單項選擇題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（）.

A.DR plot
B.track line
C.heading
D.estimated course


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1.單項選擇題The only cylindrical chart projection widely used for navigation is the （）.

A.Lambert conformal
B.Mercator
C.azimuthal
D.gnomonic

2.單項選擇題The numeral in the center of a wind rose circle on a pilot chart indicates the （）.

A.total number of observations
B.average wind force on the Beaufort scale
C.average wind force in knots
D.percentage of calms

3.單項選擇題The maximum difference between mean time and apparent time is （）.

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

4.單項選擇題The description Racon beside an illustration on a chart would mean a （）.

A.radar conspicuous beacon
B.circular radiobeacon
C.radar transponder beacon
D.radar calibration beacon

5.單項選擇題The compass rose on a nautical chart indicates both variation and （）.

A.deviation
B.annual rate of variation change
C.precession
D.compass error