A.Top center
B.Lower-left corner
C.Part of the chart title
D.Any clear area around the neat line
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A.DR plot
B.track line
C.heading
D.estimated course
A.Lambert conformal
B.Mercator
C.azimuthal
D.gnomonic
A.total number of observations
B.average wind force on the Beaufort scale
C.average wind force in knots
D.percentage of calms
A.equal to the longitude expressed in time units
B.about 16 minutes
C.the difference between the GHA of mean sun and the first point of Aries
D.15°of arc
A.radar conspicuous beacon
B.circular radiobeacon
C.radar transponder beacon
D.radar calibration beacon
最新試題
The soundings on the chart are based on the depth of water available at （）.
The short-long dashed magenta line around Gardiners Island marks（）.
The numeral in the center of a wind rose circle on a pilot chart indicates the （）.
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 maximum difference between mean time and apparent time is （）.
Every chart is liable to be incomplete（）.
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 information is NOT found in the chart title? （）
What defines a great circle? （）
The only cylindrical chart projection widely used for navigation is the （）.