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
On a Mercator chart，1 nautical mile is equal to（）.
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?（）
Which aid is NOT marked on a chart with a magenta circle? （）
The short-long dashed，magenta lines parallel to York River Entrance Channel mark（）．
The soundings on the imperial chart are measured in（）.
The shoreline on charts generally represents the mean（）.
Which information is found in the chart title（）.
The broken magenta lines（long and short dashes）in and around Mobjack Bay indicate（）.
The maximum difference between mean time and apparent time is （）.
The numeral in the center of a wind rose circle on a pilot chart indicates the （）.