HMS Dalrymple (K427)
Encyclopedia
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HMS Dalrymple (K427/A302) was a Bay-class
Bay class frigate
The Bay class was a class of 26 anti-aircraft frigates built for the Royal Navy under the 1943 War Emergency Programme during World War II...

 anti-aircraft
Anti-aircraft warfare
NATO defines air defence as "all measures designed to nullify or reduce the effectiveness of hostile air action." They include ground and air based weapon systems, associated sensor systems, command and control arrangements and passive measures. It may be to protect naval, ground and air forces...

 frigate
Frigate
A frigate is any of several types of warship, the term having been used for ships of various sizes and roles over the last few centuries.In the 17th century, the term was used for any warship built for speed and maneuverability, the description often used being "frigate-built"...

 of the 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...

 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...

, which served as a survey ship, mostly in the Persian Gulf
Persian Gulf
The Persian Gulf, in Southwest Asia, is an extension of the Indian Ocean located between Iran and the Arabian Peninsula.The Persian Gulf was the focus of the 1980–1988 Iran-Iraq War, in which each side attacked the other's oil tankers...

, from 1948 until 1965. She was completed to deal with the large numbers of uncharted wrecks
Shipwreck
A shipwreck is what remains of a ship that has wrecked, either sunk or beached. Whatever the cause, a sunken ship or a wrecked ship is a physical example of the event: this explains why the two concepts are often overlapping in English....

 and mines around the British Isles
British Isles
The British Isles are a group of islands off the northwest coast of continental Europe that include the islands of Great Britain and Ireland and over six thousand smaller isles. There are two sovereign states located on the islands: the United Kingdom of Great Britain and Northern Ireland and...

 as a result of World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

. For this purpose she was fitted for minesweeping
Minesweeper (ship)
A minesweeper is a small naval warship designed to counter the threat posed by naval mines. Minesweepers generally detect then neutralize mines in advance of other naval operations.-History:...

. She was named for the pioneering Hydrographer of the Admiralty
United Kingdom Hydrographic Office
The United Kingdom Hydrographic Office is an organisation within the UK government responsible for providing navigational and other hydrographic information for national, civil and defence requirements...

 Alexander Dalrymple
Alexander Dalrymple
Alexander Dalrymple was a Scottish geographer and the first Hydrographer of the British Admiralty. He was the main proponent of the theory that there existed a vast undiscovered continent in the South Pacific, Terra Australis Incognita...

 (1737-1808).

Construction

The ship was originally ordered from William Pickersgill & Sons Ltd.
A&P Group
A&P Group Ltd is the largest ship repair and conversion company in the UK, with three shipyards located in Hebburn, Middlesbrough and Falmouth. The Company undertakes a wide variety of maintenance and repair work on commercial and military ships with projects ranging from a two day alongside repair...

 of South Bank, Middlesbrough
South Bank, Middlesbrough
South Bank is a small town which forms part of the Middlesbrough urban area that lies 2.3 miles from Middlesbrough centre, in North East England. As the name suggests, it lies on the south bank of the River Tees. Although it is part of the Middlesbrough conurbation, it is a ward of Redcar and...

, on 25 January 1943 as the Loch Glass. However the contract was changed in 1944, and the ship was laid down as Admiralty Job Number 4795 on 29 April 1944 to a revised design as a Bay-class anti-aircraft frigate, and launched on 12 April 1945 as Luce Bay. After launching the contract was terminated and the ship was towed to Devonport Dockyard
HMNB Devonport
Her Majesty's Naval Base Devonport , is one of three operating bases in the United Kingdom for the Royal Navy . HMNB Devonport is located in Devonport, in the west of the city of Plymouth in Devon, England...

 for completion, but while fitting out it was decided to complete her as a survey ship. In January 1947 her name was changed to Dalrymple and her pennant number
Pennant number
In the modern Royal Navy, and other navies of Europe and the Commonwealth, ships are identified by pennant numbers...

 to A302. She was completed on 10 February 1948.

Service history

Dalrymple was commissioned for service on 10 February 1948 and after sea trial
Sea trial
A sea trial is the testing phase of a watercraft . It is also referred to as a "shakedown cruise" by many naval personnel. It is usually the last phase of construction and takes place on open water, and can last from a few hours to many days.Sea trials are conducted to measure a vessel’s...

s, sailed for the Mediterranean. She spent much of her career in the Persian Gulf
Persian Gulf
The Persian Gulf, in Southwest Asia, is an extension of the Indian Ocean located between Iran and the Arabian Peninsula.The Persian Gulf was the focus of the 1980–1988 Iran-Iraq War, in which each side attacked the other's oil tankers...

, often with , as well as carrying our extensive surveys of the Grand Harbour
Grand Harbour
Grand Harbour is a natural harbour on the island of Malta. It has been used as a harbour since at least Phoenician times...

 at Valletta
Valletta
Valletta is the capital of Malta, colloquially known as Il-Belt in Maltese. It is located in the central-eastern portion of the island of Malta, and the historical city has a population of 6,098. The name "Valletta" is traditionally reserved for the historic walled citadel that serves as Malta's...

