The Rules state that certain factors are to be taken into account when determining safe speed. Those factors include（）.

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

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

单项选择题Sailing vessels are stand-on over power-driven vessels except（）.

A.in a crossing situation
B.in a meeting situation
C.when they are the overtaking vessel
D.on the inland waters of the PR China