单选题Which vessel，when anchored at night，is NOT required to show anchor lights?（）.AA power-driven vesselBA vessel engaged on pilotage dutyCA vessel dredgingDA vessel restricted in her ability to maneuver
单选题
Which vessel，when anchored at night，is NOT required to show anchor lights?（）.
A
A power-driven vessel
B
A vessel engaged on pilotage duty
C
A vessel dredging
D
A vessel restricted in her ability to maneuver
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