HMS D2

The D-class submarines were designed as improved and enlarged versions of the preceding C class, with diesel engines replacing the dangerous petrol engines used earlier. D2 was slightly smaller than her sister ships and had a length of {{convert|162|ft|1|in|m|1}} overall, a beam of {{convert|20|ft|6|in|m|1}} and a mean draught of {{convert|10|ft|10|in|m|1}}. She displaced {{convert|489|LT|t}} on the surface and {{convert|603|LT|t}} submerged.Harrison, Chapter 4 The D-class submarines had a crew of 25 officers and ratings and were the first to adopt saddle tanks.Gardiner & Gray, p. 87

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}}.

The boats were armed with three 18-inch (45 cm) torpedo tubes, two in the bow and one in the stern. They carried one reload for each tube, a total of six torpedoes.

D2 was laid down by Vickers on 10 July 1909 at their Barrow shipyard and commissioned on 29 March 1911. During her career, D2 returned from the second Heligoland Bight patrol along with {{HMS|D3||2}}, {{HMS|E5||2}} and {{HMS|E7||2}}. On 28 August 1914, D2, D3 and {{HMS|D8||2}} fought in the Battle of Heligoland Bight. Then, two days before D2 met her fate, Lieutenant Commander Jameson was washed overboard off Harwich. Lt. Cdr. Head was his replacement. D2 was rammed and sunk by a German patrol boat off Borkum on 25 November 1914, leaving no survivors.

{{stack|File:Chester Cathedral glass 039.jpg}}

The Coplestone Memorial Window in Chester Cathedral is in memory of "F. Lewis Coplestone, Lt-Commander, Royal Navy, HM Submarine D2" and Commander A.F. Coplesone-Boughey, RN, HMS Defence.{{Cite web|url=https://www.warmemorialsonline.org.uk/memorial/239055/|title=Copplestone Window - War Memorials Online}} It depicts St Anselm, Archbishop of Canterbury and shows at the bottom three coats of arms of the Coplestone family, which originated at the manor of Copleston in Devon.

{{Reflist|30em}}

• {{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}}
• {{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}}

• [http://www.maritimequest.com/warship_directory/great_britain/submarines/pages/d_class/d_2_page_1.htm MaritimeQuest HMS D-2 Pages]
• [http://www.maritimequest.com/warship_directory/great_britain/submarines/pages/d_class/d_2_roll_of_honour.htm HMS D-2 Roll of Honour]
• [http://www.submarine-museum.co.uk/what-we-have/memorial-chapel/submarine-losses?start=3 'Submarine losses 1904 to present day' - Royal Navy Submarine Museum] {{Webarchive|url=https://web.archive.org/web/20150925133842/http://www.submarine-museum.co.uk/what-we-have/memorial-chapel/submarine-losses?start=3 |date=25 September 2015 }}

{{British D class submarine}}

{{November 1914 shipwrecks}}

{{coord missing|North Sea}}

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Category:British D-class submarines

Category:Royal Navy ship names

Category:Ships built in Barrow-in-Furness

Category:World War I shipwrecks in the North Sea

Category:Lost submarines of the United Kingdom

Category:Maritime incidents in November 1914

Category:1910 ships

Category:Warships lost in combat with all hands