A.Three balls in a vertical line
B.Two balls in a vertical line
C.One ball near the foremast and one ball at each yardarm
D.One diamond near the foremast and one ball at each yardarm
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A.such risk shall be deemed to exist
B.such risk shall not be deemed to exist
C.you needn't take any action to avoid collision with any vessel
D.you should accelerate your speed ahead
A.by long distance
B.by the darkness at night
C.by a vessel in front
D.by fog or falling snow
A.Middle of the channel
B.Starboard side of the channel
C.Port side of the channel
D.Side of the channel that has the widest turns
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
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
最新試題
Which vessel is NOT classified as “restricted in her ability to maneuver” （）.
Vessels should maintain a sharp lookout，especially during December through March，when navigating the right whale’s only known calving grounds which lie off the coasts of（）.
You are under sail and overtaking a tug and tow.Which action is correct（）.
Which vessel is NOT to be regarded as restricted in her ability to maneuver（）.
When you doubt the existence of risk of collision,（）.
When underway in a channel，you should keep to the（）.
Which one of two crossing power-driven vessels has the right of way in a fog（）.
Which display indicates a vessel conducting mineclearance operations（）.
You see a vessel displaying three lights in a vertical line.The highest and lowest lights are red and the middle light is white.She is also showing a white light at the stern，which is lower than the forward light.It could be a（）.
You hear the fog signal of another vessel forward of your beam.Risk of collision may exist.You MUST（）.