单项选择题
A.fixed red light B.flashing light C.white light D.occulting light
A white buoy with an orange rectangle on it displays（）....
单项选择题A white buoy with an orange rectangle on it displays（）.
A.directions B.dangers C.exclusion areas D.All of the above
A white buoy with an open-faced orange diamond on it in...
单项选择题A white buoy with an open-faced orange diamond on it indicates（）.
A.danger B.vessels are excluded from the area C.the buoy is a mooring buoy D.operating restrictions are in effect
A white buoy with a blue band is（）.A.an isolated danger...
单项选择题A white buoy with a blue band is（）.
A.an isolated danger mark B.a hydrographic data collection buoy C.a mooring buoy D.marking a restricted area
