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Coordinates are determined using the North/South and

East/West lines on a map (grid lines). Positions are

determined on a map by intersecting coordinates. The lower

left is the origin and coordinates are read to the right and then

up. (see fig. 5)

The position of "X" is read 04-24. Read the number from the

left to the right, then from the bottom to the top. For greater

accuracy, each of the boxes created by the grid lines can be

divided into 10 imaginary lines in both directions. Since the

position of "X" is not directly on one of the grid line

intersections, repeat the steps explained above with these

imaginary lines. The position of "X" would then be read

045-245.

(FIGURE 5)