A.points of equal variation
B.points of zero variation
C.the magnetic latitude
D.magnetic dip
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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
A.with
B.in
C.by
D.to
最新試題
A chart position enclosed by a square is a（n）（）.
What information is NOT found in the chart title? （）
Which chart symbol indicates the bottom is clay（）.
The arrangement of charts in the catalogue is（）.
That the scale of any part of a chart to be larger than the scale of the survey is（）.
On a Mercator chart，1 nautical mile is equal to（）.
The soundings on the chart are based on the depth of water available at （）.
Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.
The shoreline on charts generally represents the mean（）.
When using a Lambert conformal chart in high latitudes，angles such as bearings are measured in reference to （）.