Suppose you're lost on a large mazelike lake, but you can recognize two or more topographical features off in the distance. Use your compass to find your position by 'triangulation'.

Pick out a point on the horizon which you can identify - the Old Fire Tower. Shoot a magnetic bearing to the point. Change this magnetic bearing to a true bearing by reverse application of the rhyme, Declination West - Compass Best. The true bearing is then: 60° - 10° = 50°.
Set 50° on the compass dial, place your pencil point on the Old Fire Tower, and put the forward edge of one side of the compass base against the pencil point. Rotate the entire compass about the pencil until the orienteering arrow points to true north on the map. Caution: do not turn the compass dial. Now …. using the compass base as a straight edge draw your line.

Repeat the exercise using another point which you can identify (Red Bay). You are located at the intersection of the two lines.

Ray Henderson