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Torpedo defence includes evasive maneuvers, passive defense like torpedo belts, torpedo nets, torpedo bulges, and sonar torpedo sensors, "soft-kill" active countermeasures like sonar decoys and sonar jammers, and "hard-kill" active defenses, like anti-torpedo torpedoes similar in idea to missile defense systems. [1]
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 ...
A torpedo on a rail A detonator on a railway line in Belgium South African example. Typical uses of detonators include: A warning, caution or stop signal in dense fog, when signals are difficult to see; A warning of a train stopped on the line ahead by an incident or accident—the train crew are usually responsible for placing the detonators
The system is difficult to jam, but it can be distracted by other ships crossing the wake. In 2013, the US Navy tested prototypes of a system known as the Countermeasure Anti-Torpedo (CAT), [2] which had been designed to intercept and destroy the incoming torpedo. Deployment of the system did not proceed as planned due to performance issues. [3]
The SSTDS combined the passive detection of the Torpedo Warning System (TWS) that finds, classifies, and tracks torpedoes with the hard-kill capability of a Countermeasure Anti-Torpedo (CAT), an encapsulated miniature torpedo designed to locate, home in on, and destroy hostile torpedoes. [32]
In addition, the system offers a method of underwater communications, and also functions as a torpedo approach warning system. This sonar is the Chinese development of French Thomson-CSF TSM-2233 sonar, and is capable of simultaneously tracking 4 to 12 targets depending on the function it is used for.
The Mark 54 lightweight torpedo (formerly known as lightweight hybrid torpedo, or LHT) is a standard 12.75-inch (324 mm) anti-submarine warfare (ASW) torpedo used by the United States Navy. Development
Early designs may have relied solely on an inertial guidance system. [9] [10] The initial design was intended for nuclear warhead delivery. Later designs reportedly include terminal guidance and conventional warheads. [7] The torpedo steers using four fins that skim the inner surface of the supercavitation gas bubble.