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Locate two identifiable marks, buoys or other fixed objects on the navigation chart, that are within ten degrees of
the north/south line.
Plot a course between the two points located in the previous step on the chart.
Position the boat down range of the fixed objects selected.
Visually position the boat in line with the two fixed objects.
Keep the boat as true as possible on the line created between the fixed points.
Keeping the boat on the line, travel in a northerly direction.
10. Using the port/starboard screw (1), adjust the compass until the compass reads north.
11. Keeping the boat on the line travel in a southerly direction.
12. Take note of any error on the compass.
If adjustment of the compass is required while traveling in the southerly direction, an
alignment problem exists. The compass will need to be removed and re-aligned with the
keel of the boat. Perform this alignment procedure only if the compass requires adjustment
while traveling in a southerly direction on the line previously used to travel north.
13. Rotate the compass one half of the error noted in step 9a.