單項選擇題

When underway in a channel，you should if safe and practicable（）.

A.stay near the middle of the channel
B.keep to the starboard side of any vessels you meet
C.exchange whistle signals with any other vessels in the channel
D.keep to the side of the channel which lies to your starboard

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單項選擇題

When two vessels are in sight of one another and NOT in or near an area of restricted visibility，any of the following signals may be given EXCEPT（）.

A.a light signal of at least five short and rapid flashes
B.one prolonged，one short，one prolonged，and one short whistle blasts
C.four short whistle blasts
D.two short whistle blasts

單項選擇題

When taking action to avoid collision，you should（）.

A.Make sure the action is taken in enough time
B.Not make any large course changes
C.Not make any large speed changes
D.All of the above

When underway in a channel，you should if safe and practicable（）.

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When two vessels are in sight of one another and NOT in or near an area of restricted visibility，any of the following signals may be given EXCEPT（）.

When taking action to avoid collision，you should（）.

When two vessels are in sight of one another and NOT in or near an area of restricted visibility，any of the following signals may be given EXCEPT（）.

When taking action to avoid collision，you should（）.