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
The arrangement of charts in the catalogue is（）.
The short-long dashed，magenta lines parallel to York River Entrance Channel mark（）．
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?（）
The shoreline on charts generally represents the mean（）.
A chart with a scale of 1:80，000 would fall into the category of a（）.
When navigating in high latitudes and using a chart based on a Lambert conformal projection，（）.
A chart position enclosed by a square is a（n）（）.
Which chart symbol indicates the bottom is clay（）.
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.
The soundings on the chart are based on the depth of water available at （）.