A.wreck
B.shoal area
C.anchorage area
D.middle ground
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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
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
最新試題
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 nun buoy will（）.
A plane that cuts the Earth’s surface and passes through the poles will always form（）.
How would you pass a red buoy in the maritime buoyage system “A”? （）
A relative bearing is always measured from（）.
Buoys which mark isolated dangers are painted with alternating（）.
Fishing stake，the position of which frequently（），exist in the area covered by this chart.
Branford reef is（）.
A spherical buoy may be（）.
A mid-channel buoy，if lighted，will show a（）.