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
On a Mercator chart，1 nautical mile is equal to（）.
The arrangement of charts in the catalogue is（）.
The survey information upon which a chart is based is found （）.
The shoreline on charts generally represents the mean（）.
（）is not a position-fixing system.
The soundings on the imperial chart are measured in（）.
The maximum difference between mean time and apparent time is （）.
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（）.
A chart with a scale of 1:80，000 would fall into the category of a（）.
The soundings on the chart are based on the depth of water available at （）.