单项选择题
A vessel will NOT show sidelights when（）.
A.underway but not making way
B.making way，not under command
C.not under command，not making way
D.trolling underway
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相关考题
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单项选择题
Two short blasts of the whistle have all of the following meanings EXCEPT（）.
A.I intend to meet you starboard to starboard
B.I do not intend to hold course and speed
C.I intend to overtake you on your port side
D.I intend to alter my course to port -
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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 -
单项选择题
While underway，in fog，you hear a whistle signal of one prolonged blast followed by two short blasts. This signal is sounded by a vessel（）.
A.not under command
B.being towed
C.on pilotage duty
D.aground
