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 description Racon beside an illustration on a chart would mean a （）.
What information is found in the chart title? （）
A chart with a scale of 1:80，000 would fall into the category of a（）.
That the scale of any part of a chart to be larger than the scale of the survey is（）.
Which information is found in the chart title（）.
The revision date of a chart is printed on which area of the chart? （）
The soundings on the imperial chart are measured in（）.
On a Mercator chart，1 nautical mile is equal to（）.
Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.
When navigating in high latitudes and using a chart based on a Lambert conformal projection，（）.