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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 ...
SLQ-25 Nixie aboard USS Iowa TB-14A towed decoy, from the AN/SLQ-25A/C "Nixie" system. 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 ...
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 .
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]
Q-ships, also known as Q-boats, decoy vessels, special service ships, or mystery ships, were heavily armed merchant ships with concealed weaponry, designed to lure submarines into making surface attacks. This gave Q-ships the chance to open fire and sink them.
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.
This Canadian goose decoy by Crowell shattered records when it sold for a staggering $1.13 million at a private sale in 2007. Its near-perfect condition, coupled with Crowell’s reputation, means ...
Mobile submarine simulator; S. Sieglinde (decoy) This page was last edited on 31 December 2018, at 22:04 (UTC). Text is available under the Creative Commons ...