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Concept
Torpedo
Summary
A modern torpedo is an underwater ranged weapon launched above or below the water surface, self-propelled towards a target, and with an explosive warhead designed to detonate either on contact with or in proximity to the target. Historically, such a device was called an automotive, automobile, locomotive, or fish torpedo; colloquially a fish. The term torpedo originally applied to a variety of devices, most of which would today be called mines. From about 1900, torpedo has been used strictly to designate a self-propelled underwater explosive device.
While the 19th-century battleship had evolved primarily with a view to engagements between armored warships with large-caliber guns, the invention and refinement of torpedoes from the 1860s onwards allowed small torpedo boats and other lighter surface vessels, submarines/submersibles, even improvised fishing boats or frogmen, and later light aircraft, to destroy large ships without the need of large guns, though sometimes at the risk of being hit by longer-range artillery fire.
Modern torpedoes are classified variously as lightweight or heavyweight; straight-running, autonomous homers, and wire-guided types. They can be launched from a variety of platforms. In modern warfare, a submarine-launched torpedo is almost certain to hit its target; the best defense is a counterattack using another torpedo.
The word torpedo comes from the name of a genus of electric rays in the order Torpediniformes, which in turn comes from the Latin torpere ("to be stiff or numb"). In naval usage, the American Robert Fulton introduced the name to refer to a towed gunpowder charge used by his French submarine (first tested in 1800) to demonstrate that it could sink warships.
Torpedo-like weapons were first proposed many centuries before they were successfully developed. For example, in 1275, Arab engineer Hasan al-Rammah – who worked as a military scientist for the Mamluk Sultanate of Egypt – wrote that it might be possible to create a projectile resembling "an egg", which propelled itself through water, whilst carrying "fire".
Official source
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