单项选择题
A.not be regarded as a vessel B.in general，keep well clear of all vessels C.proceed at a slower speed than surrounding vessels D.when making way，show the lights for a vessel not under command
The rules require which factor to be taken into account...
单项选择题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
The Navigation Rules state that a vessel shall be opera...
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
The look-out must be able（）full attention to the（）of a ...
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
