单项选择题

The rules require which factor to be taken into account……

The rules require which factor to be taken into account when determining safe speed（）.

A.The construction of the vessel
B.The experience of the vessel's crew
C.The location of vessels detected by radar
D.All of the above

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单项选择题The Navigation Rules state that a vessel shall be operated at a safe speed at all times so that she can be stopped within（）.

A.The distance of visibility
B.1/2 the distance of visibility
C.A distance appropriate to the existing circumstances and conditions
D.The distance that it would require for the propeller to go from full ahead to full astern

单项选择题The look-out must be able（）full attention to the（）of a proper look-out．

A.to give/keep
B.giving/keeping
C.giving/keep
D.to give/keeping

单项选择题She（the vessel）shall if necessary（）and in any event navigate with extreme caution until danger of collision is over.

A.take all her way off
B.take her way all off
C.take her way off
D.take off her all way

单项选择题SAFE SPEED is defined as that speed where（）.

A.you can stop within your visibility range
B.you can take proper and effective action to avoid collision
C.you are traveling slower than surrounding vessels
D.no wake comes from your vessel

单项选择题In order for a stand-on vessel to take action in a situation，she must determine that the other vessel（）.

A.Is restricted in her ability to maneuver
B.Has sounded the danger signal
C.Is not taking appropriate action
D.Has not changed course since risk of collision was determined