A.From every fix or running fix
B.From every estimated position
C.Every three minutes in pilotage waters
D.Only in pilotage waters
您可能感興趣的試卷
你可能感興趣的試題
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
（） is a circular traffic lane used at junctions of several routes，within which traffic moves counterclockwise around a separation point or zone.
Restricted areas at locks and dams are indicated by（）.
When navigating a vessel，you（）.
Which buoy will NOT display white retro reflective material（）.
How would you pass a red buoy in the maritime buoyage system“A” （）.
What is an ebb current（）.
When entering a channel from seaward，the numbers on buoys（）.
Which of the following are data layer categories to be displayed on ECDIS（）．
When making landfall at night，you can determine if a light is a major light or an offshore buoy by（）.
You should plot your dead reckoning position（）.