ATP-3-09-30 Observed Fires Download
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Chapter 6 6-30 ATP 3-09.30 28 September 2017 6-128. If the smoke is ineffective, the observer must decide whether to shift the smoke or to fire HE. If the decision is to shift, there may be a break in the screen while new data is computed. ADJUSTMENT 6-129. Adjustment may be required to bring the desired effects on to the target. Observers need to judge wind speed and direction in the target area to make corrections. The minimum corrections are 50 meters for deviation and 100 meters for range. The HOB of shell smoke (M116A1) can be adjusted for— Ground burst: UP 100. Canisters bouncing excessively: UP 50. Canisters too spread out: DOWN 50. Shell Smoke (HC) 6-130. Use HE in adjustment until a 200 meter bracket is split. The observer then requests shell smoke. Fire one smoke round, and make any necessary corrections. Then request fire for effect. Shell WP 6-131. This adjustment is conducted like an adjust fire mission with WP in effect. Use HE during the adjustment. The observer may fire a WP round after adjusting with HE in order to verify wind condition and smoke placement prior to firing WP in effect. Improved Smoke (M825) 6-132. This is the predominant 155-mm smoke round. Adjust M825 smoke in the same manner as HC smoke. However, M825 improved smoke rarely requires HOB corrections. If the observer spots the M825 as graze, immediately announce “graze” to the FDC. The FDC must then verify the firing data was correct. The HOB of M825 can be adjusted by; Graze burst with correct firing data: UP 100 Thick, dense separated clouds: UP 50 Thin, uneven clouds; DOWN 50 EXAMPLE MISSIONS 6-133. The examples below portray various types of smoke missions.