单项选择题

Magnetic information on a chart may be （）.

A.found in the center(s) of the compass rose(s)
B.indicated by isogonic lines
C.found in a note on the chart
D.All of the above

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单项选择题

Entering from sea，a daymark on the port side of the channel would be indicated on a chart by a （）.

A.red triangle with the letter R
B.white triangle with the letters RG
C.green square with the letter G
D.white square with the letters GR

单项选择题

Distance along a track line is measured on a Mercator chart by using the （）.

A.latitude scale near the middle of the track line
B.longitude scale near the middle of the track line
C.latitude scale at the midlatitude of the chart
D.latitude or longitude scale at the middle of the scale

单项选择题

Attention is （）the advice on the use of charts in The Mariner’s Handbook Chapter 3，Section 1.

A.fixed to
B.needed for
C.pushed to
D.drawn to