Risk of collision is considered to exist if（）.<br>A:four vessels are nearby<br>B:a vessel has a steady bearing at a constant range<br>C:there is any doubt that a risk of collision exists<br>D:a special circumstance situation is apparent

Risk of collision is considered to exist if（）.
A:four vessels are nearby
B:a vessel has a steady bearing at a constant range
C:there is any doubt that a risk of collision exists
D:a special circumstance situation is apparent

出自：海船船员证

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