Yellow
White
Blue
Any color except red or green
第1题：
Which word indicates color variation in the characteristics of a light?
A.Opposing
B.Changing
C.Reversing
D.Alternating
第2题：
the shape of an unlighted buoy
the light color of a lighted buoy
the color of the topmost band
whether the number is odd or even
第3题：
Preferred channel buoys indicate the preferred channel to transit by ______.
A.odd or even numbers
B.the color of their top band
C.the location of the buoy in the channel junction
D.the buoy’s light rhythms
第4题：
danger
vessels are excluded from the area
the buoy is a mooring buoy
operating restrictions are in effect
第5题：
left-side buoy
right-side buoy
a buoy of safety
a buoy of danger
第6题：
You are steaming in a westerly direction along the Gulf Coast．You see ahead of you a lighted buoy showing a red isophase light．Which action should you take ________．
A.Alter course to port and leave the buoy to starboard
B.Alter course to starboard and leave the buoy to port
C.Alter course and leave the buoy near by on either side
D.Alter course and pass the buoy well-off on either side
第7题：
an interrupted quick flashing buoy
Hog Island Lighted Bell Buoy
South Light Buoy
Sand Shoal Inlet Lighted Buoy A
第8题：
The buoy symbol printed on your chart is leaning to the northeast. This indicates ______.
A.you should stay to the north or east of the buoy
B.you should stay to the west or south of the buoy
C.the buoy is a major lighted buoy
D.nothing special for navigational purposes
第9题：
the letters ICW after the aid's number or letter
yellow stripes，squares，or triangles marked on them
white retroreflective material
the light characteristic and color for lighted aids
第10题：
The buoy should be considered to always be in the charted location
If the light is flashing，the buoy should be considered to be in the charted location
The buoy may not be in the charted position
The buoy should be considered to be in the charted position if it has been freshly painted