, the Malta Channel
Malta Channel
Malta Channel separates the European island of Malta from the southern tip of Sicily. The channel serves as a sea route link to Europe for the Maltese....

 and the Strait of Sicily
Strait of Sicily
The Strait of Sicily is the strait between Sicily and Tunisia. It is about wide and divides the Tyrrhenian Sea and the western Mediterranean Sea from the eastern Mediterranean. Its maximum depth is ....

. She also spent some time in the Indian Ocean
Indian Ocean
The Indian Ocean is the third largest of the world's oceanic divisions, covering approximately 20% of the water on the Earth's surface. It is bounded on the north by the Indian Subcontinent and Arabian Peninsula ; on the west by eastern Africa; on the east by Indochina, the Sunda Islands, and...

, mostly working around Zanzibar
Zanzibar
Zanzibar ,Persian: زنگبار, from suffix bār: "coast" and Zangi: "bruin" ; is a semi-autonomous part of Tanzania, in East Africa. It comprises the Zanzibar Archipelago in the Indian Ocean, off the coast of the mainland, and consists of numerous small islands and two large ones: Unguja , and Pemba...

. During "Operation Musketeer
Operation Musketeer (1956)
Operation Musketeer was the Anglo-French-Israeli plan for the invasion of Egypt to capture the Suez Canal during the Suez Crisis. Israel had the additional objective to open the Straits of Tiran.-The operation:...

" (the Suez invasion
Suez Crisis
The Suez Crisis, also referred to as the Tripartite Aggression, Suez War was an offensive war fought by France, the United Kingdom, and Israel against Egypt beginning on 29 October 1956. Less than a day after Israel invaded Egypt, Britain and France issued a joint ultimatum to Egypt and Israel,...

) in late 1956, she was deployed at Port Said
Port Said
Port Said is a city that lies in north east Egypt extending about 30 km along the coast of the Mediterranean Sea, north of the Suez Canal, with an approximate population of 603,787...

, clearing obstructions from the Suez Canal
Suez Canal
The Suez Canal , also known by the nickname "The Highway to India", is an artificial sea-level waterway in Egypt, connecting the Mediterranean Sea and the Red Sea. Opened in November 1869 after 10 years of construction work, it allows water transportation between Europe and Asia without navigation...

.

In 1957 Dalrymple operated off the West Coast of Scotland, carrying out trials of a new radio-location system, before being extensively refitted, with improved radar, working spaces, messing and crew accommodation. Dalrymple then returned to the Persian Gulf for further surveys. She also operated off Cyprus
Cyprus
Cyprus , officially the Republic of Cyprus , is a Eurasian island country, member of the European Union, in the Eastern Mediterranean, east of Greece, south of Turkey, west of Syria and north of Egypt. It is the third largest island in the Mediterranean Sea.The earliest known human activity on the...

 in 1962, and served as Guard ship
Guard ship
A guard ship is a warship stationed at some port or harbour to act as a guard, and in former times in the Royal Navy to receive the men impressed for service...

 at Gan
Addu Atoll
Addu City is a city in Maldives consisting of the inhabited islands of the southernmost atoll of the archipelago....

 in the Maldives
Maldives
The Maldives , , officially Republic of Maldives , also referred to as the Maldive Islands, is an island nation in the Indian Ocean formed by a double chain of twenty-six atolls oriented north-south off India's Lakshadweep islands, between Minicoy Island and...

 in early 1963. She then returned to the UK, remaining in home waters and surveying the North-West Approaches, particularly around Rockall
Rockall
Rockall is an extremely small, uninhabited, remote rocky islet in the North Atlantic Ocean. It gives its name to one of the sea areas named in the shipping forecast provided by the British Meteorological Office....

 and the coast of Northern Ireland
Northern Ireland
Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...

. The ship sailed into Plymouth on 28 November 1965 for her final return after 17 years surveying service. She was put into Reserve on 2 February 1966 and placed on Disposal List.

Dalrymple was sold to Portugal in March 1966, who had already bought four other frigates of the same class , and renamed NRP Afonso de Albuquerque. She continued to be used as a survey ship, operating on the Portuguese coast and around the Azores
Azores
The Archipelago of the Azores is composed of nine volcanic islands situated in the middle of the North Atlantic Ocean, and is located about west from Lisbon and about east from the east coast of North America. The islands, and their economic exclusion zone, form the Autonomous Region of the...

 and the Madeira Islands
Madeira
Madeira is a Portuguese archipelago that lies between and , just under 400 km north of Tenerife, Canary Islands, in the north Atlantic Ocean and an outermost region of the European Union...

. Decommissioned on 14 January 1983, the ship was used as an accommodation ship at Lisbon
Lisbon
Lisbon is the capital city and largest city of Portugal with a population of 545,245 within its administrative limits on a land area of . The urban area of Lisbon extends beyond the administrative city limits with a population of 3 million on an area of , making it the 9th most populous urban...

Dockyard up until 1988. Her subsequent fate is unknown.
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