a sonar instrument that uses echolocation to measure depths under water.
sonic depth finder
an instrument for detecting the depth of water or of a submerged object by means of sound waves; Fathometer See also sonar
noun 1. acoustic mine. acoustic mine noun 1. a naval mine designed to be exploded by the vibration of the propeller of a passing ship or by the sound of water along the hull.
noun, (used with a singular verb) 1. the branch of science that deals with the practical applications of sound. noun 1. (functioning as sing) (physics) the study of mechanical vibrations in matter
noun 1. any of the longitudinal series of segments or parts into which the body of certain animals is divided; a metamere. 2. Embryology. one member of a series of paired segments into which the thickened dorsal zone of mesoderm is divided. noun 1. (embryol) any of a series of dorsal paired segments of mesoderm […]
- Some zs
something on the ball