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“This is as exciting as it's going to get,” Warren joked as he dropped the echo sounder overboard.

IN 1968, when Schindler was 4 months old, his crib was a wooden box used to ship a sonar echo sounder to a research station in remote western Ontario province in Canada.

Chile’s national fisheries service authorized Marine Harvest to use a vessel with an echo sounder, making it easier to detect schools of fish.

HMS Echo will have a pretty accurate fathometer - an echo sounder - to determine the depth.

The traces on the echo sounder got stronger and stronger, until at 13.06, the Trieste landed on the bottom, kicking up a cloud of white ooze.