Original British name for sonar (Sound Navigation and Ranging). A device that sends out an underwater sound pulse to detect objects (submarines). If the sound pulse strikes an object it is reflected back, and by knowing the time taken for the round-trip the distance of the object can be estimated. The direction of the sound pulse is controlled by the operator, with reflections this giving a distance and bearing for the object. The name comes from the Allied Submarine Detection Investigation Committee, which investigated the system in 1917.
Igama lemveli laseBhilitane elibhekiselele kwi-"sonar' (Sound Navigation and Raging). Isixhobo esithumela ukubetha kwesandi phantsi kwamanzi ngenjongo yokucupha izinto ezingeenkwili. Ukuba ukubetha kwesandi sento ethile kunika ingxelo, kuze ngokwaziwa kwexesha elithathwa ngumjikelo wesandi kukwazeke ukuqikelelwa umgama wento leyo. Icala lokubetha kwesandi kulawulwa ngumsebenzi. Igama lisusela kwi-Allied Submarine Detection Investion Committee, eyaphengulula esi sixhobo ngo-1917.