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

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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

单项选择题

In determining a safe speed（）shall not be among those taken into account.

A.the state of visibility
B.the power of the vessel
C.the traffic density
D.the maneuverability of the vessel

单项选择题

In determining a safe speed（）shall not be among those taken into account.

A.the presence of the background light at night
B.the state of wind，sea and current
C.the number of crew on board
D.the draught in relation to the available depth of water