Holland''.〔
She was equipped with one of the first periscopes; at the time of her launch, no other submarines in the Royal Navy or the United States Navy were so equipped.〔 It was of British design, which used a ball and socket joint on the hull to raise and lower the scope.〔 She was constructed of "s" grade steel, which at the time of her construction was only used on this class of submarine and the Forth Bridge. She utilised a single hull design, and so her pressure hull contained her fuel tanks, ballast and other internal workings.〔 However, she was limited to a maximum depth of .〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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