In chapter 2, the embedded system, the technology of Electronic Navigation Chart (ENC) and a fish system are discussed.

第二章论述了嵌入式系统、电子海图导航和鱼探系统的相关技术。

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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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To solve the problem, we can use hypertext information navigation methods, including tour guide method, navigation chart method, search engine method, automatic hyperlink techniques, etc.

解决此问题需要使用超文本数据信息的导航方法：导游线路方法，导航图方法，利用搜索引擎，自动超链接技术等。

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"It should be noted that this small scale chart is considered to be unsuitable for close inshore navigation, " the UKHO told Lloyds.

BBC: Concordia disaster: House arrest for Captain Schettino

An investigation into the grounding is ongoing, but Navy officials said in January that the U.S. National Geospatial-Intelligence Agency, which prepares the digital navigation charts used by the Navy, has reported the location of the reef was misplaced on a chart by nine miles.

CNN: Minesweeper lifted from Philippine reef