海图标绘仪能执行许多种导航任务。

Chartplotters can perform many navigational tasks.

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STCW公约明确要求500总吨或以上船舶，负责航行值班的高级船员能使用雷达和自动雷达标绘仪保持安全航行。

STCW definitely order that the officer of watch onboard a ship of more than 500 ton must have the ability to use radar and ARPA to keep the voyage in safe stage.

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ARPA(自动雷达标绘仪)是当今船舶导航避碰主要的辅助设备，如果使用得当，无疑对船舶航行安全将起到积极的作用。

ARPA (Automatic Radar Plotting Aids) is a ship's main assistant equipments for navigation and collision. If it is to be used correctly, no doubt it will make active effect to ship's navigation.

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