| 21. | She was requisitioned on 8 August 1940 as HMSAS " Parktown " and was converted to sweep magnetic mines.
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| 22. | A magnetic mine found in 1939 at Shoeburyness, now in Southend, allowed the German magnetic HMS Vernon in Portsmouth.
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| 23. | A new weapon was to be used : a large magnetic mine, that implemented a new energy mass-focusing concept.
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| 24. | On the morning of 1 January 1942 the Luftwaffe dropped two magnetic mines near Kilmacanogue but they did not explode.
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| 25. | In April 1941 " Salvia " was minesweeping in Greece and detonated five magnetic mines near the Port of Piraeus.
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| 26. | Kurchatov switched his research first to protecting shipping from magnetic mines, and later to tank armour, and finally to nuclear physics.
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| 27. | Farek's specialty in WAVES was " degaussing, " a process that demagnetized the hulls of ships so they wouldn't explode magnetic mines.
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| 28. | The British limpet adaptation was not the first magnetic mine and was not the reason why " Zimmerit " coating was developed.
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| 29. | The vessels also received degaussing against magnetic mines, and seamen were issued watertight survival suits if the ship had to be abandoned.
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| 30. | While she was passing down the Straits of Malacca on 9 September, at 07 : 44 a magnetic mine detonated to starboard.
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