A.points of equal variation
B.points of zero variation
C.the magnetic latitude
D.magnetic dip
您可能感興趣的試卷
你可能感興趣的試題
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
Which information is found in the chart title（）.
Every chart is liable to be incomplete（）.
The maximum difference between mean time and apparent time is （）.
When a buoy is in position only during a certain period of the year，where may the dates when the buoy is in position be found?（）
When navigating in high latitudes and using a chart based on a Lambert conformal projection，（）.
That the scale of any part of a chart to be larger than the scale of the survey is（）.
The short-long dashed magenta line around Gardiners Island marks（）.
Which chart symbol indicates the bottom is clay（）.
The arrangement of charts in the catalogue is（）.
The survey information upon which a chart is based is found （）.