單項選擇題（） 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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1.單項選擇題（） 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

2.單項選擇題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

3.單項選擇題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

4.單項選擇題When making landfall at night，you can determine if a light is a major light or an offshore buoy by（）.

A.the intensity of the light
B.checking the period and characteristics against the Light List
C.the color，because the buoy will have only a red or a green light
D.Any of the above can be used to identify the light

5.單項選擇題When entering from seaward，a buoy displaying a single-flashing red light would indicate （）.

A.a junction with the preferred channel to the left
B.a sharp turn in the channel to the right
C.the starboard side of the channel
D.a wreck to be left on the vessel's port side