A.1 minute of longitude
B.1 degree of longitude
C.1 minute of latitude
D.1 degree of latitude
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A.the final judge of the reliance the mariner can place on the information given
B.its immediate importance cannot always be verified before promulgation
C.through imperfections in the survey on which it is based，or subsequent alterations to the topography or sea floor
D.deferring the promulgation of certain less important information
A.National Geospatial-Intelligence Agency
B.Coast Guard
C.Naval Observatory
D.National Ocean Service
A.sailing chart
B.general chart
C.coastal chart
D.harbor chart
A.Azimuthal gnomonic projection
B.Lambert conformal projection
C.Transverse Mercator projection
D.Polyconic projection
A.fix
B.estimated position
C.dead reckoning position
D.running fix
最新試題
The numeral in the center of a wind rose circle on a pilot chart indicates the （）.
What information is found in the chart title? （）
The shoreline on charts generally represents the mean（）.
The soundings on the imperial chart are measured in（）.
The short-long dashed magenta line around Gardiners Island marks（）.
The description Racon beside an illustration on a chart would mean a （）.
A chart with a scale of 1:80，000 would fall into the category of a（）.
（）is not a position-fixing system.
Every chart is liable to be incomplete（）.
Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.