USS Grampus (SS-207) was the eighth Tambor-class submarine to be commissioned in the United States Navy in the years leading up to the country's December 1941 entry into World War II. She was the sixth ship of the United States Navy to be named for Grampus griseus, also known as Risso's dolphin, a member of the dolphin family Delphinidae. Her World War II service was in the Pacific Ocean. She completed five war patrols in the following 14 months, and is credited with sinking over 45,000 tons of Japanese merchant shipping and warships. She was declared lost with all hands in March 1943; of the twelve Tambor-class submarines, only five survived the war. She received three battle stars for her World War II service.
HMS Upholder (P37) was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness. She was laid down on 30 October 1939, launched on 8 July 1940 by Mrs. Doris Thompson, wife of a director of the builders. The submarine was commissioned on 31 October 1940. She was one of four U-class submarines which had two external torpedo tubes at the bows in addition to the 4 internal ones fitted to all boats. They were excluded from the others because they interfered with depth-keeping at periscope depth.
HMS Safari was a third batch S-class submarine built for the Royal Navy during World War II. Commissioned in 1942, she was assigned to operate in the Mediterranean Sea. During the course of the war, Safari sank twenty-five ships, most of which were Italian.
HMS Taku was a British T class submarine built by Cammell Laird, Birkenhead. She was laid down on 18 November 1937 and was commissioned on 3 October 1940.
HMS Splendid was a third-batch S-class submarine built for the Royal Navy during World War II. She was laid down on 7 March 1941 and launched on 19 January 1942. After an initial patrol through the Bay of Biscay to Gibraltar, Splendid conducted two patrols in the Mediterranean Sea; one was abandoned after technical problems and on the other she sank two Italian ships. On her next patrol, the submarine attacked two Italian convoys, sinking an Italian destroyer in the second attack. Based in Algiers, the boat operated north of Sicily, sinking six Italian ships, including two tankers and two heavy merchant ships. Splendid was detected by a German destroyer on 21 April 1943 while patrolling off Naples, Italy; the submarine was attacked with depth charges by the destroyer and forced to surface, after which she was scuttled and her surviving crew members taken prisoner. She was the most successful British submarine by tonnage sunk between November 1942 and May 1943.
HMS Porpoise (N14) was one of the six-ship class of Grampus-class mine-laying submarines of the Royal Navy. She was built at Vickers Armstrong, Barrow and launched 30 August 1932. She served in World War II in most of the naval theatres of the war, in home waters, the Mediterranean and the Far East. She was sunk with all hands by Japanese aircraft on 19 January 1945, and was the last Royal Navy submarine to be lost to enemy action.
HMS Cachalot (N83) was one of the six-ship class of Grampus-class mine-laying submarine of the Royal Navy. She was built at Scotts, Greenock and launched 2 December 1937. She served in World War II in home waters and the Mediterranean. She was rammed and sunk by the Italian torpedo boat Generale Achille Papa on 30 July 1941.
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.
HMS Torbay (N79) was a T-class submarine of the Royal Navy. She was laid down at Chatham Dockyard and launched on 9 April 1940.
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 Turbulent (N98) was a T-class submarine of the Royal Navy. It was laid down by Vickers Armstrong, Barrow and launched in May 1941.
HMS Urge 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 30 October 1939, and was commissioned on 12 December 1940. From 1941 to 1942 she formed part of the 10th Submarine Flotilla based in Malta and spent most of her career operating in the Mediterranean, where she damaged and sank enemy warships and merchant vessels and undertook both SBS and SIS special operations. She was commanded by Lieutenant-Commander Edward Philip Tomkinson, DSO, RN. She was lost with all hands and a number of naval passengers on 27 April 1942 after striking a German mine off Malta.
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 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.
Vice-Admiral Sir Arthur Richard Hezlet, nicknamed Baldy Hezlet, was a decorated Royal Navy submariner. He became the Royal Navy's youngest captain at the time – aged 36 – and its youngest admiral, aged 45. In retirement he became a military historian.
HMS Regent was a Rainbow-class submarine designed and built by Vickers Shipbuilding and Engineering in Barrow-in-Furness for the Royal Navy, and was launched on 11 June 1930. She was lost with all hands after striking a mine on 18 April 1943.
German submarine U-568 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She conducted five patrols, sinking one merchant ship, two warships, and severely damaging another warship. On 28 May 1942, she was depth charged and sunk in the Mediterranean Sea; all hands survived.
Captain Michael Lindsay Coulton "Tubby" Crawford DSC & Bar was an officer in the Royal Navy and submariner.
World War II was the first war where naval aviation took a major part in the hostilities. Aircraft carriers were used from the start of the war in Europe looking for German merchant raiders and escorting convoys. Offensive operations began with the Norwegian campaign where British carriers supported the fighting on land.
Pegaso was a torpedo boat and an escort aviso of the Italian Regia Marina. She was one of the most successful Axis anti-submarine warships of World War II.
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