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
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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
A.Hifix
B.Hyperfix
C.Trisponder
D.WGS84
最新試題
A chart with a scale of 1:80，000 would fall into the category of a（）.
Every chart is liable to be incomplete（）.
The short-long dashed magenta line around Gardiners Island marks（）.
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?（）
What is NOT an advantage of the rhumb line track over a great circle track? （）
The numeral in the center of a wind rose circle on a pilot chart indicates the （）.
Which information does the outer ring of a compass rose on a nautical chart provide（）.
The description Racon beside an illustration on a chart would mean a （）.
The broken magenta lines（long and short dashes）in and around Mobjack Bay indicate（）.
Particular care is needed when navigating in the vicinity of（）as very few of these features have been fully surveyed to modern standards to determine their correct position，full extent，or the least depth over them.