A.fix
B.estimated position
C.dead reckoning position
D.running fix
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A.Course-planning
B.Position-fixing
C.Radar-plotting
D.Stowage-plan making
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
最新試題
The soundings on the chart are based on the depth of water available at （）.
Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.
The short-long dashed，magenta lines parallel to York River Entrance Channel mark（）．
The survey information upon which a chart is based is found （）.
A chart position enclosed by a square is a（n）（）.
What is NOT an advantage of the rhumb line track over a great circle track? （）
A chart with a scale of 1:80，000 would fall into the category of a（）.
On chart，bearings to near objects should be used in preference to objects farther off，because（）.
When navigating in high latitudes and using a chart based on a Lambert conformal projection，（）.
Every chart is liable to be incomplete（）.