A.ECDIS warnings and messages
B.Hydrographic Office data
C.Notice to Mariners information
D.All of the above
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A.Safe water mark
B.Isolated danger mark
C.Preferred channel mark
D.Daymark of no lateral significance
A.The objects lie in a straight line
B.The vessel is inside of a triangle formed by the objects
C.The vessel is outside of a triangle formed by the objects
D.A circle will pass through your position and the three objects
A.Can always rely on a buoy to be on station
B.Can always rely on a buoy to show proper light characteristics
C.Should assume a wreck buoy is directly over the wreck
D.Should never rely on a floating aid to maintain its exact position
A.Fathoms and meters
B.Miles and kilometers
C.Arc and degrees
D.Degrees and minutes
A.A current at minimum flow
B.A current coming in
C.A current going out
D.A current at maximum flow
最新試題
When making landfall at night，you can determine if a light is a major light or an offshore buoy by（）.
The four standard light colors used for lighted aids to navigation are red，green，white，and （）.
When using horizontal sextant angles of three objects to fix your position，an indeterminate position will result in which situation（）.
Restricted areas at locks and dams are indicated by（）.
Which statement concerning current is TRUE（）.
When using a buoy as an aid to navigation which of the following should be considered?（）
What is an ebb current（）.
（） is a circular traffic lane used at junctions of several routes，within which traffic moves counterclockwise around a separation point or zone.
（） is a defined area within which ships must use particular caution and should follow the recommended direction of traffic flow.
When a buoy marks a channel bifurcation，the preferred channel is NOT indicated by（）.