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
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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
A.encountered
B.met
C.contacted
D.seen
A.the differing light colors
B.one system having odd numbers while the other system has even numbers
C.one system using horizontal bands while the other system uses vertical stripes
D.the difference in the periods of the light
最新試題
Which buoy will NOT display white retro reflective material（）.
（） is a defined area within which ships must use particular caution and should follow the recommended direction of traffic flow.
The points on the earth’s surface where the magnetic dip is 90° are（）.
On a chart，the characteristic of the light on a lighthouse is shown as flashing white with a red sector.The red sector（）.
Which of the following are data layer categories to be displayed on ECDIS（）．
Restricted areas at locks and dams are indicated by（）.
Depiction of TSS's on charts uses（）as the primary color.
In very high latitudes，the most practical chart projection is the（）.
When navigating a vessel，you（）.
The equator is（）.