A power-driven vessel，when towing astern，shall show（）.<br>A:two towing lights in a vertical line<br>B:a towing light in a vertical line above the sternlight<br>C:two towing lights in addition to the sternlight<br>D:a small white light in lieu of the sternlight

A power-driven vessel，when towing astern，shall show（）.
A:two towing lights in a vertical line
B:a towing light in a vertical line above the sternlight
C:two towing lights in addition to the sternlight
D:a small white light in lieu of the sternlight

出自：海船船员证

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