A.White buoy with a green top
B.White and international orange buoy
C.Yellow buoy
D.Yellow and black vertically-striped buoy
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A.Running fix
B.Fix
C.Dead-reckoning position
D.Estimated position
A.Current can be determined by measuring the direction and distance between simultaneous EP and DR positions
B.The drift of the current should be averaged out on a one hour basis
C.After the current is determined，it should not be used for further plotting because it is an unknown variable
D.The distance between a simultaneous DR position and fix is equal to the drift of the current
A.Dead reckoning position
B.Leeway position
C.Estimated position
D.Set position
A.ECDIS warnings and messages
B.Hydrographic Office data
C.Notice to Mariners information
D.All of the above
A.Safe water mark
B.Isolated danger mark
C.Preferred channel mark
D.Daymark of no lateral significance
最新試題
Which of the following are data layer categories to be displayed on ECDIS（）．
A celestial body will cross the prime vertical circle when the latitude is numerically （）.
When a buoy marks a channel bifurcation，the preferred channel is NOT indicated by（）.
When approaching a preferred-channel buoy，the best channel is NOT indicated by the（）.
What is an ebb current（）.
The recording fathometer produces a graphic record of the（）.
Restricted areas at locks and dams are indicated by（）.
Which buoy will NOT display white retro reflective material（）.
（） is not likely to be a methods of Traffic Separation.
The four standard light colors used for lighted aids to navigation are red，green，white，and （）.