HMS Thermopylae (P355) was a T-class submarine in service with the United Kingdom's Royal Navy. So far she has been the only ship of the Royal Navy to bear the name Thermopylae, after the Battle of Thermopylae.
The Parthian-class submarine or P class was a class of six submarines built for the Royal Navy in the late 1920s. They were designed as long-range patrol submarines for the Far East. These boats were almost identical to the Odin class, the only difference being a different bow shape.
HMS H44 was an H-class submarine of the Royal Navy. She was built by Armstrong Whitworth and launched on 17 February 1919. She served in the Second World War. She had a complement of twenty-two crew members. She was sold in 1944 and was broken up at Troon in February 1945.
The F-class submarine was built for the Royal Navy as a coastal submarine based on the doubled hulled V-class submarine with very few minor improvements. The only important improvement was the addition of a stern torpedo tube. The F class were ordered as a successor to the E-class submarine, but only three were built out of the ten ordered, the first F1 at Chatham.
HMS Tempest (N86) was a T-class submarine of the Royal Navy. She was laid down by Cammell Laird & Co Limited, Birkenhead and launched in June 1941, serving in the Mediterranean theatre until 13 February 1942, when she was sunk by the Regia Marina while on patrol the Gulf of Taranto.
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 Taciturn was a British submarine of the third group of the T class. built by Vickers Armstrong, Barrow and launched on 7 June 1944. So far she has been the only ship of the Royal Navy to bear the name Taciturn.
HNLMS Tijgerhaai (P336) was a Zwaardvisch-class submarine of the Royal Netherlands Navy during and after World War II. She was originally ordered as HMS Tarn (P326), a British T-class submarine, built by Vickers Armstrong, Barrow, but never saw service under that name. She would have been the only ship of the Royal Navy to bear the name Tarn.
HMS Taurus was a Second World War T-class submarine, built by Vickers Armstrong, Barrow.
HMS Truncheon was a group three T Class submarine of the Royal Navy which entered service in the last few months of World War II. So far she has been the only ship of the Royal Navy to be named Truncheon. She was sold to Israel in 1968 and commissioned into the Israeli Sea Corps as INS Dolphin.
HMS Varangian was a British built U class submarine, a member of the third group of that class to be built. The submarine carried out patrols in the Norwegian Sea and was also used in a training role. She was broken up at Gateshead in 1949. Her ship's bell is in the possession of the Royal Navy Submarine Museum in Gosport, United Kingdom.
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 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 Usurper (P56) was a Royal Navy U-class submarine built by Vickers-Armstrongs at High Walker. So far, she has been the only ship of the Royal Navy to bear the name Usurper.
HMS Uther (P62) 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 Uther after the father of King Arthur, Uther Pendragon.
HMS P39 was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness.
HMS H52 was a British H class submarine built by HM Dockyard, Pembroke Dock. She was laid down on an unknown date, launched on 31 March 1919 and commissioned on 16 December 1919, the last Welsh-built fighting ship to enter the British Royal Navy.
HMS H51 was a British H class submarine built by HM Dockyard, Pembroke Dock. She was laid down on an unknown date, launched on 15 November 1918 and commissioned into the British Royal Navy on 1 September 1919. It had a complement of twenty-two crew members.
The sixth HMS Hazard was a Dryad-class torpedo gunboat of the Royal Navy. She was launched in 1894 and was converted into the world's first submarine depot ship in 1901. She collided with the submarine A3 on 2 February 1912, killing 14 men, and was herself sunk in collision with SS Western Australia on 28 January 1918.
United Kingdom