echo sounding device, sonar, sound locator, echo sounder, acoustic radar, echosounder, fathometer, sonic depth finder, echometer, accoustic sounder
helilainete levimisel ja peegeldumisel põhinev veealune mõõtevahend veealuste objektide leidmiseks, nende kauguse ning vee sügavuse mõõtmiseks jne, echo sounding system for measurement of water depth, measurement technique that uses sound propagation under water (or occasionally in air) to navigate, communicate or to detect other vessels
