A.frequent
B.so frequent
C.frequent that
D.so frequent that
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A.To consider
B.To check
C.To examine
D.To agree with
A.cylindrical projection
B.simple conic projection
C.polyconic projection
D.rectangular projection
A.after every major hydrographic survey of the area covered by the chart
B.when there are numerous corrections to be made or the corrections are extensive
C.when a low-stock situation occurs and minor corrections are made
D.every two years to update the magnetic variation information
A.Mercator projection
B.polyconic projection
C.orthographic projection
D.gnomonic projection
A.Summary of Corrections
B.Local Notice to Mariners
C.Daily Memorandum
D.Chart Correction Card
最新試題
Which chart symbol indicates the bottom is clay（）.
The only cylindrical chart projection widely used for navigation is the （）.
A chart with a scale of 1:80，000 would fall into the category of a（）.
The survey information upon which a chart is based is found （）.
The short-long dashed magenta line around Gardiners Island marks（）.
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（）.
The revision date of a chart is printed on which area of the chart? （）
The description Racon beside an illustration on a chart would mean a （）.
Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.
When navigating in high latitudes and using a chart based on a Lambert conformal projection，（）.