"We have a sonar target two hundred twenty meters, bearing one one two degrees."

Rubis was struck on 4 October 1949, and sank on 31 January 1958 to be used as a sonar target.

If nothing floated up then they would move to the next sonar target.

The target strength or acoustic size is a measure of the reflection coefficient of a sonar target.

When mixed with seawater, the calcium hydride produced large quantities of hydrogen which bubbled out of the container, creating a false sonar target.

She was sunk in 1958 to be used as a sonar target.

The small gas canisters filled the disturbance with bubbles that made excellent sonar targets while Chicago sped north.

A sonar target is small relative to the sphere, centred around the emitter, on which it is located.

Otherwise, its own noise would tend to drown out other sonar targets.

It immediately started giv- ing off bubbles like an Alka-Seltzer tablet, creating a new, if immobile, sonar target for the torpedo's tracking sonar.