A.Dead reckoning position
B.Leeway position
C.Estimated position
D.Set position
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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
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
最新試題
When entering from seaward，a buoy displaying a single-flashing red light would indicate （）.
The equator is（）.
What is a lighted safe water mark fitted with to aid in its identification（）.
You have been informed that dredging operations may be underway in your vicinity.Which buoy indicates the dredging area（）.
Which buoy will NOT display white retro reflective material（）.
What describes a flood current（）.
On a chart，the characteristic of the light on a lighthouse is shown as flashing white with a red sector.The red sector（）.
（） 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（）.
A celestial body will cross the prime vertical circle when the latitude is numerically （）.