A.are the same as their Light List number
B.are marked in 6 inch figures with retroreflective material
C.increase with the even numbers to starboard
D.decrease with the odd numbers to starboard
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A.light characteristic
B.color of the uppermost band
C.shape of an unlighted buoy
D.color of the light
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
最新試題
When latitude and longitude are used，these shall be expressed in（）（and decimals of a minute if necessary），north or south of the Equator and east or west of Greenwich.
（） is a defined area within which ships must use particular caution and should follow the recommended direction of traffic flow.
When using horizontal sextant angles of three objects to fix your position，an indeterminate position will result in which situation（）.
How would you pass a red buoy in the maritime buoyage system“A” （）.
When navigating a vessel，you（）.
Which of the following are data layer categories to be displayed on ECDIS（）．
The recording fathometer produces a graphic record of the（）.
When navigating a vessel，you（）.
When entering a channel from seaward，the numbers on buoys（）.
Restricted areas at locks and dams are indicated by（）.