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Definition of Echo sounding
1. Noun. Determining the location of something by measuring the time it takes for an echo to return from it.
Definition of Echo sounding
1. Noun. The technique of using reflected pulses of sound to determine depth or the location of objects (or fish) under water. ¹
2. Noun. A particular measurement made using this technique. ¹
¹ Source: wiktionary.com