pennant number
In the Royal Navy and other navies of Europe and the Commonwealth of Nations, ships are identified by pennant number (an internationalisation of ''pendant number'', which it was called before 1948). Historically, naval ships flew a flag that iden ...
P333) was a British
submarine
A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.) The term "submarine" is also sometimes used historically or infor ...
of the third group of the T class. She was built by
Vickers-Armstrongs
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. The majority of the company was nationalised in the 1960s and 1970s, w ...
, Barrow, and launched on 25 March 1944. So far she has been the only ship of the
Royal Navy
The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King of the United Kingdom, King. Although warships were used by Kingdom ...
(RN) to bear the name ''Trump''. She spent the majority of her life attached to the 4th Submarine Squadron 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
Ship breaking (also known as ship recycling, ship demolition, ship scrapping, ship dismantling, or ship cracking) is a type of ship disposal involving the breaking up of ships either as a source of Interchangeable parts, parts, which can be sol ...
for scrap in August 1971.
Design and description
HMS ''Trump'' was one of the group three of T-class submarines.Akermann (2002): p. 386 She was part of the second batch of the third group to be ordered, in 1941.McCarthy (2006): p. 12 She was one of a number of boats which had an all-welded hull which increased diving depth to , an increase of .McCarthy (2006): p. 13 The
torpedo
A modern torpedo is an underwater ranged weapon launched above or below the water surface, self-propelled towards a target, with an explosive warhead designed to detonate either on contact with or in proximity to the target. Historically, such ...
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 tube
A torpedo tube is a cylindrical device for launching torpedoes.
There are two main types of torpedo tube: underwater tubes fitted to submarines and some surface ships, and deck-mounted units (also referred to as torpedo launchers) installed aboa ...
s had major problems and affected the streamlining of the boats; the external tubes were abandoned in the following . Due to 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
The North Sea lies between Great Britain, Denmark, Norway, Germany, the Netherlands, Belgium, and France. A sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian Se ...
in mid-October she was sent to
Perth
Perth () is the list of Australian capital cities, capital city of Western Australia. It is the list of cities in Australia by population, fourth-most-populous city in Australia, with a population of over 2.3 million within Greater Perth . The ...
in
Western Australia
Western Australia (WA) is the westernmost state of Australia. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Aust ...
depot ship
A depot ship is an auxiliary ship used as a mobile or fixed base for submarines, destroyers, minesweepers, fast attack craft, landing craft, or other small ships with similarly limited space for maintenance equipment and crew dining, berthing an ...
. From Perth, ''Trump'' carried out four patrols before the end of the war.
During her Far East service, ''Trump'' sank the Japanese guard boat ''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 boat , she sank a Japanese cargo vessel on 9 August.
Also with ''Tiptoe'', ''Trump'' carried out an attack on a
convoy
A convoy is a group of vehicles, typically motor vehicles or ships, traveling together for mutual support and protection. Often, a convoy is organized with armed defensive support and can help maintain cohesion within a unit. It may also be used ...
on 3 August. Although 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.Akermann (2002): p. 383 This "Slippery T" or "Super T" conversion involved the removal of the
deck gun
A deck gun is a type of naval artillery mounted on the deck of a submarine. Most submarine deck guns were open, with or without a shield; however, a few larger submarines placed these guns in a turret.
The main deck gun was a dual-purpose w ...
and the replacement of the
conning tower
A conning tower is a raised platform on a ship or submarine, often armoured, from which an officer in charge can conn (nautical), conn (conduct or control) the vessel, controlling movements of the ship by giving orders to those responsible for t ...
with a streamlined "
fin
A fin is a thin component or appendage attached to a larger body or structure. Fins typically function as foils that produce lift or thrust, or provide the ability to steer or stabilize motion while traveling in water, air, or other fluids. F ...
". Extra batteries were installed below the control room and additional electric motors were accommodated by cutting through the
pressure hull
A submarine hull has two major components, the ''superstructure'' and the ''pressure hull''. The external portion of a submarine’s hull—that part that does not resist sea pressure and is free-flooding—is known as the “superstructure” i ...
and adding in a new hull section inserted aft of the control room. The
diesel engine
The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which Combustion, ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to Mechanics, mechanical Compr ...
s were modified and supercharged with output increased by . The gun armaments and external torpedo tubes were removed, and the bow reshaped. ''Trump'' was one of two submarines, the other being , which had the
bridge
A bridge is a structure built to Span (engineering), span a physical obstacle (such as a body of water, valley, road, or railway) without blocking the path underneath. It is constructed for the purpose of providing passage over the obstacle, whi ...
incorporated into the added fin section; and was the last to undergo this conversion.
In 1960, ''Trump'', along with and ''Tabard'', rejoined the 4th Submarine Flotilla at
Sydney
Sydney is the capital city of the States and territories of Australia, state of New South Wales and the List of cities in Australia by population, most populous city in Australia. Located on Australia's east coast, the metropolis surrounds Syd ...
, Australia. There, they operated with units of the Far East Fleet, the Royal Australian Navy, and the
Royal New Zealand Navy
The Royal New Zealand Navy (RNZN; ) is the maritime arm of the New Zealand Defence Force. The fleet currently consists of eight ships. The Navy had its origins in the Naval Defence Act 1913, and the subsequent acquisition of the cruiser , whi ...
. In June 1964, she participated in the "NEWS EX"
anti-submarine
An anti-submarine weapon (ASW) is any one of a number of devices that are intended to act against a submarine and its crew, to destroy (sink) the vessel or reduce its capability as a weapon of war. In its simplest sense, an anti-submarine weapon ...
exercise
Exercise or workout is physical activity that enhances or maintains fitness and overall health. It is performed for various reasons, including weight loss or maintenance, to aid growth and improve strength, develop muscles and the cardio ...
in the
Hauraki Gulf
The Hauraki Gulf / Tīkapa Moana is a coastal feature of the North Island of New Zealand. It has an area of 4000 km2,Cockatoo Island (New South Wales)#Cockatoo Island Dockyard, 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 assigned to the
Royal Australian Navy
The Royal Australian Navy (RAN) is the navy, naval branch of the Australian Defence Force (ADF). The professional head of the RAN is Chief of Navy (Australia), Chief of Navy (CN) Vice admiral (Australia), Vice Admiral Mark Hammond (admiral), Ma ...
while boats of the were under construction, but remained a Royal Navy submarine. ''Trump'' was scrapped at Newport from 1 August 1971.