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HMS Tetrarch (N77)

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HMS Tetrarch
History
United Kingdom
NameHMS Tetrarch
BuilderVickers Armstrong, Barrow
Laid down24 August 1938
Launched14 November 1939
Commissioned15 February 1940
IdentificationPennant number N77
FateSunk 2 November 1941
Badge
General characteristics
Class and typeBritish T class submarine
Displacement
  • 1,090 tons surfaced
  • 1,575 tons submerged
Length275 ft (84 m)
Beam26 ft 6 in (8.08 m)
Draught16.3 ft (5.0 m)
Propulsion
  • Two shafts
  • Twin diesel engines 2,500 hp (1.86 MW) each
  • Twin electric motors 1,450 hp (1.08 MW) each
Speed
  • 15.25 knots (28.7 km/h) surfaced
  • 9 knots (20 km/h) submerged
Range4,500 nautical miles at 11 knots (8,330 km at 20 km/h) surfaced
Test depth300 ft (91 m) max
Complement59
Armament

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.

Career

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In 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 waters

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Tetrarch'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.

Mediterranean

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Tetrarch 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]

Sinking

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Tetrach 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]

Norman Walton, who later became the sole survivor of the sinking of HMS Neptune had visited the ship prior to its sailing to celebrate the birthday of a member of the Tetrarch, and upon realising it had sailed, he leapt off the ship and swam back to shore. His name had been added to the ships roll as it left port, and after the ship vanished his parents were mistakenly notified he was missing in action.[3]

Notes

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  1. ^ HMS Tetrarch, Uboat.net
  2. ^ Submarine losses 1904 to present day Archived 8 August 2007 at the Wayback Machine, RN Submarine Museum, Gosport
  3. ^ "Norman Walton".

References

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