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深拖系统是中国大洋协会于１９９５年初首次从美国ＳＩＭＲＡＤ公司引进的。该系统具有旁侧声纳、浅层剖面、深海电视和深海照相四种功能，可在大洋地质调查中用于微地形地貌测量、沉积剖面测量、对海底目标进行实时录像和拍照。该系统的引进主要用于大洋锰结核调查，同时也可服务于海底电缆、管道工程的路线勘测和各种目标的寻找。本文详细介绍了该系统的组成、功能及简单的工作原理，并给出了海试的部分结果。
Deep tow system is the first time China Ocean Association in early 1995 from the United States SIMRAD company introduced. The system has four functions: side sonar, shallow profile, deep-sea television and deep-sea photography. It can be used for the measurement of micromorphology and geomorphology, sedimentary profile measurement, real-time recording and photographing of the underwater target in oceanic geology survey. The introduction of the system is mainly used for marine manganese nodules survey, but also can serve the undersea cables, pipeline project route survey and the search for a variety of goals. This article describes in detail the composition of the system, functions and simple working principle, and gives some of the results of sea trials.