A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Rectangle
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A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Square
A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Square
A.wreck
B.shoal area
C.anchorage area
D.middle ground
A.fixed red light
B.flashing light
C.white light
D.occulting light
A.directions
B.dangers
C.exclusion areas
D.All of the above
最新試題
A preferred-channel buoy will show a（）.
A structure，usually made of stone，or cement pilings，which extends from the bank at approximately right angles to the current is called a（）.
A white buoy with an open-faced orange diamond on it indicates（）.
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）
A yellow buoy may mark a(n)（）.
A yellow buoy may exhibit a(n)（）.
From your position you observe a rotating white and green light to the north. This light is most likely（）.