A.light characteristic
B.color of the uppermost band
C.shape of an unlighted buoy
D.color of the light
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A.the shape of an unlighted buoy
B.the light color of a lighted buoy
C.the color of the topmost band
D.whether the number is odd or even
A.Errors due to unusual parallax are eliminated
B.The same body can be used for a fix from observations separated by several minutes
C.The declination is the only information needed from the almanac
D.The semidiameter correction of the sextant altitude is eliminated
A.Group flashing
B.Composite group flashing
C.Interrupted quick flashing
D.Fixed and flashing
A.Red buoy with a horizontal yellow band
B.Red and white vertically-striped buoy with a vertical yellow stripe
C.Red and white vertically-striped buoy with a red spherical topmark
D.Green buoy with a yellow square
A.Dead-reckoning position
B.Estimated position
C.Fix
D.Running fix
最新試題
（） is not likely to be a methods of Traffic Separation.
What is an ebb current（）.
Depiction of TSS's on charts uses（）as the primary color.
（） is a circular traffic lane used at junctions of several routes，within which traffic moves counterclockwise around a separation point or zone.
You have been informed that dredging operations may be underway in your vicinity.Which buoy indicates the dredging area（）.
The four standard light colors used for lighted aids to navigation are red，green，white，and （）.
You should plot your dead reckoning position（）.
The recording fathometer produces a graphic record of the（）.
In very high latitudes，the most practical chart projection is the（）.
When approaching a preferred-channel buoy，the best channel is NOT indicated by the（）.