HMS Trump ( P333 ) HMS " Trump " ( pennant number P333 ) was a British submarine of the third group of the " T " class . She was built by Vickers Armstrong , Barrow , and launched on 25 March 1944 . So far she has been the only ship of the Royal Navy to bear the name " Trump " . She spent the majority of her life attached to the 4th Submarine division based in Australia . She was kept in service following the war and was refitted for greater underwater performance , and was the final RN submarine to be posted in Australia , departing in January 1969 . She was sold off and broken up for scrap in August 1971 . Design and description . HMS " Trump " was one of the group three of " T " class submarines . She was part of the second batch of the third group to be ordered , in 1941 . She was one of a number of boats which had an all - welded hull which increased diving depth to , an increase of . The torpedo armament was the same as the earlier group two , although by the time group three was coming into service it was realised that external torpedo tubes had major problems and affected the streamlining of the boats ; the external tubes were abandoned in the following Amphion class submarine . Because of expected use in tropical climates , boats of group three were equipped with freon blowers in order to deal with the increased temperatures . Service . World War II . " Trump " was commissioned in July 1944 . After trials and a work - up in the North Sea in mid - October she was sent to Perth in Western Australia . On arrival , she joined the 4th Submarine division , supported by the depot ship HMS " Adamant " . From Perth , " Trump " carried out four patrols before the end of the war . During her Far East service , " Trump " sank the Japanese guardboat " No . 15 Shosei Maru " on 13 May ; a Japanese sailing vessel on 24 May ; and two coasters , one on 29 May and the other on 1 June . She sank a tanker on 5 June and together with her sister HMS " Tiptoe " , she sank a Japanese cargo vessel on 9 August . Also with " Tiptoe " , " Trump " carried out an attack on a convoy on 3 August . Although the it was escorted by a Japanese patrol boat , they successfully sank " Tencho Maru " , an army cargo ship , with the sinking credited to " Tiptoe " . Post war . " Trump " survived the war and continued in service with the Royal Navy . " Trump " was one of several all - welded T - Class submarines rebuilt for greater underwater performance . This " Slippery T " or " Super T " conversion involved the removal of the deck gun and the replacement of the conning tower with a streamlined " fin " . Extra batteries were installed below the control room and additional electric motors were accommodated by cutting through the pressure hull and adding in a new hull section inserted aft of the control room . The diesel engines were modified and supercharged with output increased by 300 BHP . The gun armaments and external torpedo tubes were removed , and the bow reshaped . " Trump " was one of two submarines , the other being HMS " Tabard " , which had the bridge incorporated into the added fin section ; and was the last to undergo this conversion . In 1960 , " Trump " , along with " Taciturn " and " Tabard " , rejoined the 4th Submarine Flotilla at Sydney , Australia . There , they operated with units of the Far East Fleet , the Royal Australian Navy , and the Royal New Zealand Navy . In June 1964 , she participated in the " NEWS EX " anti - submarine exercise in the Hauraki Gulf off the coast of New Zealand . " Trump " underwent refits at Cockatoo Dockyard , between January 1962 and April 1963 , and again between August 1965 and October 1966 . She was the final Royal Navy submarine to be on station in Australia , departing on 10 January 1969 when the 1st Australian Submarine squadron was formed from the RN 4th Submarine Squadron . She was temporarily transferred to Royal Australian Navy service while boats of the Oberon class were under construction . " Trump " was scrapped at Newport from 1 August 1971 .