Ballast water can insure the ocean liners voyage safety and high transport efficiency.

船舶普遍使用的压载水，是现代远洋船舶航海安全和高效营运的保证。

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Voyage Data Recorder is an equipment which can record ship navigation status and manipulation information and take an important role on navigation safety at sea and accident analysis.

船载航行数据记录仪是一种记录船舶航行状态及操作信息的装置，对加强船舶的海上航行安全以及事故分析起到了极为重要的作用。

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Voyage Data Recorder (VDR) is an equipment which can record ship navigation status and manipulation information and take an important role on navigation safety at sea and accident analysis.

船载航行数据记录仪vdr是一种记录船舶航行状态及操作信息的装置，对加强船舶的海上航行安全以及事故分析起到了极为重要的作用。

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