20 Facts About Naval mine

Naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines.

Jacobi Naval mine was designed by German-born, Russian engineer Jacobi, in 1853.

British experienced a stroke of luck in November 1939, when a German Naval mine was dropped from an aircraft onto the mudflats off Shoeburyness during low tide.

The Naval mine detected this loss of the magnetic field which caused it to detonate.

On 21 November 1939, a Naval mine broke her keel, which damaged her engine and boiler rooms, as well as injuring 46 men with one man later dying from his injuries.

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Germans developed a pressure-activated Naval mine and planned to deploy it as well, but they saved it for later use when it became clear the British had defeated the magnetic system.

Later, the American antenna Naval mine was widely used because submarines could be at any depth from the surface to the seabed.

Generally, this type of Naval mine is set to float just below the surface of the water or as deep as five meters.

The sophistication of influence Naval mine fuses has increased considerably over the years as first transistors and then microprocessors have been incorporated into designs.

Alternatively, the Naval mine can be programmed specifically to ignore all surface vessels regardless of size and exclusively target submarines.

Anti-sweep Naval mine is a very small Naval mine with as small a floating device as possible.

Russian invention, the rocket Naval mine is a bottom distance Naval mine that fires a homing high-speed rocket upwards towards the target.

In WWII, aircraft came into favour for Naval mine laying with one of the largest examples being the mining of the Japanese sea routes in Operation Starvation.

Each Naval mine is recorded for later clearing, but it is not unusual for these records to be lost together with the ships.

Japanese merchant shipping suffered tremendous losses, while Japanese Naval mine sweeping forces were spread too thin attending to far-flung ports and extensive coastlines.

Japanese Naval mine sweeping was unsuccessful; and the Japanese abandoned Palau as a base when their first ship attempting to traverse the swept channel was damaged by a Naval mine detonation.

Sometimes "cutters", explosive devices to cut the Naval mine's wire, are used to lessen the strain on the sweeping wire.

However, as Naval mine warfare became more developed this method became uneconomical.

The computerised fuze on a Stonefish Naval mine contains acoustic, magnetic and water pressure displacement target detection sensors.

The Naval mine weighs 990 kilograms and contains a 600 kilogram aluminised PBX explosive warhead.