It is an advanced, effective technical means for maritime traffic management and accident analysis to establish a maritime accident information system based on electronic chart technology.
采用电子海图技术建立水上交通事故信息系统，已经成为海上交通管理、事故分析的一个先进有效的技术手段。
However, both alone has some limitations, in order to enhance the safety of maritime navigation, it is necessary to radar images superimposed display on the electronic navigation chart.
但是两者单独使用有一定的局限性，为了更好的提高海上航行安全，实现雷达图像与电子海图叠加显示是必要的。
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