單項(xiàng)選擇題

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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單項(xiàng)選擇題

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

單項(xiàng)選擇題

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