The risk and the counter measure using GPS are discussed.

论述了使用GPS的风险及相应的对策。

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And battery life state which is important when you using GPS device.

和电池寿命状态，重要的是当您使用全球定位系统装置。

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So, using the GPS to mange the ship has been the truth.

利用GPS系统对船舶进行管理已成为现实。

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So, using the GPS to mange the ship has been the truth.

利用GPS系统对船舶进行管理已成为现实。

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