If the circumstances admit，（）of small alteration of course and speed shall not be taken to avoid collision.

单项选择题If the circumstances of the case admit，any vessel（）in a narrow channel.

A.shall have the liberty to anchor
B.shall avoid anchoring
C.shall moor to a buoy when necessary
D.shall keep anchoring

单项选择题In a crossing situation，a stand-on vessel which is forced to take action in order to avoid collision with a vessel on her own port side shall，if possible，avoid（）.

A.turning to port
B.turning to starboard
C.decreasing speed
D.increasing speed

单项选择题In a crossing situation，the stand-on vessel should normally（）.

A.take action to cross ahead of the other vessel
B.take action to pass astern of the other vessel
C.maintain course and speed
D.change course and increase speed

单项选择题In complying with the Rules，of what must the mariner take due regard?（）.

A.Limited backing power of his vessel
B.Radar information about nearby vessels
C.The occupation of the other vessel，if known
D.All of the above

单项选择题In dense fog a vessel without operational radar may not be justified（）at all but should anchor if it is safe and practicable for her to do so.

A.to be underway
B.on under way condition
C.to stop engine
D.in being under way