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 short-long dashed magenta line around Gardiners Island marks（）.
A chart position enclosed by a square is a（n）（）.
The revision date of a chart is printed on which area of the chart? （）
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 description Racon beside an illustration on a chart would mean a （）.
That the scale of any part of a chart to be larger than the scale of the survey is（）.
What information is NOT found in the chart title? （）
Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.
What is NOT an advantage of the rhumb line track over a great circle track? （）