HMS Rorqual (N74) was a British mine-laying submarine, one of the six ships of the Grampus class of the Royal Navy. She was built by Vickers Armstrong, Barrow and launched 27 July 1936. She served in the Second World War in the Mediterranean and in the far east. She was the only Grampus-class submarine to survive the war, and she is considered the most successful minelaying submarine of World War II, sinking 57,704 GRT of enemy shipping, 35,951 of which through her mines.
HMS Truant (N68) was a T-class submarine of the Royal Navy. She was laid down by Vickers Armstrong, Barrow and launched on 5 May 1939.
HMS Terrapin was a British submarine of the third group of the T class. She was built as P323 by Vickers Armstrong, Barrow and launched on 31 August 1943. So far she has been the only ship of the Royal Navy to bear the name Terrapin, after the animal of that name. Apart from a brief period in home waters off the Scandinavian coast, Terrapin served in the Far East for much of her wartime career.
HMS Ursula was a U-class submarine, of the first group of that class constructed for the Royal Navy. The submarine entered service in 1938 and saw action during the Second World War in the North and Mediterranean Seas.
HMS Ultimatum (P34) was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness, and part of the third group of that class. So far she has been the only ship of the Royal Navy to bear the name Ultimatum.
HMS Ultor (P53) was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness, launched in 1942, and part of the third group of the class. So far she has been the only ship of the Royal Navy to bear the name Ultor.
HMS Unbroken (P42) was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness; it was part of the third group of that class and has been the only vessel of the Royal Navy to bear the name. She entered service as P42 and was renamed Unbroken on 1 February 1943.
HMS Unison (P43) was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness, and part of the third group of that class. She is the only craft of the Royal Navy to have borne the name Unison. Prior to receiving the name, she carried the pennant number P43 and was unofficially known as Ulysses. She was renamed Unison in 1943.
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 Unrivalled (P45) was a U-class submarine built for the Royal Navy during World War II. The boat has been the only ship of the Royal Navy to ever bear the name Unrivalled. Completed in 1942, the boat spent most of the war in the Mediterranean. She sank a number of small merchant ships and naval auxiliaries, but major success eluded her during the war. Too small and slow for the post-war environment, Unrivalled was scrapped in 1946.
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 Unruly 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 Unruly.
HMS Unseen (P51) was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness.
HMS Unsparing (P55) was a Royal Navy U-class submarine built by Vickers-Armstrong. So far she has been the only ship of the Royal Navy to bear the name Unsparing.
HMS Unswerving (P63) was a Royal Navy U-class submarine built by Vickers-Armstrongs, High Walker. So far, she has been the only ship of the Royal Navy to bear the name Unswerving.
HMS Untiring (P59) was a Royal Navy U-class submarine built by Vickers-Armstrong. So far she has been the only ship of the Royal Navy to bear the name Untiring. After the war, she was loaned to the Greek Navy and renamed Xifias (Y-10).
HMS Uproar (P31) 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 Uproar. She was originally named P 31, renamed Ulleswater in February 1943 and finally renamed Uproar in April 1943.
HMS Upstart (P65) was a Royal Navy U-class submarine built by Vickers-Armstrong. So far she has been the only ship of the Royal Navy to bear the name Upstart. After the war, she was loaned to the Greek Navy and renamed Amfitriti.
HMS Virulent was a V-class submarine of the Royal Navy. She was built during the Second World War as part of the second batch of V-class submarines ordered on 21 May 1942.
HMS Vivid was a V-class submarine laid down in 1942 and launched in 1943 by Vickers Armstrong in Newcastle-upon-Tyne for the British Royal Navy. She was launched in September 1943 and, under the command of Lieutenant John Cromwell Varley DSC, served with the 10th Submarine Flotilla based at Malta during the closing stages of the Allied campaign in the Mediterranean sinking various German, Greek and Italian merchant ships off the coast of Greece.
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