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On This Day - December 31

1912 Nautilus (N 1) Launched
1934 Shark (N 54) Completed
1939 Undine (N 48) HMS Undine departed Blyth for her 4th war patrol. She was ordered to patrol in the Heligoland Bight.
1940 Sea Dog (P 216) Laid Down
1940 Sibyl (P 217) Laid Down
1942 P311 (Tutankhamen) HMS P311, only unnamed T-class boat, was due to have been named Tutenkhamen. Fitted to carry human torpedoes (Chariots). Lost while engaged in Operation Principal, a chariot attack on Italian cruisers at La Maddalena.

Left Scotland in November 1942 with sister-boats Thunderbolt and Trooper after addition of human torpedo deck-mounted watertight containers direct for Malta. From there, sailed with Chariots for Operation Principle. Last signal on 31st December. Probably sunk by Italian mines in the approaches to Maddalena. Lost with all hands
1942 Unrivalled (P 45) HMS Unrivalled torpedoes and sinks the Italian merchant Maddalena south-east of Mehedia, Tunisia.
1942 Truculent (P 315) Completed
1942 Trump (P 333) Laid Down
1942 Ultor (P 53) Completed
1944 Shakespeare (P 221) HMS Shakespeare torpedoes and sinks the Japanese merchant cargo ship Unryu Maru east of Port Blair, Andaman Islands.
1944 Trenchant (P 331) HMS Trenchant sinks two Japanese sailing vessels with gunfire in the Malacca Strait.
1959 Sealion (S 07) Launched
1974 HMCS Rainbow HMCS Rainbow paid off Esquimalt BC. Last Canadian Pacific Fleet submarine until 2003

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Acheron (P 411)

Class: 1943 - 1977: Amphion Class
Built By: Chatham Dockyard (Medway)
Build Group: Amphion
Fate:
Scrapped in 1972 at the yard of J Cashmore of Newport
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