sonic depth finder

noun

a sonar instrument that uses echolocation to measure depths under water.
Also called echo sounder.
Compare Fathometer.

Origin of sonic depth finder

First recorded in 1925–30

Words nearby sonic depth finder

soni-, sonia, sonic, sonic barrier, sonic boom, sonic depth finder, sonication, sonics, soniferous, sonification, sonne bacillus

British Dictionary definitions for echo sounder (1 of 2)

echo sounder

noun

a navigation and position-finding device that determines depth by measuring the time taken for a pulse of high-frequency sound to reach the sea bed or a submerged object and for the echo to return

Derived forms of echo sounder

echo sounding, noun

British Dictionary definitions for echo sounder (2 of 2)

sonic depth finder

noun

an instrument for detecting the depth of water or of a submerged object by means of sound waves; Fathometer See also sonar