If your vessel were proceeding down river (descending)，a green square marker with a green reflector border on the right bank would be a（）.<br>A:mile board<br>B:dredging mark<br>C:passing daymark<br>D:crossing daymark

If your vessel were proceeding down river (descending)，a green square marker with a green reflector border on the right bank would be a（）.
A:mile board
B:dredging mark
C:passing daymark
D:crossing daymark

出自：海船船员证

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