Occam or Ockham may refer to:
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 Abbotsham was one of 93 ships of the Ham class of inshore minesweepers.
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 Bedham was one of 93 ships of the Ham class of inshore minesweepers.
HMS Chillingham was one of 93 ships of the Ham-class of inshore minesweepers.
HMS Everingham was one of 93 ships of the Ham-class of inshore minesweepers.
HMS Felmersham was one of 93 ships of the Ham class of inshore minesweepers.
HMS Flintham was one of 93 ships of the Ham-class of inshore minesweepers.
HMS Fordham was one of 93 ships of the Ham-class of inshore minesweepers.
HMS Haversham was one of 93 ships of the Ham-class of inshore minesweepers.
HMS Hildersham was one of 93 ships of the Ham class of inshore minesweepers.
HMS Ledsham was one of 93 ships of the Ham class of inshore minesweepers.
HMS Littleham was one of 93 ships of the Ham class of inshore minesweepers.
HMS Ludham was one of 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 Ottringham was one of 93 ships of the Ham class of inshore minesweepers.
HMS Petersham was a Ham-class minesweeper of the Royal Navy.
HMS Thakeham was one of 93 ships of the Ham-class of inshore minesweepers.
United Kingdom
