How do torpedo countermeasures on submarines work?

Answer 1

Ay carumba, nobody here knows anything about it. I spent 22 years in the navy.

Torpedo countermeasures involve launching a drum like device full of compressed air. The compressed air is released in the form of tiny bubbles into the water.

This serves two functions: To passive sonar it sounds like propeller cavitation from a fast running submarine. To active sonar it looks like a big, fat target.

Normally, immediately after launching a countermeasure the escaping submarine will make a radical change in course, speed and depth.

Surface ships have a device called a Nixie that can be launched and towed behind the ship. The Nixie has a signal generator that acts as a decoy to torpedoes using passive sonar. They also have the ability to take an incoming sonar signal, from an active homing torpedo, and send the signal back at an intensified level thus making the torpedo think it's a target like a ship's hull.

Answer 2

Submarine Countermeasures

Answer 3

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RE:
How do torpedo countermeasures on submarines work?

Answer 4

Torpedo countermeasures make like a spinning submarine propeller which is what the enemy torpedo trys to lock on to using it's own sonar.

Answer 5

How Submarines Work

Answer 6

torpedoes are designed to follow either the heat signature or the metal a sumarine is made of. a countermeasure immitates these signatures and lures the torpedo away

Answer 7

They drive away from the submarine but try to fool the torpedo into thinking it is the submarine. Like a decoy. The torpedo hits the decoy(s), avoiding or decreasing damage to the real sub.

Answer 8

They are noise makers. They make noises that sound like a real sub. The torps are programed to seek the noise signature of the enemy and lock on. Same princple as air planes using flares to distract heat seeking missles.