MMS-class minesweeper

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The Royal Navy during the Second World War A14421.jpg
105 ft Motor Minesweeper
Class overview
Operators:  Royal Navy,  Soviet Navy
Built: 1940–1945
General characteristics
Type: Minesweeper
Displacement: 240–250 long tons (244–254 t)
  • 105 ft (32 m) p/p
  • 119 ft (36 m) o/a
Beam: 23 ft (7.0 m)
Draught: 9 ft 6 in (2.90 m)
Propulsion: Diesel engine, 375–425 bhp (280–317 kW)
Speed: 12 knots (14 mph; 22 km/h)
Complement: 20
  • 2 × 20 mm AA guns
  • 2 × machine guns

The MMS class were a class of 402 coastal minesweepers built for the Royal Navy between 1940 and 1945. They were of wooden construction to counteract magnetic mines.

The coastal minesweepers had pennant numbers MMS1 to MMS312 and MMS1001 to MMS1090. They were nicknamed ‘Mickey Mouse’.

Although the Motor Minesweepers lacked the power to tow sweeps for contact mines they were suitable for handling equipment for combating magnetic mines and some later models were fitted with an acoustic hammer on a retractable "A" frame over the bows for countering acoustic mines.

The Motor Minesweepers had limited use post-war so they were quickly disposed of. Three were transferred by Lend-Lease to the Soviet Navy.


  • Minesweeper, The Role of the Motor Minesweepers in World War II, Michael J Melvin ISBN 1-872017-57-6