A pilot vessel on pilotage duty at night will show sidelights and a sternlight ______.
A.when at anchor
B.only when making way
C.at any time when underway
D.only when the identifying lights are not being shown
单选题A pilot vessel may continue to sound an identity signal if she is （）.A underway，but not making wayB agroundC being towedD not engaged in pilotage duty
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单选题A power-driven vessel not under command at night must show her sidelights when（）.A making headwayB making no headwayC moored to a buoyD at anchor
单选题Underway at night，a vessel displaying the lights shown is（）.A Engaged in fishingB Mine sweepingC A pilot boatD Under sail
单选题In a crossing situation，a vessel fishing must keep out of the way of a vessel which is（）.A under sailB towingC restricted in her ability to maneuverD engaged in pilotage duty
单选题A vessel will NOT show sidelights when（）.A underway but not making wayB making way，not under commandC not under command，not making wayD trolling underway
单选题A vessel showing a green light over a white light in a vertical line above the level of the sidelights is（）.A engaged in underwater constructionB under sail and powerC a pilot vesselD trawling
单选题A single vessel being towed alongside shall exhibit（）.A one all-round white lightB sidelights and a sternlightC only the outboard sidelight and a sternlightD a masthead light，sidelights，and a sternlight
