A.Course-planning
B.Position-fixing
C.Radar-plotting
D.Stowage-plan making
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A.frequent
B.so frequent
C.frequent that
D.so frequent that
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
最新試題
What information is found in the chart title? （）
Which chart symbol indicates the bottom is clay（）.
When using a Lambert conformal chart in high latitudes，angles such as bearings are measured in reference to （）.
The path that a vessel is expected to follow，represented on a chart by a line drawn from the point of departure to the point of arrival，is the（）.
On a Mercator chart，1 nautical mile is equal to（）.
Particular care is needed when navigating in the vicinity of（）as very few of these features have been fully surveyed to modern standards to determine their correct position，full extent，or the least depth over them.
Charts showing the coast of Mexico are produced by the United States（）.
That the scale of any part of a chart to be larger than the scale of the survey is（）.
The only cylindrical chart projection widely used for navigation is the （）.
The shoreline on charts generally represents the mean（）.