A.be green in color
B.have an even number
C.be left to port when entering from seaward
D.be cylindrical in shape
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A.fixed red light
B.Morse (A) white light
C.green light
D.flashing red light
A.gnomonic curve
B.small circle
C.meridian
D.great circle
A.relative bearing
B.range line
C.track line
D.estimated position
A.painted color
B.light color and phase characteristic
C.type of structure
D.All of the above
A.fixed red light
B.Morse (A) white light
C.composite group-flashing light
D.yellow light
最新試題
A mid-channel buoy，if lighted，will show a（）.
An orange and white buoy marking a danger area will have what symbol on it?（）
A plane that cuts the Earth’s surface and passes through the poles will always form（）.
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
Except for N-S courses，and E-W courses on the equator，a great circle track between two points，when compared to a rhumb line track between the same two points，will（）.
A special purpose buoy shall be（）.
Buoys which mark dredging areas are painted（）.