In the Royal Navy and other navies of Europe and the Commonwealth of Nations, ships are identified by pennant number. Historically, naval ships flew a flag that identified a flotilla or type of vessel. For example, the Royal Navy used a red burgee for torpedo boats and a pennant with an H for torpedo boat destroyers. Adding a number to the type-identifying flag uniquely identified each ship.
The Aggressive-class minesweepers are a class of US-built minesweepers. They are designated as MSO, distinguishing them from the smaller coastal MSCs and inshore MSIs. Besides the US Navy, this class of vessels has also been used by the Belgian Navy and the Norwegian Navy, among others.
The Ton class were coastal minesweepers built in the 1950s for the Royal Navy, but also used by other navies such as the South African Navy and the Royal Australian Navy. They were intended to meet the threat of seabed mines laid in shallow coastal waters, rivers, ports and harbours, a task for which the existing ocean-going minesweepers of the Algerine-class were not suited.
The Ley class was a class of inshore minehunter built for the Royal Navy in the mid-1950s. They had pennant numbers in the series M2001. Eleven ships were built in the early 1950s, most of which were subsequently disarmed and used as training vessels, RNXS tenders, URNU vessels etc.
HMS Bassingham was one of 93 ships of the Ham class of inshore minesweepers, of which HMS Inglesham was the first. Their names were all chosen from villages ending in -ham. The minesweeper was named after Bassingham in Lincolnshire. She was built by Vospers Ltd. of Portsmouth, which later became Vosper-Thorneycroft and was commissioned in October 1953. She displaced 164 tons fully laden and was armed with one 40 mm Bofors gun.
HMS Altham was one of 93 ships of the Ham class of inshore minesweepers.
HMS Asheldham was one of 93 ships of the Ham class of inshore minesweepers.
HMS Bodenham was one of 93 ships of the Ham-class of inshore minesweepers. Completed in 1953 for use in the British Royal Navy, she served as a tender to HMS Vernon between 1954 and 1955 before being placed in reserve. In 1967 she was transferred to the newly-independent country of South Yemen renamed Al Saqr. She was renamed Jihla in 1975 and discarded in 1984.
HMS Dittisham was one of 93 ships of the Ham-class of inshore minesweepers built for the British Royal Navy. Their names were all chosen from villages ending in -ham. The minesweeper was named after Dittisham in Devon.
HMS Greetham was one of 93 ships of the Ham class of inshore minesweepers. All ships in this class had names chosen from villages ending in -ham. The minesweeper was built by the firm of Herd & McKenzie in Buckie, Moray and was named after Greetham, Lincolnshire. Entering service in 1955, the vessel was transferred to the Libyan Navy in 1962 on loan and permanently in 1966. Renamed Zuara, the minesweeper was used as a patrol vessel until 1973. Zuara was sold to Captain Morgan Cruises of Malta for commercial use and renamed Lady Davinia. The ship was taken out of service in 2007 and laid up at Sliema Creek. Lady Davinia sank at her moorings in 2008 and for a short time became a diving attraction but in 2011 the wreck was partially broken up after being named a navigational hazard.
HMS Inglesham was the first of the 93 ships of the Ham-class of inshore minesweepers.
HMS Mersham was a Ham-class minesweeper of the Royal Navy. All ships of the class were named after villages ending in -ham. The minesweeper was named after Mersham in Kent. Constructed at Appledore, in Devon, Mersham was launched in April 1954 and completed in January 1955. In April 1955, the ship was transferred to the French Navy and in French service, was known by its pennant number, M773, until it was renamed Violette in 1964. Throughout the 1950s and early 1960s, the vessel undertook minesweeping duties from Brest in Brittany, before being laid up in 1965. In 1974, the ship was transferred to the Gendarmerie and undertook patrol duties until finally being decommissioned in 1987.
HMS Puttenham(M2784) was a Ham-class inshore minesweeper of the Royal Navy. She was launched in 1956 and entered service in 1958. The 93 ships of the Ham class had names chosen from villages ending in -ham. The minesweeper was named after Puttenham.
The Echo class was a class of inshore survey vessels built for the British Royal Navy in 1958–1959. The class was designed to operate in close waters such as harbour approaches, shipping lanes, rivers and estuaries. Together, the ships of this class formed the Royal Navy's Inshore Survey Squadron.
HMS Berkeley was a Hunt-class mine countermeasures vessel of the British Royal Navy. She was sold to the Hellenic Navy in 2001 and was commissioned as HS Kallisto. On 27 October 2020, she was cut in two in a collision with a container ship.
The Type 082 class minesweeper is a Chinese People's Liberation Army Navy (PLAN) ship class. It is also known as Wosao class in the west, but the Chinese media has translated the name as Wusao, short for armed mine sweeping boat. As with most mine countermeasure vessels in PLAN, all Type 082 ships are also equipped with mine laying rails and thus are also deployed as minelayers.
The Kuha-class minesweepers is a series of six inshore minesweepers of the Finnish Navy. The ships were constructed in 1974–1975. All the vessels of the class were modified and modernized in the late 1990s, including a lengthening of the hull. Two of the class were withdrawn from service in 2012. The rest of the class will be retired with the entry into service of the Katanpää-class mine countermeasure vessels.
Commissioned minesweepers and danlayers of the Royal New Zealand Navy (RNZN) from its formation on 1 October 1941 to the present. The RNZN was created two years into World War II. For coherence this article covers the war years from the start, and thus includes also the New Zealand minesweepers operating from the beginning of the war.
