题目内容

If your vessel is the stand-on vessel in a crossing situation ______.

A. you must keep your course and speed
B. you may change course and speed as the other vessel must keep clear
C. the other vessel must keep her course and speed
D. both vessels must keep their course and speed

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If you wishied to transmit a message by voice concerning the safety of navigation, you would preface it by the word ______.

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