A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Square
您可能感興趣的試卷
你可能感興趣的試題
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
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
A preferred-channel buoy will show a（）.
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
A relative bearing is always measured from（）.
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
A yellow buoy may exhibit a(n)（）.
A vessel is（）when she is not at anchor，made fast to the shore，or aground.
A special purpose buoy shall be（）.
A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.