| 摘要 |
A ship-borne sonar system includes a two-dimensional array of electromechanical transducers mounted on, or near, the focal surface of a concave spherical reflector to transmit and receive acoustic pulses in respective directions throughout a sideways sector of surveillance from the ship. A gating unit couples only some of the transducers to respective transmission-reception channels, the particular combination of transducers selected being controlled by a steering unit to stabilize or otherwise steer the transmission-reception direction within the surveillance-sector. Each detected echo is displayed with a directionality dependent upon which of the channels detected that echo.
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