单项选择题
A vessel constrained by her draught may，in addition to the lights prescribed for power-driven vessels in Rule 23，exhibit where they can best be seen（）or a cylinder.
A.two all-round red lights in a vertical line
B.three all-round red lights in a vertical line
C.two all-round yellow lights in a vertical line
D.three all-round green lights in a vertical line
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相关考题
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单项选择题
A vessel conducting mine clearing operations will show（）.
A.three balls in a vertical line
B.two balls in a vertical line
C.one ball near the foremast and one ball at each fore yard
D.one diamond near the foremast head and one ball at each fore yard -
单项选择题
A vessel being towed will show（）.
A.a forward masthead light
B.sidelights and a sternlight
C.a towing light
D.All of the above -
单项选择题
A vessel being towed astern shall show at night（）.
A.the lights required for a power-driven vessel underway
B.only the required masthead lights
C.a sternlight only
D.sidelights and a sternlight
