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What is "echo sounder"

Wiktionary
echo sounder

alt. A sonar device used for echo sounding n. A sonar device used for echo sounding

WordNet
echo sounder

n. a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return; sonar is an acronym for sound navigation ranging; asdic is an acronym for anti-submarine detection investigation committee [syn: sonar, asdic]

Usage examples of "echo sounder".

The pilot of the research boat, Gary Marx, kept one eye trained on the echo sounder while scanning the river ahead with the other.

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

He glanced at the echo sounder every few seconds to make sure the seabed didn't take a sudden rise toward the keel.

He consulted his chart and made a slight course change before he turned and entered the channel as determined by the echo sounder.