- Career Home waters Mediterranean
- Sinking
- Notes
- References
- External links
{{other ships|HMS Tetrarch}}{{Use dmy dates|date=March 2017}}{{Use British English|date=March 2017}}{{Infobox ship image| Ship image=HMS Tetrarch.jpg | Ship caption=HMS Tetrarch
}}{{Infobox ship career | Hide header= | Ship country=United Kingdom | United Kingdom|naval}} | Ship name=HMS Tetrarch | Ship namesake= | Ship owner= | Ship operator= | Ship registry= | Ship route= | Ship ordered= | Ship awarded= | Ship builder=Vickers Armstrong, Barrow | Ship original cost= | Ship yard number= | Ship way number= | Ship laid down=24 August 1938 | Ship launched=14 November 1939 | Ship sponsor= | Ship christened= | Ship completed= | Ship acquired= | Ship commissioned=15 February 1940 | Ship recommissioned= | Ship decommissioned= | Ship maiden voyage= | Ship in service= | Ship out of service= | Ship renamed= | Ship reclassified= | Ship refit= | Ship struck= | Ship reinstated= | Ship homeport= | Ship identification= | Ship motto= | Ship nickname= | Ship honours= | Ship honors= | Ship captured= | Ship fate=sunk 2 November 1941 | Ship status= | Ship notes= | Ship badge=
}}{{Infobox ship characteristics | Hide header= | Header caption= | Ship class=British T class submarine | Ship type= | Ship tonnage= | Ship displacement=*1,090 tons surfaced | Ship tons burthen= | 275|ft|m|abbr=on}} | 26|ft|6|in|m|abbr=on}} | Ship height= | 16.3|ft|m|abbr=on}} | Ship draft= | Ship depth= | Ship hold depth= | Ship decks= | Ship deck clearance= | Ship ramps= | Ship ice class= | Ship power= | Ship propulsion=*Two shafts- Twin diesel engines 2,500 hp (1.86 MW) each
- Twin electric motors 1,450 hp (1.08 MW) each
| Ship sail plan= | Ship speed=*15.25 knots (28.7 km/h) surfaced- 9 knots (20 km/h) submerged
| Ship range=4,500 nautical miles at 11 knots (8,330 km at 20 km/h) surfaced | Ship endurance= | 300|ft|m|abbr=on}} max | Ship boats= | Ship capacity= | Ship troops= | Ship complement=59 | Ship crew= | Ship time to activate= | Ship sensors= | Ship EW= | Ship armament=- 6 internal forward-facing {{convert|21|in|mm|adj=on|0}} torpedo tubes
- 4 external forward-facing torpedo tubes
- 6 reload torpedoes
- 1 x {{convert|4|inch|mm|adj=on|0}} deck gun
| Ship armour= | Ship armor= | Ship aircraft= | Ship aircraft facilities= | Ship notes=
}} | HMS Tetrarch (N77) was a T-class submarine of the Royal Navy. She was laid down by Vickers Armstrong, Barrow and launched in November 1939. CareerIn common with many of her class, Tetrarch saw extensive service in the key naval theatres, Home waters, serving in the North Sea and off the French and Scandinavian coasts, and the Mediterranean. Home watersTetrarch{{'}}s first success came in May 1940 when she torpedoed and sank the German submarine chaser UJ B / Treff V in the Skagerrak. She also sank the Danish fishing vessel Terieven and the German tanker Samland, and captured the Danish fishing vessel Emmanuel, which was taken to Leith as a prize. MediterraneanTetrarch was assigned to operate in the Mediterranean in late 1940. She sank the Italian merchants Snia Amba, Giovinezza and Citta di Bastia, the Italian tanker Persiano, the Italian sailing vessels V 72/Fratelli Garre, V 113/Francesco Garre and Nicita, and the Greek sailing vessel Panagiotis Kramottos. She also damaged the German merchant Yalova and claimed to have damaged a sailing vessel in the Aegean. Tetrarch also carried out an unsuccessful attack on the Greek tanker Olympos.[1]SinkingTetrach sailed from Malta on 26 October 1941 for a refit in Britain, via Gibraltar. She failed to arrive in Gibraltar on 2 November and was declared overdue. Her route passed through a known minefield. On Monday 27 she communicated with P34, which was in the same area. This was the last contact with the submarine. She is presumed lost to Italian mines off Capo Granditola, Sicily, Italy in late October 1941.[2]Notes1. ^HMS Tetrarch, Uboat.net
2. ^Submarine losses 1904 to present day, RN Submarine Museum, Gosport
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 book|last=Bagnasco |first=Erminio |title=Submarines of World War Two |year=1977 |publisher=Naval Institute Press |location=Annapolis, Maryland |isbn=0-87021-962-6}}
- {{Colledge}}
- {{cite book|title=Conway's All the World's Fighting Ships 1922–1946|editor1-last=Chesneau|editor1-first=Roger|publisher=Conway Maritime Press|location=Greenwich, UK|year=1980|isbn=0-85177-146-7}}
- {{cite book|last=Kemp|first=Paul J.|title=The T-class Submarine: The Classic British Design|publisher=Naval Institute Press|location=Annapolis, Maryland|year=1990|isbn=1-55750-826-7}}
- {{cite book|last=McCartney|first=Innes|location=Oxford, UK|title=British Submarines 1939–1945|series=New Vanguard|volume=129|year=2006|publisher=Osprey|isbn=1-84603-007-2}}
External links- Interview with Ronald Mills, who commanded HMS Tetrarch from 1940 to 1941
{{T class submarine}}{{October 1941 shipwrecks}}{{coord missing|Mediterranean}}{{DEFAULTSORT:Tetrarch (N77)}} 9 : British T-class submarines of the Royal Navy|Ships built in Barrow-in-Furness|1939 ships|World War II submarines of the United Kingdom|Lost submarines of the United Kingdom|World War II shipwrecks in the Mediterranean|Maritime incidents in October 1941|Ships lost with all hands|Ships sunk by mines |