單項(xiàng)選擇題A current perpendicular to a vessel’s track has the greatest effect on the vessel’s course made good（）.

A.at high vessel speeds
B.at low vessel speeds
C.in shallow water
D.in deep water


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1.單項(xiàng)選擇題When compared to air temperature,which factor is most useful in predicting fog?（）

A.Vapor pressure
B.Dew point
C.Barometric pressure
D.Absolute humidity

2.單項(xiàng)選擇題Radiation fog is more commonly encountered in（）.

A.spring
B.later winter
C.autumn
D.end of summer

4.單項(xiàng)選擇題You are in charge of a stand-on vessel in a crossing situation.The other vessel is 1.5 miles to port.You believe that risk of collision exists.You should（）.

A.take avoiding action immediately upon determining that risk of collision exists
B.immediately sound the danger signal
C.take avoiding action only after providing the give-way vessel time to take action ,and determining that her action is not appropriate
D.hold course and speed until the point of extremis, and then sound the danger signal, taking whatever action will best avert collision

5.單項(xiàng)選擇題Instructions for on-board maintenance of each life-saving appliance shall not include（）.

A.a checklist for use when carrying out the inspections
B.list of crew members
C.maintenance and repair instructions
D.schedule of periodic maintenance