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
A chart with a scale of 1:80，000 would fall into the category of a（）.
What information is found in the chart title? （）
Every chart is liable to be incomplete（）.
Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.
Which information does the outer ring of a compass rose on a nautical chart provide（）.
The revision date of a chart is printed on which area of the chart? （）
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（）.
When using a Lambert conformal chart in high latitudes，angles such as bearings are measured in reference to （）.
The path that a vessel is expected to follow，represented on a chart by a line drawn from the point of departure to the point of arrival，is the（）.
Which chart symbol indicates the bottom is clay（）.