HMS Thetis (N25) was a Group 1 T-class submarine of the Royal Navy which sank during sea trials in Liverpool Bay, England on 1 June 1939. After being salvaged and repaired, the boat was recommissioned as HMS Thunderbolt in 1940. It served during the Second World War until being lost with all hands in the Mediterranean on 14 March 1943.
HMS Tapir (P335) was a Second World War British T-class submarine, built by Vickers-Armstrong in Barrow-in-Furness. So far she has been the only ship of the Royal Navy to bear the name Tapir, after the animal.
HMS P32 was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness.
HMS P48 was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness. Commissioned on 18 June 1942, Vickers arranged for the wife of serving submarine Captain, Alister Mars of HMS Unbroken, Ting Mars and Commander of the cruiser Jamaica to officially launch P.48 at Barrow dockyard.
HMS Tribune was a British T class submarine built by Scotts, Greenock. She was laid down on 3 March 1937 and was commissioned on 17 October 1939. HMS Tribune was part of the first group of T class submarines.
The second HMS Talisman (N78), and the first to enter service under the name, was a T-class submarine of the Royal Navy. She was laid down by Cammell Laird & Co Limited, Birkenhead and launched on 29 January 1940.
HMS Thorn (N11) was a T-class submarine of the Royal Navy. She was laid down by Cammell Laird & Co Limited, Birkenhead and launched in March 1941.
HMS Traveller (N48) was a T-class submarine of the Royal Navy. She was laid down by Scotts, Greenock and launched in August 1941.
HMS Trooper (N91) was a T-class submarine of the Royal Navy. She was laid down by Scotts, Greenock, and launched in March 1942. On October 6, 2024, it was reported that HMS Trooper was discovered at a depth of 253 metres (830 ft) in the Icarian Sea in Greece.
HMS Taurus was a Second World War T-class submarine, built by Vickers Armstrong, Barrow.
HMS Unbeaten was a U-class submarine, of the second group of that class, built by Vickers Armstrong, Barrow-in-Furness. She was laid down on 22 November 1939 and was commissioned on 10 November 1940. So far she has been the only ship of the Royal Navy to bear the name Unbeaten.
HMS Unique was a U-class submarine of the Royal Navy, of the second group of that class, built by Vickers Armstrong, Barrow-in-Furness. She was laid down on 30 October 1939 and was commissioned on 27 September 1940.
HMS Utmost was a British U class submarine, of the second group of that class, built by Vickers Armstrong, Barrow-in-Furness. She was laid down on 2 November 1939 and was commissioned on 17 August 1940. So far she has been the only ship of the Royal Navy to bear the name Utmost.
HMS P36 was a British U class submarine, a member of the third group of that class to be built. She was sunk at the quayside in Malta in 1942, and some of her survivors were shipwrecked again in another submarine less than six weeks later.
HMS United (P44) was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness. So far she has been the only ship of the Royal Navy to bear the name United.
HMS Unruffled was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness. So far she has been the only ship of the Royal Navy to bear the name Unruffled.
HMS P38 was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness.
HMS P39 was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness.
HMS Versatile (D32) was an Admiralty V-class destroyer of the British Royal Navy that saw service in World War I, the Russian Civil War, and World War II.
HMS Viscount was a V-class destroyer of the British Royal Navy that saw service in the final months of World War I and in World War II.
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