sonar, echo sounder, asdic
(noun) a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return; “sonar is an acronym for sound navigation ranging”; “asdic is an acronym for antisubmarine detection investigation committee”
Source: WordNet® 3.1
Former codename during development, from ASD (Anti-Submarine Division). Sometimes erroneously explained as "Allied Submarine Detection Investigation Committee".
ASDIC (uncountable)
(historical) sonar
• acids, ascid, cadis, caids, sadic
Source: Wiktionary
27 April 2024
(adjective) remarkable or out of the ordinary in degree or magnitude or effect; “a great crisis”; “had a great stake in the outcome”
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