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A sonar decoy is a device for decoying sonar. One may be released from a submarine or a surface vessel. A decoy acts as false targets for human operators and/or sonar-homing weapons such as acoustic torpedoes .
Bold (also called Bolde, a term derived from kobold) was a German sonar decoy, used by U-boats during the Second World War from 1942 onwards. It consisted of a metal canister about 10 cm (3.9 in) in diameter filled with calcium hydride.
Sieglinde [ˌziːkˈlɪndə] was a sonar decoy used during the Second World War by German U-boats. Sieglinde was installed in chambers on the sides of the U-boat. [1] It could be ejected to a considerable distance from the boat when attempting to hide from a seeker's sonar equipment.
Category: Sonar decoys. 2 languages. ... Mobile submarine simulator; S. Sieglinde (decoy) This page was last edited on 31 December 2018, at 22:04 ...
German submarine U-480 was an experimental Kriegsmarine Type VIIC U-boat of World War II.. Considered by many to be the first stealth submarine, it was equipped with a special rubber skin of anechoic tiles (codenamed Alberich, after the German mythological character who had the ability to become invisible), that made it difficult to detect with the Allies' ASDIC (sonar).
The AN/SLQ-25 Nixie and its variants are towed torpedo decoys used on US and allied warships. It consists of a towed decoy device (TB-14A) and a shipboard signal generator. The Nixie is capable of defeating wake-homing, acoustic-homing, and wire-guided torpedoes. The decoy emits signals to draw a torpedo away from its intended target.
Foxer decoy float resting on the top of the depth charge racks of HMS Hind (U39) Foxer was the code name for a British-built acoustic decoy used to confuse German acoustic homing torpedoes like the G7 torpedo during the Second World War. A US version codenamed FXR was deployed at the end of September 1943 on all transatlantic escort vessels. [1]
When successfully fooled, a U-boat could quickly become overwhelmed by several guns to its one, or defer from firing and try to submerge before it became mortally wounded. The first Q-ship victory was on 23 June 1915, when the submarine HMS C24, cooperating with the decoy vessel Taranaki, sank U-40 off Eyemouth.