| 单词 | sonic depth finder |
| 释义 | > as lemmassonic depth finder depth finder n. an apparatus for sounding the sea; spec. sonic depth finder one in which the measurement is made by timing the echoes from the sea-bottom of sound waves transmitted from the ship. ΘΚΠ society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > depth-finder depth recorder1911 depth finder1923 Fathometer1925 echo-sounder1927 echometer1937 1923 Hydrographic Rev. I. 72 Navy sonic depth finder recently developed at the Engineering Experiment Station, Annapolis, Maryland. 1948 R. de Kerchove Internat. Maritime Dict. 232/1 Echo sounder... Also called depth finder. < as lemmas |
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