单项选择题

（） is a circular traffic lane used at junctions of several routes，within which traffic moves counterclockwise around a separation point or zone.

A.Traffic Lane
B.Roundabout
C.Inshore Traffic Zone
D.Two-way Route

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单项选择题

（） is a defined area within which ships must use particular caution and should follow the recommended direction of traffic flow.

A.Recommended Direction of Traffic Flow
B.Roundabout
C.Separation Zone or Line
D.Precautionary Area

单项选择题

When using a buoy as an aid to navigation which of the following should be considered?（）

A.The buoy should be considered to always be in the charted location
B.If the light is flashing，the buoy should be considered to be in the charted location
C.The buoy may not be in the charted position
D.The buoy should be considered to be in the charted position if it has been freshly painted

单项选择题

When navigating a vessel，you（）.

A.can always rely on a buoy to be on station
B.can always rely on a buoy to show proper light characteristics
C.should assume a wreck buoy is directly over the wreck
D.should never rely on a floating aid to maintain its exact position