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The first submarine decoys were the German Bold fitted to U-boats of World War II. These were a pellet of calcium hydride in a simple metal container. On contact with sea water, the calcium hydride decomposed to produce a trail of hydrogen gas bubbles that acted as a bubble curtain and reflected ASDIC impulses to produce a false target. The ...
The Sieglinde was powered by electric motors, allowing it to move at 6 knots (11 km/h; 6.9 mph) and to periodically ascend or dive, thus imitating the sonar return of an actual submarine. This allowed the real U-boat to slip away quietly from pursuing ships. It was typically used in combination with Pillenwerfer (or Bold) decoys. [2]
This is a list of submarines on display around the world separated by country. This list contains all preserved submarines and submersibles on display, including submarine museum boats , that currently exist as complete boats or as significant structural sections.
The mobile submarine simulator (MOSS) MK70 is a sonar decoy used by submarines of the United States Navy.It was a 10-inch vehicle, without an explosive warhead, but able to generate both an active sonar echo and a passive sound signature recorded to be extremely similar to that of the launching submarine.
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Post-war U.S. diagram of a Bold canister. 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.
The Titanic sub that was lost with five passengers aboard near the wreck of the famed liner likely imploded hours before a massive search and rescue was even launched, says the US Coast Guard.
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.