View source for HMS D1

{{short description|Submarine of the Royal Navy}}

{{Use dmy dates|date=August 2017}}
{{Use British English|date=August 2017}}
{|{{Infobox ship begin}}
{{Infobox ship image
|Ship image=HMS D1 (WWI).jpg
|Ship caption=HMS ''D1''
}}
{{Infobox ship career
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|Ship country=United Kingdom
|Ship flag={{shipboxflag|United Kingdom|naval}}
|Ship class=
|Ship name=HMS ''D1''
|Ship ordered= 
|Ship awarded=
|Ship builder=[[Vickers-Armstrongs|Vickers Armstrong]], [[Barrow-in-Furness]]
|Ship laid down= 14 May 1907
|Ship launched= 16 May 1908
|Ship christened=
|Ship acquired=
|Ship commissioned= September 1909
|Ship recommissioned=
|Ship decommissioned=
|Ship in service=
|Ship out of service=
|Ship renamed=
|Ship reclassified=
|Ship refit=
|Ship struck=
|Ship reinstated=
|Ship fate=Sunk (as a target) on 23 October 1918
|Ship homeport=
}}
{{Infobox ship characteristics
|Hide header=
|Header caption=
|Ship class=[[British D-class submarine|D-class submarine]]
|Ship displacement=Surfaced= 483 tons / Submerged= 595 tons
|Ship length={{convert|163.0|ft|m|abbr=on}} (oa)
|Ship beam={{convert|13.6|ft|m|abbr=on}} (oa)
|Ship draught=
|Ship draft=
|Ship propulsion=550 [[horsepower|hp]] electric 1750 hp diesel twin screws
|Ship speed=Surfaced=14.0 [[knot (unit)|kn]] / Dived= 10.0 (design) 9.0 (service)
|Ship range=Surface= 2500 [[nautical mile|nmi]] at 10 kn / Submerged=45 nmi at 5 kn
|Ship test depth=
|Ship complement=25
|Ship armament= 3 × 18 in (45 cm) [[torpedo tube]]s (2 bow, 1 stern)
|Ship notes=
}}
|}
'''HMS ''D1''''' was one of eight [[British D-class submarine|D-class submarine]] built for the [[Royal Navy]] during the first decade of the 20th century.

==Description==
The D-class submarines were designed as improved and enlarged versions of the preceding [[British C-class submarine|C class]], with [[diesel engine]]s replacing the dangerous [[petrol engine]]s used earlier. The submarines had a length of {{convert|163|ft|m|1}} [[length overall|overall]], a [[beam (nautical)|beam]] of {{convert|20|ft|6|in|m|1}} and a mean [[draft (ship)|draught]] of {{convert|10|ft|5|in|m|1}}. They [[displacement (ship)|displaced]] {{convert|483|LT|t}} on the surface and {{convert|595|LT|t}} submerged.<ref>Harrison, Chapter 4</ref> The D-class submarines had a crew of 25 officers and [[Naval rating|ratings]] and were the first to adopt [[saddle tank (submarine)|saddle tanks]].<ref name=gg9>Gardiner & Gray, p. 87</ref>

For surface running, the boats were powered by two {{convert|600|bhp|lk=in|0|adj=on}} diesels, each driving one [[propeller shaft]]. When submerged each propeller was driven by a {{convert|275|hp|0|adj=on}} [[electric motor]]. They could reach {{convert|14|kn|lk=in}} on the surface and {{convert|9|kn}} underwater. On the surface, the D class had a range of {{convert|2500|nmi|lk=in}} at {{convert|10|kn}}.<ref name=gg9/>

The boats were armed with three [[British 18 inch torpedo|18-inch (45&nbsp;cm)]] [[torpedo tube]]s, two in the bow and one in the stern. They carried one reload for each tube, a total of six torpedoes.<ref name=gg9/>

==Construction and career==
''D1'' was [[laid down]] by [[Vickers]] on 14 May 1907 and was [[Ceremonial ship launching|launched]] on 16 May 1908 at [[Barrow-in-Furness|Barrow]]. She was [[Ship commissioning|commissione]]d in September 1909. In 1910, ''D1'' took part in the annual manoevures, during which she "torpedoed" two "Blue Fleet" [[cruiser]]s off [[Colonsay]]. This showed that the D class could operate a considerable distance from their base at [[Fort Blockhouse]].

''D1'' was sunk as a target on 23 October 1918 near [[Dartmouth, Devon|Dartmouth]].<ref>{{NHLE|num=1472317|desc=HMS/m D1|accessdate=1 May 2021}}</ref>

== Wreck discovery ==
The wreck was discovered by divers looking for the remains of German [[U-Boat]]s and has been afforded protected status.<ref>[https://www.bbc.co.uk/news/uk-england-devon-57091381 ''Dartmouth: WW1 submarine wreck given protection''] at bbc.co.uk. Retrieved 14 May 2021.</ref>

==Citations==
{{Reflist}}

==References==
* {{cite book|last=Akermann|first=Paul|title=Encyclopaedia of British Submarines 1901–1955|edition=reprint of the 1989|year=2002|publisher=Periscope Publishing|location=Penzance, Cornwall|isbn=1-904381-05-7}}
* {{Cite Colledge2006}}
* {{cite book |editor1-last=Gardiner|editor1-first=Robert|editor2-last=Gray|editor2-first=Randal|title=Conway's All the World's Fighting Ships 1906–1921|year=1985|location=Annapolis, Maryland|publisher=Naval Institute Press|isbn=0-85177-245-5|name-list-style=amp}}
* {{cite web|url=http://rnsubs.co.uk/dits-bits/br-3043.html|title=The Development of HM Submarines From Holland No. 1 (1901) to Porpoise (1930) (BR3043)|last=Harrison|first=A. N.|date=January 1979|publisher=RN Subs|access-date=27 September 2022}}

==External links==
* [http://www.maritimequest.com/warship_directory/great_britain/submarines/pages/d_class/d_1_page_1.htm MaritimeQuest HMS D-1 Pages]

{{British D class submarine}}
{{October 1918 shipwrecks}}

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{{DEFAULTSORT:D01}}
[[Category:British D-class submarines]]
[[Category:Royal Navy ship names]]
[[Category:1908 ships]]
[[Category:Ships built in Barrow-in-Furness]]
[[Category:Ships sunk as targets]]
[[Category:Maritime incidents in 1918]]
[[Category:Protected wrecks of England]]