The steering and sailing rules for vessels in restricted visibility apply to vessels（）.<br>A:in sight of one another in fog<br>B:navigating in or near an area of restricted visibility<br>C:only if they are showing special purpose lights<br>D:only if they have operational radar

The steering and sailing rules for vessels in restricted visibility apply to vessels（）.
A:in sight of one another in fog
B:navigating in or near an area of restricted visibility
C:only if they are showing special purpose lights
D:only if they have operational radar

出自：海船船员证

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