A.keep well clear
B.keep very far
C.keep clear of
D.keep clear from
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A.small an angle
B.large an angle
C.either small or large an angle
D.neither small nor large an angle
A.at small angle
B.at large angle
C.at right angle
D.in same direction as
A.in restricted visibility
B.between dusk and dawn
C.in heavy traffic
D.All of the above
A.the prevention of collision
B.the promotion of the traffic flow
C.the complying of port regulation
D.the development of navigational technique
A.adopted
B.adapted
C.adjusted
D.admitted
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A towing light（）.
A vessel navigate in areas near the termination of traffic separation schemes shall do（）with particular caution.
You may（）traffic lane.
Is it clear（）traffic lane?
A vessel sounds one short blast. This signal indicates the vessel（）.
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 traffic separation zone is that part of a traffic separation scheme which（）.
A whistle signal of one prolonged，one short，one prolonged and one short blast，is sounded by a vessel（）.
A signal of one prolonged，one short，one prolonged，and one short blast，in that order is given by a vessel（）.
Systems of inbound and outbound lanes to promote the safe flow of vessel traffic in certain areas around the world are known as（）.