echo sounder

The echo sounder indicated the bottom was coming up fast.

There were two echo sounders, one with a recording pen.

In 1923, the company produced the first practical recording echo sounder.

The humble echo sounder is considered by many as the most important aid to navigation.

Echo sounders are often used to provide data on marine life abundance, distribution, and behavior information.

Mainly, echo sounders on ships were used to map the darkness below.

The invention of the echo sounder in 1912 reached a new significance for the international marine research.

Extensive river survey was also carried out with Echo sounder for conducting model studies.

Today, sounding is usually done with an instrument called an echo sounder, a form of sonar.

To do this, we searched specifically for fish with the Skipper 603 echo sounder.

We slowly circled the wreck, watching its mass rise from the bottom on the echo sounder.

"Echo sounder reports the seafloor has risen fifteen hundred feet in the last five miles."

The wreck is considerably broken up, and is hard to find on an echo sounder.

Since the water is clear and the shore steep-to, echo sounders are desirable, but not essential.

A big splodge of blue, green and yellow dots was registering on the echo sounder.

'We go back and cruise that area, keeping an eye on the echo sounder.

Sonars or echo sounder are typical sources for very high resolution imaging.

In 1926 she resumed surveys and became the first Canadian research vessel to be fitted with an echo sounder.

The echo sounders would have found them.

It was as a benefactor of mankind, not a thief, that I passed the echo sounder over the wall.

The resulting bubbles can be observed rising, by echo sounder, but are seldom visible at the surface.

An hour and twenty minutes into the chase, the echo sounder recorded an anomaly rising 60 feet off the bottom.

Trawling has also been a major activity, with the use of radio navigation aids and echo sounders making life easier now.

Finally, echo sounders and other seismic devices would be attached to the faces of Big Brother.

Using a portable echo sounder, the team took measurements of the volume of the glacier.