|Laid down:||7 May 1940|
|Launched:||5 March 1942|
|Commissioned:||29 August 1942|
|Fate:||sunk 17 October 1943|
|Class and type:||British T class submarine|
|Length:||275 ft (84 m)|
|Beam:||26 ft 6 in (8.08 m)|
|Draught:||16.3 ft (5.0 m)|
|Range:||4,500 nautical miles at 11 knots (8,330 km at 20 km/h) surfaced|
|Test depth:||300 ft (91 m) max|
Trooper spent most of her short career serving in the Mediterranean. She sank the Italian tanker Rosario, the Italian merchant ship Forli, a sailing vessel and the Italian submarine Pietro Micca. She also damaged two other enemy vessels, and unsuccessfully attacked the Italian merchant Belluno (the former French Fort de France).
Trooper sailed from Beirut on 26 September 1943, on her 8th War Patrol to cover in the Aegean Sea off the Dodecanese islands. On 14 October she challenged Levant Schooner Flotilla F8 off Alinda Bay, Leros. She failed to return on 17 October and was reported overdue on that day. She is presumed lost on German mines around Leros.
- HMS Trooper, Uboat.net
- Submarine losses 1904 to present day, RN Submarine Museum, Gosport
- Colledge, J. J.; Warlow, Ben (2006) . Ships of the Royal Navy: The Complete Record of all Fighting Ships of the Royal Navy (Rev. ed.). London: Chatham Publishing. ISBN 978-1-86176-281-8. OCLC 67375475.
- Grant, David Renwick (2006). A Submarine at War: The Brief Life of HMS Trooper. Periscope Publishing.
- Hutchinson, Robert (2001). Jane's Submarines: War Beneath the Waves from 1776 to the Present Day. London: HarperCollins. ISBN 978-0-00-710558-8. OCLC 53783010.
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