A.From every fix or running fix
B.From every estimated position
C.Every three minutes in pilotage waters
D.Only in pilotage waters
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A.White buoy with a green top
B.White and international orange buoy
C.Yellow buoy
D.Yellow and black vertically-striped buoy
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
最新試題
What is a lighted safe water mark fitted with to aid in its identification（）.
When a buoy marks a channel bifurcation，the preferred channel is NOT indicated by（）.
The recording fathometer produces a graphic record of the（）.
Which position includes the effects of wind and current（）.
Depiction of TSS's on charts uses（）as the primary color.
The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the（）.
When making landfall at night，you can determine if a light is a major light or an offshore buoy by（）.
You determine your vessel’s position by taking a range and bearing to a buoy.Your position will be plotted as a（n）（）.
Traffic separation schemes adopted by the IMO are listed in（）.
What is an ebb current（）.