|Succeeded by:||Leander-class frigate|
2,170 tons standard|
2,400 tons full load
|Length:||340 ft (100 m) o/a|
|Beam:||40 ft (12 m)|
|Draught:||15 ft 6 in (4.72 m)|
|Propulsion:||8 × ASR1 diesels, 12,400 shp, 2 shafts|
|Speed:||24 kn (44 km/h)|
|Range:||7,500 nmi (13,900 km) at 16 kn (30 km/h)|
|Sensors and |
Type 960 air search radar, later Type 965 AKE-2|
Type 293Q target indication radar, later Type 993n
Type 982 aircraft direction radar, later Type 986
Type 277Q height finding radar, later Type 278
Type 974 navigation radar, later Type 978
Type 285 fire control radar on director Mark 6M
Type 262 fire control on STAAG mount
Type 1010 Cossor Mark 10 IFF
Type 174 search sonar
Type 170 attack sonar
1 × twin 4.5 in gun Mark 6|
1 × twin 40 mm Bofors gun STAAG Mark 2, later;
1 × twin 40 mm Bofors gun Mk.5; Llandaff & Chichester
1 × Sea Cat GWS-20 SAM; Lincoln & Salisbury
1 × Squid A/S mortar
They were related to the Type 41 Leopard class frigates, but with reduced armament to make way for more aircraft direction equipment. Unlike the Battle class AD conversions, the primary role of the Type 61 was not operations with fast carrier groups for which their diesel powered cruising engines, increasingly lacked the speed. The role of the Type 61 was as a seaworthy air ocean surveillance ship and air control ship supporting Suez ( for which they were too late) type amphibious operations and air strikes.
The equipment fitted to the Type 61s was essentially that of second line aircraft carriers and ambhibious helicopter carriers. While the frontline carriers (eg Eagle, Hermes and Victorious) carried the 3D bulky 984 radar and the ability to analyse and prioritise 24 to 100 air targets, the second line carriers (Ark Royal, Centaur, Bulwark, Albion) and the Type 61 AD frigates carried initially 960 (rapidly updated to 965) radar for AW and 982 radar for a degree of 3D cover and better air control over land.
By the late 1960s the decision to phase out the carriers and other factors were making the 984 unsustainable. Hermes and Victorious were too small to carry secondary surveillance or backup radar; 984 was becoming more difficult to maintain and not reliable, and Victorious and Hermes essentially had a capacity for only 25 second generation fighter and bombers and ASW helicopters, which was of limited value.
Therefore a new radar, 985, superior as a radar to 984 and 965 was developed to use the 982 antenna and fitted in the late 1960s to what would be the last conventional carriers, Ark Royal and Bulwark, and the Type 61 escorts.
However the 985 system did not have the analysis and prioritising capabilities of the 984 system and the Type 61s lacked the computer processing capability to properly process the data or really effectively operate with the Ark.
|Pennant||Name||Builder||Ordered||Laid Down||Launched||Accepted into service||Commissioned||Estimated building cost||Fate|
|F32||Salisbury||(a) HM Dockyard, Devonport
(b) Vickers Armstrong (Engineers) Ltd, Barrow-in-Furness 
|21 August 1951 ||23 January 1952 ||25 June 1953 ||27 February 1957 ||27 February 1957 ||£2,900,000 ||Sale to Egypt cancelled 1978 whilst on delivery trip. May 1980 harbour training ship Devonport. Sunk as target 30 September 1985.|
|F59||Chichester||(a) The Fairfield Shipbuilding and Engineering Co Ltd, Govan, Glasgow
(b) British Polar Engines Ltd, Glasgow 
|28 June 1951 ||26 June 1953 ||21 June 1955 ||May 1958 ||16 May 1958 ||£3,291,000 ||Converted to harbour guardship Hong Kong 1973; sold for breaking up 17 March 1981.|
|F61||Llandaff||(a) R & W Hawthorn Leslie and Co Ltd, Newcastle-on-Tyne
(b) British Polar Engines Ltd, Glasgow 
|28 June 1951 ||27 August 1953 ||30 November 1955 ||April 1958 ||11 April 1958 ||£3,393,000 ||To Bangladesh 10 December 1978 as Umar Farooq. Wrongly claimed sold for breaking up in April 1983. Not scrapped, still in active service.|
|F99||Lincoln||(a) The Fairfield Shipbuilding and Engineering Co Ltd, Govan, Glasgow
(b) Cammell Laird and Co (Shipbuilders and Engineers) Ltd, Birkenhead 
|28 June 1951 ||1 June 1955 ||6 April 1959 ||July 1960 ||7 July 1960 ||£3,685,000 ||Sale to Egypt in 1978 cancelled. August 1979 recommissioned briefly as submarine target. Intended to be sold to Bangladesh in 1982, though this transfer did not take place. Broken up 1983.|
Three further ships of the class were planned. Two of these were cancelled under the 1957 Defence Review, and the third (Coventry) was suspended. It was hoped to order Coventry in 1961, but in the event it was decided to order a Leander class frigate that became HMS Penelope.
- The term used in Navy Estimates and Defence Estimates is "accepted into service". Hansard has used the term acceptance date. Leo Marriott in his various books uses the term "completed", as does Jane's Fighting Ships. These terms all mean the same thing: the date the Navy accepts the vessel from the builder. This date is important because maintenance cycles, etc. are generally calculated from the acceptance date.
- "Unit cost, i.e. excluding cost of certain items (e.g. aircraft, First Outfits)."
Text from Defences Estimates
- Navy Estimates, 1957-58, pages 234-5, List and particulars of new ships which have been accepted or are expected to be accepted into HM service during the Financial Year ended 31 March 1957
- Moore, George, The dawn of the Salisbury, Leopard and Whitby class frigates in Warship, 2004, pub Conways, 2004, ISBN 0-85177-948-4 page 134.
- Gardiner, Robert Conway's All the World's Fighting Ships 1947-1995, pub Conway Maritime Press, 1995, ISBN 0-85177-605-1 page 517.
Note that this page of Conway's appears to contains errors concerning the fate of ships. Where either pages 23 of Conway's or Norman Friedman's book contradict page 517 of Conway's, about the fate of vessels of the Salisbury class, then page 517 has been assumed to be less reliable.
- Friedman, Norman British Destroyers and Frigates, the Second World War and After, pub Seaforth, 2006, ISBN 978-1-84832-015-4 page 338.
- Navy Estimates, 1959-60, pages 230-1, List and particulars of new ships which have been accepted or are expected to be accepted into HM service during the Financial Year ended 31 March 1959
- Gardiner, Robert Conway's All the World's Fighting Ships 1947-1995, pub Conway Maritime Press, 1995, ISBN 0-85177-605-1 page 23.
- Deccan Chronicle, Bangladesh Navy ship docks in city, 19 December 2010
- Navy Estimates, 1961-62, pages 220-51, List and particulars of new ships which have been accepted or are expected to be accepted into HM service during the Financial Year ended 31 March 1961
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