The Shadowy World Of Submarine And Ship-Launched Torpedo Countermeasures
Surviving below the waves relies primarily on stealth, but if detected, countermeasures may be your only shot of keeping out of a watery grave.
By Aaron AmickMay 14, 2020
The War Zone
Historically speaking, torpedo countermeasures have been a tool used to buy time for a ship or submarine trying to escape an attack, but 21st-century naval technology is changing the way they are used. Today, countermeasures can be used as a defensive device or as a distraction that opens up an opportunity to attack. So, let’s take a dive into this shadowy world, starting with the four basic types of torpedo countermeasures: maskers, jammers, decoys, and anti-torpedo devices, as well as their differences and how they are tactically employed.
Broadband passive sonar systems found on modern submarines identify a target by contrasting the broadband energy signal-to-noise ratio (SNR) with quieter background noise. This contrast is displayed as different shades or colors on the sonar screen forming traces that waterfall down from the top. Broadband acoustic masking devices that interfere with a sonar's ability to differentiate background noise from a contact, like the Naval Acoustic Electromechanical (NAE) Beacon Mk 3, are the simplest of torpedo countermeasures.
https://www.thedrive.com/the-war-zone/33467/the-shadowy-world-of-submarine-and-ship-launched-torpedo-countermeasures-an-explainer
