Figure 3-3 shows the effects of precipitation on a slope. Based on the type of
soil drainage, and amount of rainfall, conditions may be degraded to SLO-GO or NO-
GO. This overlay can be used to show areas of high concentration of chemical
agents.
Figure 3-4. Cloud Cover Weather with Canopy Closure Overlay.
Figure 3-4 shows cloud cover at low levels will have a
significant effect on low-
level attack helicopter operations as well as chemical
and biological agents. It
will affect airborne-type surveillance systems. Close
air support and interdiction
operations will be impaired. Clouds have an effect on
the temperature gradients
and therefore on the use of chemical agents.
3-9
IT 0462
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