HMS D8 was a British D class submarine

British D class submarine

There were plans for a further two, D9 and D10, but these were launched at Chatham Dockyard as HMS E1 and HMS E2.-See also:*Not to be confused with the United States D class submarine of 1909-1910.-Sources:...

 built by Chatham Dockyard

Chatham Dockyard

Chatham Dockyard, located on the River Medway and of which two-thirds is in Gillingham and one third in Chatham, Kent, England, came into existence at the time when, following the Reformation, relations with the Catholic countries of Europe had worsened, leading to a requirement for additional...

. D8 was laid down on 14 February 1910, launched 23 September 1911 and was commissioned on 23 March 1912.

D8 fought in the Battle of Heligoland Bight on 28 August 1914 along with sister ships HMS D2

HMS D2

HMS D2 was a British D class submarine built by Vickers, Barrow. D2 was laid down on 10 July 1909 and was commissioned on 29 March 1911....

 and HMS D3

HMS D3

HMS D3 was a British D class submarine built by Vickers, Barrow. D3 was laid down on 15 March 1910 and was commissioned on 30 August 1911.During her career, D3 returned from the second Heligoland Bight patrol along with D2, E5 and E7....

. Then on 18 October 1914, D8 shadowed German hospital ship Ophelia

German hospital ship Ophelia

German hospital ship Ophelia was a steam ship originally built by a German shipping company, but requisitioned for use as an Imperial German Navy hospital ship during the First World War...

 which was judged to be spying and was interned.

D8 was sold on 19 December 1921 to H. Pounds

H. G. Pound

H.G. Pound is the name of the founder of a British merchant firm in Portsmouth, UK. The firm, founded in 1864, diversified into shipbreaking after World War I and has accumulated over the years vast quantities of military equipment awaiting scrapping...

.