A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Square
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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
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
最新試題
An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? （）
Buoys which mark dredging areas are painted（）.
Branford reef is（）.
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
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 plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
A white buoy with an orange rectangle on it displays（）.
A mid-channel buoy，if lighted，will show a（）.
A parallel of latitude other than the equator is a（）.
How is the intensity of a light expressed in the Light Lists?（）.