A.Chart No.1
B.Catalog of Charts
C.IMO Practical Navigator
D.IMO Light List
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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
A.with
B.in
C.by
D.to
最新試題
Every chart is liable to be incomplete（）.
The soundings on the chart are based on the depth of water available at （）.
The arrangement of charts in the catalogue is（）.
Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.
When using a Lambert conformal chart in high latitudes，angles such as bearings are measured in reference to （）.
The numeral in the center of a wind rose circle on a pilot chart indicates the （）.
Which information is found in the chart title（）.
What defines a great circle? （）
The maximum difference between mean time and apparent time is （）.
On a Mercator chart，1 nautical mile is equal to（）.