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 following ships of the Royal Navy were assigned the name Calypso, after Calypso, a sea nymph in Greek mythology:
The Ham class was a class of inshore minesweepers (IMS), known as the Type 1, of the British Royal Navy. The class was designed to operate in the shallow water of rivers and estuaries. All of the ships in the class are named for British place names that end with -"ham". The parent firm that was responsible for supervising construction was Samuel White of Cowes, Isle of Wight.
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 Brigham was one of 93 ships of the Ham-class of inshore minesweepers.
HMS Damerham was one of 93 ships of the Ham-class of inshore minesweepers. Their names were all chosen from villages ending in -ham. The minesweeper was named after Damerham in Hampshire.
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 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 Ottringham was one of 93 ships of the Ham class of inshore minesweepers.
HMS Polsham was one of 93 ships of the Ham-class of inshore minesweepers.
HMS Powderham was one of 93 ships of the Ham class of inshore minesweepers named after villages ending in -ham, in this case Powderham in Devon. She was launched on 27 November 1958 by J. Samuel White & Company Ltd, Cowes and commissioned in 1959. She was allocated pennant number M 2720.
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.
HMS Saxlingham was one of 93 ships of the Ham-class of inshore minesweepers.
HMS Sidlesham was one of 93 ships of the Ham-class of inshore minesweepers. Their names were all chosen from villages ending in "-ham". This minesweeper was named after Sidlesham in West Sussex.
HMS Tongham was one of 93 ships in the Ham-class of inshore minesweepers. Their names were all chosen from villages ending in -ham; in this case, Tongham in Surrey. She was built in Scotland by James N Miller & Sons at St Monance, Fife, with a fully-wooden hull. Launched on 30 November 1955, she was delivered on 18 June 1967, and commissioned with pennant number M2735.
Several Royal Navy ships have been named HMS Woodlark or the woodlark:
HMS President is a "stone frigate", or shore establishment of the Royal Naval Reserve, based on the northern bank of the River Thames near Tower Bridge in Wapping and is in the London Borough of Tower Hamlets.
Deptford Dockyard was an important naval dockyard and base at Deptford on the River Thames, operated by the Royal Navy from the sixteenth to the nineteenth centuries. It built and maintained warships for 350 years, and many significant events and ships have been associated with it.
United Kingdom
