默认题库 - 分道通航制

单选题

A light used to signal passing intentions must be an（）.

A. alternating red and yellow light
B. alternating white and yellow light
C. all-round white or yellow light
D. all-round white light only

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单选题

A power-driven vessel leaving a quay or wharf must sound what signal? （）

A. Three short blasts
B. A long blast
C. A prolonged blast
D. No signal is required

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单选题

A power-driven vessel pushing aheador towing alongside displays navigation lights and（）.

A. two all-round red lights in a vertical line
B. two yellow towing lights in a vertical line
C. two white masthead lights in a vertical line
D. two lights on the stern，one yellow and one white

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单选题

A sailing vessel is overtaking a power-driven vessel in a narrow channel，so as to pass on the power-driven vessel’s port side. The overtaken vessel will have to move to facilitate passage. The sailing vessel is the（）.

A. stand-on vessel and would sound two short blasts
B. give-way vessel and would sound no whistle signal
C. stand-on vessel and would sound no whistle signal
D. give-way vessel and would sound two prolonged blasts followed by two short blast

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单选题