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
The only cylindrical chart projection widely used for navigation is the （）.
What information is found in the chart title? （）
The soundings on the chart are based on the depth of water available at （）.
That the scale of any part of a chart to be larger than the scale of the survey is（）.
On chart，bearings to near objects should be used in preference to objects farther off，because（）.
A chart with a scale of 1:80，000 would fall into the category of a（）.
Which chart symbol indicates the bottom is clay（）.
A chart position enclosed by a square is a（n）（）.
The numeral in the center of a wind rose circle on a pilot chart indicates the （）.
When navigating in high latitudes and using a chart based on a Lambert conformal projection，（）.