Question 59Navigation General

70% to pass

Magnetic information on a chart may be _______________.

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

The correct answer is D) All of the above. Magnetic information on a nautical chart can be indicated in multiple ways: 1) Isogonic lines show the variation between true north and magnetic north at different locations on the chart. 2) The compass rose(s) on the chart include the magnetic variation at the chart's center. 3) Additional notes on the chart may provide supplementary magnetic information, such as annual change in variation. Therefore, all of the listed options are correct ways that magnetic information can be presented on a nautical chart.

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Official Resources
USCG Navigation Rules (COLREGS) 33 CFR Navigation Rules USCG National Maritime Center
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