· Fill map with additional true
north-south lines, spaced
approximately 1 inch apart,
parallel to map's margin
(figure 19).
5. On the map, mark a start position
with a "point" and a destination
with an "X".
6. Draw a line connecting both
marks.
7. Remove the rubber shoe and
open both covers to 180°.
8. With both covers pointing to the
"X", place clear base next to the
line (figure 20).
Figure 19
Figure 20
11