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单选题
Green lights may appear on（）.
A
horizontally banded buoys
B
vertically striped buoys
C
yellow buoys
D
spherical buoys
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考题
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单选题Red lights may appear on（）.A
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单选题The prohibition against displaying lights which may be confused with required navigation lights applies（）.A
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单选题A vessel constrained by her draft may display（）.A
three all-round red lights instead of the lights required for a power-driven vessel of her classB
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单选题Restricted areas at locks and dams are indicated by（）.A
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单选题Uncharted lights, fog signals and radar beacon transmissions may be（）near the station.A
encounteredB
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two all-round red lights in a vertical lineB
three all-round red lights in a vertical lineC
two all-round yellow lights in a vertical lineD
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单选题If a towing vessel and her tow are severely restricted in their ability to change course，they may show lights in addition to their towing identification lights. These additional lights may be shown if the tow is（）.A
pushed aheadB
towed alongsideC
towed asternD
Any of the above
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