ECDIS must give an alarm for which of the following cases （).A.When the specified limit fo

ECDIS must give an alarm for which of the following cases ().

A.When the specified limit for deviation from the planned route is exceeded

B.If the ship，within a specified time set by the watch officer，is going to cross a safety contour

C.If the ship，within a specified time set by the watch officer，is going to cross the boundary of a prohibited area

D.All of the above

请帮忙给出正确答案和分析，谢谢！

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