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单选题
A mooring buoy，if lighted，shows which color light?（）
A
Yellow
B
White
C
Blue
D
Any color except red or green
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Which word indicates color variation in the characteristics of a light?A.OpposingB.ChangingC.ReversingD.Alternating
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单选题When a buoy marks a channel bifurcation，the preferred channel is NOT indicated by（）.A
the shape of an unlighted buoyB
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单选题At 1920，the buoy forward of your starboard beam is（）.A
an interrupted quick flashing buoyB
Hog Island Lighted Bell BuoyC
South Light BuoyD
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单选题A buoy，being a shape of cylinder and with red group flashing，shows that it is（）.A
left-side buoyB
right-side buoyC
a buoy of safetyD
a buoy of danger
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单选题Aids to navigation marking the intracoastal waterway can be identified by（）.A
the letters ICW after the aid's number or letterB
yellow stripes，squares，or triangles marked on themC
white retroreflective materialD
the light characteristic and color for lighted aids
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单选题A white buoy with an open-faced orange diamond on it indicates（）.A
dangerB
vessels are excluded from the areaC
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单选题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 locationB
If the light is flashing，the buoy should be considered to be in the charted locationC
The buoy may not be in the charted positionD
The buoy should be considered to be in the charted position if it has been freshly painted
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单选题A lighted preferred-channel buoy may show a（）.A
fixed red lightB
Morse (A) white lightC
composite group-flashing lightD
yellow light
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单选题What is the light characteristic of a lighted，preferred-channel buoy? （）A
Group flashingB
Composite group flashingC
Interrupted quick flashingD
Fixed and flashing
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单选题A mid-channel buoy，if lighted，will show a（）.A
fixed red lightB
Morse (A) white lightC
green lightD
flashing red light
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单选题A mooring system that results in a spread system without anchor buoys is called a（）.A
permanent chasing systemB
wire rope mooring systemC
shepherd's crook mooring systemD
spring buoy mooring system
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单选题Which word indicates color variation in the characteristics of a light?（）A
OpposingB
ChangingC
ReversingD
Alternating
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odd or even numbersB
the color of their top bandC
the location of the buoy in the channel junctionD
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单选题The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the（）.A
SetB
FrequencyC
PeriodD
Function
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单选题Lighted white and orange buoys must show which color light?（）A
OrangeB
WhiteC
RedD
Alternating yellow and white
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单选题When picking up your mooring at the buoy，the correct method is to（）.A
approach the buoy with the wind and current asternB
approach the buoy with the wind and current aheadC
approach the buoy with wind and sea abeamD
stop upwind and up current and drift down on the buoy
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Increasing bearings of Southeast Point LightD
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单选题You are mooring to a buoy．You should approach the buoy with the current from（）.A
aheadB
broad on the bowC
abeamD
astern
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单选题A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）A
FlashingB
Morse AC
Equal intervalD
Occulting
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单选题The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the starboard side of a vessel（）.A
ascending the riverB
descending the riverC
crossing the riverD
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单选题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 buoyB
you should stay to the west or south of the buoyC
the buoy is a major lighted buoyD
nothing special for navigational purposes
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单选题An alternating light（）.A
shows a light with varying lengths of the lighted periodB
shows a light that changes colorC
marks an alternate lesser-used channelD
is used as a replacement for another light
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单选题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 lightB
checking the period and characteristics against the Light ListC
the color，because the buoy will have only a red or a green lightD
Any of the above can be used to identify the light
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单选题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 starboardB
Alter course to starboard and leave the buoy to portC
Alter course and leave the buoy near by on either sideD
Alter course and pass the buoy well-off on either side
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