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2. Rare-earth magnet - Wikipedia

   en.wikipedia.org/wiki/Rare-earth_magnet

   Ferrofluid on glass, with a rare-earth magnet underneath. A rare-earth magnet is a strong permanent magnet made from alloys of rare-earth elements.Developed in the 1970s and 1980s, rare-earth magnets are the strongest type of permanent magnets made, producing significantly stronger magnetic fields than other types such as ferrite or alnico magnets.

3. Aggressive-class minesweeper - Wikipedia

   en.wikipedia.org/wiki/Aggressive-class_minesweeper

   Magnetic sweeping, with a towed device producing a magnetic field to trigger magnetic mines. To protect the minesweeper itself against magnetic mines, the hull and superstructure of the ship are made of wood. Other components are made of non-magnetic materials, and any magnetic materials are strictly controlled.

4. Borndiep-class minesweeper - Wikipedia

   en.wikipedia.org/wiki/Borndiep-class_minesweeper

   The minesweepers of the Borndiep-class were equipped with mechanic, acoustic and magnetic sweepers. [5] The magnetic sweeper consisted of two cables through which electricity would pulse and as a result would create a magnetic field that would detonate magnetic mines. [6] [7] As acoustic sweeper it had an electric hammer clock that would be ...

5. List of minesweeper classes - Wikipedia

   en.wikipedia.org/wiki/List_of_minesweeper_classes

   MMS-class minesweeper (403 ships, launched 1940—1945) inshore acoustic / magnetic motor minesweepers; Algerine-class minesweeper (98 ships, launched 1941—1945) twin-screw multi-role minesweeping sloops; Catherine-class minesweeper (22 ships, transferred from the US Navy in 1941 under the Lend-Lease program) twin-screw multi-role ...

6. Beemster-class minesweeper - Wikipedia

   en.wikipedia.org/wiki/Beemster-class_minesweeper

   As built the ships were equipped with a W Mk 3 mod 1 mechanical sweep and either a A X Mk 6B or A X Mk 4V acoustic sweeper. [2] Furthermore, it had a double machine gun of 20 mm. [1] Later, in the 1960s and 1970s, the ships got equipped with a MB 5 magnetic sweeper. [2]

7. MMS-class minesweeper - Wikipedia

   en.wikipedia.org/wiki/MMS-class_minesweeper

   In the early months of the Second World War, Germany made extensive use of magnetic mines, which led to a requirement for a wooden minesweeper, less vulnerable than steel trawlers. [1] The resultant design, the 105 ft-class [ 2 ] (also known as the MMS 1 series [ 3 ] and later the Type 1501 series [ 4 ] ) was built between 1940 and 1944.