radial line points of intersection with 18-kilometer arc.

(7) Darken perimeter of fallout zones with a grease pencil. Label the zones. Zone I is the area inclosed by

semicircle C, the tangent lines, and the 18-kilometer arc. Zone II is the area inclosed by the 18 and 36-kilometer arcs and

the radial lines.

(8) Estimate the fallout time-of-arrival distance for 1 hour after burst to be 16 kilometers (effective windspeed

times the hour of interest). Draw a dashed arc between the radial lines at a distance of 16 kilometers. Label the arc as H

+ 1. Draw a dashed arc between the radial lines at a distance of 32 kilometers. Label the arc as H + 2.

(9) Place the area predictor on the operations map so that GZ on the predictor is over GZ (MN553298) on the

map. Rotate the predictor until the GN line is pointing toward grid north on the map. The predictor is now oriented for a

downwind direction of 90 degrees. Evaluate the effect of potential fallout on unit operations in the predicted area.