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单选题
You are underway and pass by a lighthouse.Its light，which was white since you first sighted it，changes to red．This means（）.
A
The light is characterized as alternately flashing
B
The lighthouse has lost power and has switched to emergency lighting
C
It is the identifying light characteristic of the lighthouse
D
You have entered an area of shoal water or other hazard
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更多 “单选题You are underway and pass by a lighthouse.Its light，which was white since you first sighted it，changes to red．This means（）.A The light is characterized as alternately flashingB The lighthouse has lost power and has switched to emergency lightingC It is the identifying light characteristic of the lighthouseD You have entered an area of shoal water or other hazard” 相关考题
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考题
单选题You are underway and pass by a lighthouse. Its light，which was white since you first sighted it，changes to red. This means（）.A
the light is characterized as alternately flashingB
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考题
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Figure eight turnB
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a watch which is kept with lower standardB
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考题
单选题You are underway in thick fog.You have not determined if risk of collision exists.Which statement is true?（）A
Your speed must be reduced to bare steerage waysB
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考题
单选题You are underway in reduced visibility.You hear the fog signal of another vessel about 20° on your starboard bow.Risk of collision may exist.You should（）.A
alter course to starboard to pass around the other vesselB
reduce your speed to bare steeragewayC
slow your engines and let the other vessel pass ahead of youD
alter course to port to pass the other vessel on its portside
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考题
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stay near the middle of the channelB
keep to the starboard side of any vessels you meetC
exchange whistle signals with any other vessels in the channelD
keep to the side of the channel which lies to your starboard
考题
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
考题
单选题In which source could you find the number of a chart for a certain geographic area?（）A
Chart No.1B
Catalog of ChartsC
IMO Practical NavigatorD
IMO Light List
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