The Secret War

Although the magnetic mine had been invented by the British in 1917, interest had languished in Britain between the wars, and it was the Germans who were to develop the device to new levels of deadly effectiveness. This is the story of how two navel officers calmly and fearlessly dismantled the first German magnetic mine on a sand bar off Shoeburyness, and reveals how its various successors were discovered and countered by the British.