A.mean low water
B.mean lower low water
C.mean high water
D.mean high water springs
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A.Top center
B.Lower-left corner
C.Part of the chart title
D.Any clear area around the neat line
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
最新試題
The revision date of a chart is printed on which area of the chart? （）
The shoreline on charts generally represents the mean（）.
The broken magenta lines（long and short dashes）in and around Mobjack Bay indicate（）.
Which information does the outer ring of a compass rose on a nautical chart provide（）.
The short-long dashed magenta line around Gardiners Island marks（）.
Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.
The only cylindrical chart projection widely used for navigation is the （）.
Which aid is NOT marked on a chart with a magenta circle? （）
The numeral in the center of a wind rose circle on a pilot chart indicates the （）.
The maximum difference between mean time and apparent time is （）.