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 (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely op ...
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 United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against F ...
(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 dismantling, or ship cracking) is a type of ship disposal involving the breaking up of ships for either a source of Interchangeable parts, parts, which can be sold for re-use, ...
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, and with an explosive warhead designed to detonate either on contact with or in proximity to the target. Historically, su ...
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.
trials
In law, a trial is a coming together of parties to a dispute, to present information (in the form of evidence) in a tribunal, a formal setting with the authority to adjudicate claims or disputes. One form of tribunal is a court. The tribunal, w ...
and a work-up in the
North Sea
The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian S ...
in mid-October she was sent to
Perth
Perth is the capital and largest city of the Australian state of Western Australia. It is the fourth most populous city in Australia and Oceania, with a population of 2.1 million (80% of the state) living in Greater Perth in 2020. Perth is ...
in
Western Australia
Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...
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 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 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 ...
and the replacement of the
conning tower
A conning tower is a raised platform on a ship or submarine, often armored, from which an officer in charge can conn the vessel, controlling movements of the ship by giving orders to those responsible for the ship's engine, rudder, lines, and gro ...
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. Fin ...
". 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 ''light hull'' and the ''pressure hull''. The light hull (''casing'' in British usage) of a submarine is the outer non-watertight hull which provides a hydrodynamically efficient shape. The pressure ...
and adding in a new hull section inserted aft of the control room. The
diesel engine
The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-call ...
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 a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually somethi ...
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 state of New South Wales, and the most populous city in both Australia and Oceania. Located on Australia's east coast, the metropolis surrounds Sydney Harbour and extends about towards the Blue Mountain ...
, 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; mi, Te Taua Moana o Aotearoa, , Sea Warriors of New Zealand) is the maritime arm of the New Zealand Defence Force. The fleet currently consists of nine ships. The Navy had its origins in the Naval Defence Act ...
. 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 weapo ...
exercise
Exercise is a body activity that enhances or maintains physical fitness and overall health and wellness.
It is performed for various reasons, to aid growth and improve strength, develop muscles and the cardiovascular system, hone athletic ...
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 principal naval force of the Australian Defence Force (ADF). The professional head of the RAN is Chief of Navy (CN) Vice Admiral Mark Hammond AM, RAN. CN is also jointly responsible to the Minister of ...
while boats of the were under construction, but remained a Royal Navy submarine. ''Trump'' was scrapped at Newport from 1 August 1971.