The AMVER system requires（）.<br>A:Sailing plans to be sent before departure<br>B:More frequent reports in heavy weather<br>C:Arrival reports to be sent within 8 hours of arrival<br>D:A position report within 24 hours of departure

The AMVER system requires（）.
A:Sailing plans to be sent before departure
B:More frequent reports in heavy weather
C:Arrival reports to be sent within 8 hours of arrival
D:A position report within 24 hours of departure

出自：海船船员证

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