Depiction of TSS's on charts uses（）as the primary color.

单项选择题A celestial body will cross the prime vertical circle when the latitude is numerically （）.

A.Greater than the declination and both are of the same name
B.Less than the declination and both are of the same name
C.Greater than the declination and both are of contrary name
D.Less than the declination and both are of contrary name

单项选择题（） is not likely to be a methods of Traffic Separation.

A.Separation of opposing streams of traffic by separation zones or lines
B.The separation of through traffic from local traffic by provision of inshore traffic zones
C.Division of traffic from several different direction into sectors
D.Control of routing traffic through shipping routes

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

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