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珠委勘测总队于1981年引进的MRS—Ⅲ型自动测深定位系统,经过一年多的试验,1983年初已开始进行大面积水下地形测量。同年上半年在完成西江磨刀门口测量任务后,于6月至10月初支援水电部华东勘测设计院对长江口北支水下地形的测量。这项测量任务是长江三角洲治理开发(“六·五”计划重点工程)的前期工作。
The MRS-Ⅲ automatic sounding and locating system introduced by the Inspector General of the Pearl Commission in 1981 introduced a large area underwater topographic survey in early 1983 after more than one year of testing. In the first half of the same year, after completing the task of measuring the entrance to the Xijiang Shao Gate, the East China Survey and Design Institute of the Ministry of Water Resources and Hydropower was assisted to measure the underwater terrain of the northern branch of the Yangtze Estuary from June to early October. This measurement task is the preparatory work for harnessing and developing the Yangtze River Delta (“the 6th Five-Year Plan” key project).