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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A.Three short blasts
B.A long blast
C.A prolonged blast
D.No signal is required
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
A.The fishing vessel must keep clear of the vessel not under command
B.If the vessel not under command is a power-driven vessel，she must keep clear of the fishing vessel
C.They must exchange whistle signals
D.Both vessels are required to take action to stay clear of each other
A.An emergency boat and crew
B.A siren or rotating flashing light
C.Flashing red lights located one-half mile upstream and downstream of the facility
D.Buoys with flashing lights controlled from shore，located one-half mile upstream anddownstream of the facility
A.a single white light forward
B.two masthead lights in a vertical line
C.two towing lights in a vertical line
D.two all-round red lights where they can best be seen
最新試題
A vessel may enter a traffic separation zone（）.
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 vessel shall not（）.
A power-driven vessel leaving a quay or wharf must sound what signal? （）
A fishing vessel is approaching a vessel not under command. Which statement is TRUE? （）
A vessel not under command sounds the same fog signal as a vessel（）.
Is it clear（）traffic lane?
A facility used for the discharge of a cargo of a particular hazard，such as chlorine，butane or ethane，must have what to warn water traffic of an immediate danger during fire or cargo release?（）
A vessel constrained by her draft may display（）.
You may（）traffic lane.