HMS H47

{{Use dmy dates|date=December 2016}} {{Use British English|date=December 2016}} {{Infobox ship |section1={{Infobox ship/image | image = H47 submarine.jpg | image_caption = HMS ''H47'' }}

|section2={{Infobox ship/career | hide_header = | country = United Kingdom | flag = {{shipboxflag|United Kingdom|naval}} | name = HMS ''H47'' | owner = | namesake = | ordered = | builder = [[William Beardmore and Company]], [[Dalmuir]] | yard_number = | laid_down = 20 November 1917 | launched = 19 November 1918 | acquired = | commissioned = 25 February 1919 | decommissioned = | in_service = | out_of_service = | struck = | reinstated = | fate = Sunk after collision, 9 July 1929 }}

|section3={{Infobox ship/characteristics | hide_header = | header_caption = | class = [[British H-class submarine|H-class]] [[submarine]] | displacement =*{{convert|423|LT|t|0|abbr=on}} surfaced *{{convert|510|LT|t|0|abbr=on}} submerged | length = {{convert|171|ft|0|in|m|abbr=on}} | beam = {{convert|15|ft|4|in|m|abbr=on}} | draught = | propulsion =*1 × {{convert|480|hp|0|abbr=on}} [[diesel engine]] *2 × {{convert|620|hp|0|abbr=on}} [[electric motor]]s | speed =*{{convert|11.5|kn|lk=in}} surfaced *{{convert|9|kn}} submerged | range =*{{convert|2985|nmi|km|abbr=on}} at {{convert|7.5|kn|abbr=on}} surfaced *{{convert|130|nmi|km|abbr=on}} at {{convert|2|kn|abbr=on}} submerged | endurance = | test_depth = | complement = 22 | sensors = | EW = | armament = *4 × {{convert|21|in|mm|0|abbr=on}} bow [[torpedo tube]]s *8 × [[British 21-inch torpedo|21-inch torpedoes]]

| notes = }} }} '''HMS ''H47''''' was a British [[British H-class submarine|H-class]] [[submarine]] built by [[William Beardmore and Company]], [[Dalmuir]]. She was laid down on 20 November 1917 and was commissioned on 25 February 1919. The submarine had a complement of twenty-two crew members. HMS ''H47'' was sunk in a collision with the [[British L-class submarine]] {{HMS|L12||2}} off [[Milford Haven]], [[Wales]], on 9 July 1929. Twenty one of the crew were lost with only three survivors.

==Design== Like all post-''H20'' [[British H-class submarine]]s, ''H47'' had a displacement of {{convert|423|LT|t}} at the surface and {{convert|510|LT|t}} while submerged.<ref name="batcru">{{cite book |last1=Gardiner |first1=Robert |last2=Gray |first2=Robert |title=Conway's All the World's Fighting Ships 1906-1921 |date=1985 |publisher=Conway Maritime Press |location=London |isbn=0-85177-245-5 |page=92}}</ref> It had a total length of {{convert|171|ft|m}},<ref name="Walters2004">{{cite book|author=Derek Walters|title=The History of the British 'U' Class Submarine|url=https://books.google.com/books?id=VyeJ9DOXcOAC&pg=PA2|year=2004|publisher=Casemate Publishers|isbn=978-1-84415-131-8|pages=2–}}</ref> a beam of {{convert|15|ft|4|in}}, and a draught of {{convert|12|m}}.<ref name="Colledge"/> It contained a diesel engines providing a total power of {{convert|480|hp}} and two electric motors each providing {{convert|320|hp}} power.<ref name="Colledge">{{Colledge: Ships RN|year=2006}} Retrieved from [http://www.naval-history.net/WW1NavyBritishShips-Dittmar3WarshipsA.htm#10 Naval-History] on 20 August 2015.</ref> The use of its electric motors made the submarine travel at {{convert|11|kn|km/h mph}}. It would normally carry {{convert|16.4|LT|t}} of fuel and had a maximum capacity of {{convert|18|LT|t}}.<ref>{{cite web|url=http://www.gwpda.org/naval/hpatsubs.htm|title=Building History and Technical Details for Canadian CC-Boats and the Original H-CLASS|publisher=Electric Boat Company Holland Patent Submarines|author=J. D. Perkins|year=1999|access-date=20 August 2015}}</ref>

The submarine had a maximum surface speed of {{convert|13|kn|km/h mph}} and a submerged speed of {{convert|10.5|kn|km/h mph}}. Post-''H20'' British H-class submarines had ranges of {{convert|2985|nmi|km mi}} at speeds of {{convert|7.5|kn|km/h mph}} when surfaced.<ref name="batcru"/><ref name="Colledge"/> ''H47'' was fitted with an [[Anti-aircraft warfare|anti-aircraft gun]] and four {{convert|21|in|adj=on|0}} [[torpedo tube]]s. Its torpedo tubes were fitted to the [[Bow (watercraft)|bow]] and the submarine was loaded with eight {{cvt|21|in|0}} torpedoes.<ref name="batcru"/> It is a [[Holland 602 type submarine]] but was designed to meet Royal Navy specifications. Its [[Ship's company|complement]] was twenty-two crew members.<ref name="batcru"/>

==References== {{reflist}}

==Bibliography== * {{cite book |last1=Hutchinson |first1=Robert |title=Jane's submarines : war beneath the waves from 1776 to the present day |date=2001 |publisher=HarperCollins |location=London |isbn=978-0007105588}}

{{DEFAULTSORT:H47}} [[Category:British H-class submarines]] [[Category:Ships built on the River Clyde]] [[Category:1918 ships]] [[Category:Royal Navy ship names]] [[Category:Maritime incidents in 1929]] [[Category:Shipwrecks in the Irish Sea]] [[Category:Submarines sunk in collisions]]