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TON Class Association
Coastal Minesweeper Terrier of the Seas
CMS Facts and Figures
152 ft Long, 28 ft Beam, Draught 8 ft
Displacement 425 tons
Two engines
15 Knots
Range 2300 miles at 13 knots
4-5 Officers, 3 Senior Rates, 20+ Ratings
Mine Sweeper & Mine Hunter versions
Double-diagonal mahogany hulls, on aluminium frame
Teak/Oroko decks
Aluminium upperworks
Twin screws, twin rudders
Mirrlees 2500 hp or Deltic 3000 hp engines
1 x 40mm Bofors cannon
1 x twin 20 mm Oerlikon cannon *
Wire, Magnetic & Acoustic sweeps
• Design conceived in 1949 to counter improved enemy magnetic and acoustic mines
• Originally to be called after Insects, then re-named after English villages ending in “…ton”
•117 ships built for Royal Navy – largest class
• Used by six other navies
• Design principles carried forward to current MCMVs
• Designed for coastal waters but served in every ocean except Arctic and Antarctic
– Canada & Argentina came close
•Saw action at Suez (twice), Cyprus, Borneo, Persian Gulf, Northern Ireland
•Used for Mine Sweeping, Mine Hunting,
Fishery Protection, Gun Boats, Piracy Patrols,
Counter-terrorist gun-running, Training, RNR
German Minelayer
with buoyant mines1938
Royal Navy laying
buoyant mines 1940’s
German Magnetic Mine 1940
BANG !
Oropesa Sweep
Sweepdeck – Tin Gear
Launch Otter
Oropesa Starboard
Acoustic Sweeping
LL Magnetic Sweep
Otter
Float electrodes
4 inch Buoyant Cable 3000 amps
Magnetic Sweeping
Influence SweepingAcoustic
Magnetic
HMS Fenton - M1135
Built by Camper & Nicholson - 5th of 8 vessels
Launched 10 March 1955
Commissioned for 108 MSS August 1955
10 x Cyprus anti-terrorist & gun running patrols
January 1956 – October 1958
Operation Musketeer Suez Canal November 1956
October 1958 – Running Reserve – Malta
October 1959 Towed to Aden – Strategic Reserve
(not arked until November 1961)
December 1964 Returned to UK under own power
May 1965 Refit suspended
July 1968 Sold for breakup
FENTON as Half Leader 108 MSS
CMS s arked in Reserve Fleet
Fishery Protection
CUXTON & Polish Factory Ship on limit of Territorial Waters
MFVs under arrest
Gemini Salvage
Refuelling at Sea
Pirate Hunting
Training – ship handling
WOODBRIDGE HAVEN & Inshore Flotilla
104 [Blackfoot] Squadron
Deltic Engine
Hearts & Minds Patrols
Mine Warfare in Iraq 2004