72 deg 9.5'

The GPS puts us at 41 deg 15.2 min N and 72 deg 9.5 min E. Plot that position. At what true direction is  the Bartlett Reef Aton horn? And distance?

Now align the parallel rules with your position and Bartlett Reef

Now use the parallel rulers to draw a parallel latitude line at 41 deg 15.2 min.

Use dividers to measure the distance from your location to Bartlett Reef

Now walk the rulers to the compass rose and observe the angle

Now draw a parallel longitude line at 72 deg 9.5 min

First find the lat and
long on the chart

Continue

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1.5 nm

41 deg 15.2'

37 deg T