HMS Trump (P333)
Encyclopedia
HMS Trump (pennant number
Pennant number
In the modern Royal Navy, and other navies of Europe and the Commonwealth, ships are identified by pennant numbers...

 P333) was a British
United Kingdom
The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 submarine
Submarine
A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...

 of the third group of the T class
British T class submarine
The Royal Navy's T class of diesel-electric submarines was designed in the 1930s to replace the O, P and R classes. Fifty-three members of the class were built just before and during the Second World War, where they played a major role in the Royal Navy's submarine operations...

. She was built by Vickers Armstrong
Vickers Armstrong
Vickers-Armstrongs Limited was a British engineering conglomerate formed by the merger of the assets of Vickers Limited and Sir W G Armstrong Whitworth & Company in 1927...

, Barrow
Barrow-in-Furness
Barrow-in-Furness is an industrial town and seaport which forms about half the territory of the wider Borough of Barrow-in-Furness in the county of Cumbria, England. It lies north of Liverpool, northwest of Manchester and southwest from the county town of Carlisle...

, and launched on 25 March 1944. So far she has been the only ship of the Royal Navy
Royal Navy
The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

 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 350 feet (106.7 m), an increase of 50 feet (15.2 m). 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
Amphion class submarine
|-See also:- External links :**...

. Because of expected use in tropical climates, boats of group three were equipped with freon blower
Gas compressor
A gas compressor is a mechanical device that increases the pressure of a gas by reducing its volume.Compressors are similar to pumps: both increase the pressure on a fluid and both can transport the fluid through a pipe. As gases are compressible, the compressor also reduces the volume of a gas...

s in order to deal with the increased temperatures.

World War II

Trump was commissioned in July 1944. After trials and a work-up in the North Sea
North Sea
In the southwest, beyond the Straits of Dover, the North Sea becomes the English Channel connecting to the Atlantic Ocean. In the east, it connects to the Baltic Sea via the Skagerrak and Kattegat, narrow straits that separate Denmark from Norway and Sweden respectively...

 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
HMS Adamant (1940)
HMS Adamant was a World War II submarine depot ship.Completed in 1942, she served in the Eastern Fleet with the 4th Submarine Flotilla from April 1943 until April 1945 and then moved with her flotilla to Fremantle, Australia...

. 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
HMS Tiptoe (P332)
HMS Tiptoe was a British submarine of the third group of the T class. She was built by Vickers Armstrong, Barrow, and launched on 25 February 1944. She was one of two submarines named by Winston Churchill, and so far has been the only ship of the Royal Navy to be named Tiptoe...

, she sank an 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 20 ft (6.1 m) 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
HMS Tabard (P342)
HMS Tabard was a British submarine of the third group of the T class. She was built by Scotts, Greenock, and launched on 21 November 1945. So far she has been the only boat of the Royal Navy to bear the name Tabard, after the item of clothing...

, 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
Sydney
Sydney is the most populous city in Australia and the state capital of New South Wales. Sydney is located on Australia's south-east coast of the Tasman Sea. As of June 2010, the greater metropolitan area had an approximate population of 4.6 million people...

, Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

. 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
Hauraki Gulf
The Hauraki Gulf is a coastal feature of the North Island of New Zealand. It has a total area of 4000 km², and lies between the Auckland Region, the Hauraki Plains, the Coromandel Peninsula and Great Barrier Island...

 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
Royal Australian Navy
The Royal Australian Navy is the naval branch of the Australian Defence Force. Following the Federation of Australia in 1901, the ships and resources of the separate colonial navies were integrated into a national force: the Commonwealth Naval Forces...

 service while boats of the Oberon class
Oberon class submarine
The Oberon class was a 27-boat class of British-built diesel-electric submarines based on the successful British Porpoise-class submarine....

were under construction. Trump was scrapped at Newport from 1 August 1971.
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