radar watch (雷达值班) means observing displayed radar information, the frequency of observation depending upon the prevailing conditions;
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雷达值班
Radar watch
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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