Meaning of SONAR in English

SONAR

[so.nar] n [sound navigation ranging] (1945): a method or device for detecting and locating objects esp. underwater by means of sound waves sent out to be reflected by the objects; also: a device for detecting the presence of a vessel (as a submarine) by the sound it emits in water

Merriam-Webster English vocab.      Английский словарь Merriam Webster.