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

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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

单项选择题

Admiralty Charts are published in （）.

A.U.S.A
B.China
C.U.K
D.Japan