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 maximum difference between mean time and apparent time is （）.
On chart，bearings to near objects should be used in preference to objects farther off，because（）.
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 aid is NOT marked on a chart with a magenta circle? （）
When a buoy is in position only during a certain period of the year，where may the dates when the buoy is in position be found?（）
Every chart is liable to be incomplete（）.
Which chart symbol indicates the bottom is clay（）.