A.Gray lines on the uppermost inset chart
B.Red lines on the main body of the chart
C.In parenthesis on the lines of equal magnetic variation
D.Annual rate of change is not shown
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A.Chart No.1
B.Catalog of Charts
C.IMO Practical Navigator
D.IMO Light List
A.points of equal variation
B.points of zero variation
C.the magnetic latitude
D.magnetic dip
A.magnetic latitudes
B.magnetic declinations
C.dip
D.isogonic lines
A.complete and often very poor surveys
B.correct and often very good surveys
C.inadequate and often very old surveys
D.adequate and present surveys
A.equipment's
B.tools
C.apparatus
D.aids
最新試題
A chart position enclosed by a square is a（n）（）.
On chart，bearings to near objects should be used in preference to objects farther off，because（）.
What defines a great circle? （）
Which information is found in the chart title（）.
The description Racon beside an illustration on a chart would mean a （）.
The soundings on the chart are based on the depth of water available at （）.
The path that a vessel is expected to follow，represented on a chart by a line drawn from the point of departure to the point of arrival，is the（）.
Which chart symbol indicates the bottom is clay（）.
The only cylindrical chart projection widely used for navigation is the （）.
The shoreline on charts generally represents the mean（）.