| 词条 | HMS Dittisham (M2621) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 释义 |
HMS Dittisham was one of 93 ships of the {{sclass2-|Ham|minesweeper|0}} 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. Design and descriptionIn the early 1950s, the Royal Navy had a requirement for large numbers of minesweepers to counter the threat to British shipping from Soviet mines in the event of a conventional Third World War. The navy's existing minesweepers were obsolete, while the increasing sophistication of modern mines meant the mine warfare forces could not be supplemented by requisitioned fishing vessels as had been done in previous wars. Large orders were placed for coastal minesweepers (the {{sclass2-|Ton|minesweeper|5}}) and for smaller inshore minesweepers and minehunters intended to operate in inshore waters such as river estuaries (the {{sclass2-|Ham|minesweeper|5}} and {{sclass2-|Ley|minehunter|5}} classes). As the navy did not have sufficient manpower to operate all the required ships in peacetime, it was planned to lay a large number up in reserve, so they could be manned by reservists (in may cases the crews of the fishing boats which would previously have been used in the same role) in time of emergency.[1][2][3] Dittisham was one of the first series of Ham-class ships, with a composite (wooden planking on aluminium framing) hull,[4] and was {{convert|106|ft|9|in|m}} long overall and {{convert|100|ft|0|in|m}} between perpendiculars, with a beam of {{convert|21|ft|2|in|m}} and a draught of {{convert|5|ft|6|in|m}}. Displacement was {{convert|120|LT|t}} standard and {{convert|159|LT|t}} full load.[5] Two Paxman 12-cylinder diesel engines gave a total of {{convert|1100|bhp|kW}} and drove two shafts, giving a top speed of {{convert|14|kn|mph km/h}}, which corresponded to a speed when sweeping of {{convert|9|kn|mph km/h}}.[4][5] The design armament for the class was a single Bofors 40 mm gun, although this was generally replaced by an Oerlikon 20 mm cannon.[4]ServiceDittisham was built by Fairlie Yacht and was launched on 23 October 1953 and completed on 29 June 1954.[6][7] She was placed in reserve in 1955, being laid up at Hythe, Hampshire and Gosport.[8] In 1968 she became a training tender to HMS Ganges, the Royal Navy's boys' training establishment at RNTE Shotley, where she was used to teach seamanship to the school's students.[9] In 1973 she transferred to HMS Raleigh at Torpoint in 1973.[8] In March 1983, she was sold to the Kingston Sea Cadets and became TS Steadfast. In April 1997, she was towed to Pounds Shipyard at Portsmouth and broken up. References1. ^{{Harvnb|Gardiner|Chumbley|1995|pp=480, 541}} 2. ^{{Harvnb|Brown|Moore|2012|pp=130–132}} 3. ^{{Harvnb|Friedman|1987|pp=45–46}} 4. ^1 2 {{Harvnb|Gardiner|Chumbley|1995|p=541}} 5. ^1 {{Harvnb|Blackman|1962|p=283}} 6. ^{{Harvnb|Colledge|Warlow|2006|p=115}} 7. ^{{Harvnb|Worth|1986|p=123}} 8. ^1 {{Harvnb|Worth|1986|p=129}} 9. ^{{cite news|title=Full Ahead - Throttles Jammed in Vernon Basin|newspaper=Navy News|date=January 1969|page=5|url=https://issuu.com/navynews/docs/196901|accessdate=20 November 2018}}
{{Ham Class IMS}}{{DEFAULTSORT:Dittisham}}{{UK-minesweeper-stub}} 3 : Ham-class minesweepers|Royal Navy ship names|1953 ships |
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