acoustic torpedo

Passive acoustic torpedoes home in on emissions from a target.

I'm afraid we haven't yet found the answer to acoustic torpedoes and glider bombs.

Now two of the acoustic torpedoes had gone.

Acoustic torpedoes are usually designed for medium-range use, and often fired from a submarine.

Acoustic torpedoes can be compared to modern fire-and-forget guided missiles.

To the delight of the engineers, the submarine had intact secret acoustic torpedoes on board.

Today, acoustic torpedoes are mostly used against submarines.

Later, acoustic torpedoes were used.

It was a measure against our acoustic torpedoes, to keep them away from the ship's hull and detonate them in the wake.

But here again there were failures among the "Gnat' acoustic torpedoes which were not operationally ready.

During this cruise, the ship was also engaged in operations testing experimental defensive devices intended to protect American ships against acoustic torpedoes.

This risk was later mitigated by requiring submarines to dive to 60 meters and go completely silent after launching acoustic torpedoes.

The submarine fired two acoustic torpedoes at a range of 2000 meters and then dove to 100 meters to escape a counterattack.

The Germans, in-turn, countered this by introducing newer and upgraded versions of the acoustic torpedoes, like the late war G7es.

She left Norway equipped with six contact and eight T-5 "GNAT" acoustic torpedoes.

The submarine fired a single T-5 Gnat - German Navy Acoustic Torpedo.

It was known as the GNAT (German Navy Acoustic Torpedo) to the British.

At any rate, the Allies countered acoustic torpedoes with noisemaker decoys such as Foxer, FXR, CAT and Fanfare.

There had indeed been plenty of bangs, but no less than 14 acoustic torpedoes had been detonated by the noise made by the wake of enemy ships, or exploded too late.

This noise seduced the simple guidance mechanisms of acoustic torpedoes away from the rear of the ship into a circling pattern around the noise maker until the torpedo ran out of fuel.

Active acoustic torpedoes home in on the reflection of a signal, or "ping", from the torpedo or its parent vehicle; this has the disadvantage of giving away the presence of the torpedo.

He did some work on acoustic torpedoes in Chesapeake Bay, and when being approached by Bell Laboratories, subsequently went to the Pacific theatre to train submarine crews in the use of that technology.

Nabob was torpedoed without warning; Macintyre had just given the order for all screening ships to deploy their CAT noise-makers (to seduce any acoustic torpedoes away from the ships), when Bickerton was also hit.

The Kriegsmarine had received at least two partially corrupted unsigned coded emergency messages around the time of the U-boat's disappearance, leading to a theory that U-377 had been sunk by one of its own Zaunkoenig T-5 acoustic torpedoes.

It was replaced by the G7es/T5 "Zaunkönig" (referred to by the Allies as GNAT, for German Navy Acoustic Torpedo), which was faster and better able to home onto the sound of fast moving warships as well as merchant traffic.