Low clouds, thick fog surface water, and rain degrade the effectiveness of VT fuzes M513 and M514. Fuzes M728 and M732 are not affected. All phases of target analysis are conducted within constraints established by the commander. On the basis of ammunition constraints, a commander will stipulate the type of effects he desires against specific target categories. The three target effects categories are discussed below.
Smoke is used to screen or obscure.
The effect of suppressive fires usually lasts only as long as the fires are continued. Suppressive fires can be delivered by small delivery units and require a low expenditure of ammunition. Experience has shown that 10 percent or more casualties will neutralize a unit. Neutralization fires are delivered against targets located by accurate map inspection, by indirect fire adjustment, or by a target acquisition device. The assets required to neutralize a target vary according to the type and size of the target and the weapon-ammunition combination used.