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Measure your course

Place the center of the Charting Pal so that it rests on top of your course line at the beginning of your leg. Find a latitude or longitude line that corresponds to a red square on the Charting Pal. You can now read your course heading on the outer ring of the Charting Pal.

When lining up your tool with the black lines on your chart it is preferable to use the longitude, as it is always pointing north. That said, latitude lines work just fine.

Using the example above we have a course heading of 130 degrees. This number is called a true course number.