a. Measure the angle formed by the radial lines drawn from ground zero

to the cloud-top height and two-thirds stem height points on the

fallout vector plot (or the radial lines which have been expanded to

include vectors between the two-thirds stem height and the cloud-top

height). If the angle formed is 40 degrees or greater, proceed as

outlined in Step 8.b. If the angle formed is less than 40 degrees,

bisect the angle and expand the angle formed by the two radial lines

to 40 degrees, 20 degrees on each side of the bisector, (Figure

3-7).

b. Measure the azimuths, in mils or degrees from grid north, of the

final left and right radial lines and record on **lines p and q **of the

worksheet (use four digits).

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