sonarn. 聲納學術名詞聲納:物理學、海洋科學、力學、地球科學、物理化學儀器設備、造船工程聲測位儀:物理學聲波導航與測距裝置:電力工程聲波定位儀:電力工程英文釋義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