A.Gray lines on the uppermost inset chart
B.Red lines on the main body of the chart
C.In parenthesis on the lines of equal magnetic variation
D.Annual rate of change is not shown
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A.Chart No.1
B.Catalog of Charts
C.IMO Practical Navigator
D.IMO Light List
A.points of equal variation
B.points of zero variation
C.the magnetic latitude
D.magnetic dip
A.magnetic latitudes
B.magnetic declinations
C.dip
D.isogonic lines
A.complete and often very poor surveys
B.correct and often very good surveys
C.inadequate and often very old surveys
D.adequate and present surveys
A.equipment's
B.tools
C.apparatus
D.aids
最新試題
Which aid is NOT marked on a chart with a magenta circle? （）
The arrangement of charts in the catalogue is（）.
Charts showing the coast of Mexico are produced by the United States（）.
（）is not a position-fixing system.
A chart projection depicting the poles and a small area on either side of a connecting meridian，that is sometimes used for star charts，is the（）.
The description Racon beside an illustration on a chart would mean a （）.
Every chart is liable to be incomplete（）.
The only cylindrical chart projection widely used for navigation is the （）.
Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.
The maximum difference between mean time and apparent time is （）.