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 short-long dashed magenta line around Gardiners Island marks（）.
The maximum difference between mean time and apparent time is （）.
A chart position enclosed by a square is a（n）（）.
On a Mercator chart，1 nautical mile is equal to（）.
Which chart symbol indicates the bottom is clay（）.
What information is NOT found in the chart title? （）
The description Racon beside an illustration on a chart would mean a （）.
Every chart is liable to be incomplete（）.
The broken magenta lines（long and short dashes）in and around Mobjack Bay indicate（）.
Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.