recheck your work to find the error. Do not assume that

rotate the straightedge until the unknown point is sighted

the position is at the center of the triangle.

along the edge.

4. Draw a line along the straightedge.

5. Repeat the above procedures at Point B, and for

steps to locate an unknown point using the straightedge

a check on accuracy, at a third position.

method of intersection. (See fig. 5-37.)

6. The intersection of the lines is the location of

1. Orient the map on a flat surface by the inspection

unknown Point C.

method.

2. Locate and mark your position on the map.

3. Lay a straightedge on the map and place one end

Locating the unknown position of the user by

at the position of the user (Point A) as a pivot point. Then

sighting on two or three known features is called

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