A.fixed red light
B.flashing light
C.white light
D.occulting light
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A.directions
B.dangers
C.exclusion areas
D.All of the above
A.danger
B.vessels are excluded from the area
C.the buoy is a mooring buoy
D.operating restrictions are in effect
A.an isolated danger mark
B.a hydrographic data collection buoy
C.a mooring buoy
D.marking a restricted area
A.submerged rock，not dangerous to navigation
B.sunken wreck，not dangerous to navigation
C.towed-under buoy
D.All of the above
A.underway
B.making way
C.dead in the water
D.a power driven vessel
最新試題
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
A rock and sand structure extending from the bank of the river toward the channel is known as a（）.
Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
A yellow buoy may mark a(n)（）.
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
A nun buoy will（）.
How is the intensity of a light expressed in the Light Lists?（）.
A structure，usually made of stone，or cement pilings，which extends from the bank at approximately right angles to the current is called a（）.
How would you pass a red buoy in the maritime buoyage system “A”? （）