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
Traffic separation schemes adopted by the IMO are listed in（）.
（） is a defined area within which ships must use particular caution and should follow the recommended direction of traffic flow.
When using a buoy as an aid to navigation which of the following should be considered?（）
Which of the following are data layer categories to be displayed on ECDIS（）．
You should plot your dead reckoning position（）.
（） is not likely to be a methods of Traffic Separation.
The points on the earth’s surface where the magnetic dip is 90° are（）.
Depiction of TSS's on charts uses（）as the primary color.
On a chart，the characteristic of the light on a lighthouse is shown as flashing white with a red sector.The red sector（）.
You have been informed that dredging operations may be underway in your vicinity.Which buoy indicates the dredging area（）.