Measuring Direction

Spread the dividers and place the tips on the courseline. If they will reach, place the

tips of the dividers on the two points (Figure 4.2-18).

Place the straightedge of the plotter against the two points of the dividers (Figure

4.2-18).

While keeping the straightedge against the dividers' points, slide the plotter along

the course line until the plotter's grommet is over a meridian (Figure 4.2-18).

NOTE: Greatest accuracy can be obtained by using a meridian exactly halfway

along your course, but using nearby meridians for convenience will still provide

satisfactory results.

In conclusion, go to the outer two scales and note where the meridian (the one

under the grommet) intersects the scales. There will be a choice of two answers,

choose the one that is nearest the estimate. Be sure to count the marks carefully

and remember the scale increases in a counterclockwise direction (Figure 4.2-18).

4.6-36