单项选择题

The Rules state that certain factors are to be taken into account when determining safe speed. One of the factors is the（）.

A.radio communications that are available
B.maximum speed of your vessel
C.temperature
D.current

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单项选择题

The rules require that a stand-on vessel SHALL take action to avoid collision when she determines that（）.

A.risk of collision exists
B.the other vessel will cross ahead of her
C.the other vessel is not taking appropriate action
D.collision cannot be avoided by the give-way vessel's maneuver alone

单项选择题

The risk of collision shall be deemed to exist if the compass bearing of an approaching vessel （）.

A.did not appreciably change
B.does not appreciably change
C.do not appreciably change
D.not appreciably change

单项选择题

The effectiveness of the action shall be carefully checked until the other vessel is finally （）.

A.past
B.clear
C.past or clear
D.past and clear