2003 US Army BRADLEY GUNNERY 503p.pdf - Survival Books

FM 3-22.1Figure 6-10. Range determination using binoculars.(4) ISU. The BC and the gunner can use the horizontal ranging stadia or reticle leadlinemethod. Using his sight extension limits the BC's field of view. A3 only: However, ifhe selects the horizontal ranging stadia, he can use those through the RBD.(5) Laser Range Finder, AN/GVS-5. Using the laser range finder, the BC canquickly and accurately determine the range for the gunner. The AN/GVS-5 is not organicto an infantry company but is organic to the scout platoon.(6) Eye-Safe Laser Range Finder. The ELRF allows the commander or gunner todetermine, rapidly and accurately, the target range. The ELRF displays range in 5-meterincrements from 190 to 9,990 meters, plus or minus 10 meters.c. Gunner. The gunner can determine range using any of the following methods:(1) Choke Sight. He only uses the ISU reticle lead lines (Figure 6-11A, page 6-17)and horizontal ranging stadia (Figure 6-11B, page 6-17) to determine range from adefensive position. The ISU reticle has a choke sight he can use to estimate the range toBMP-type target, that is, any target that measures 1.8-meters high. (Reticles do not showthe ADR for the M2A2 or M3A2.) Many different kinds of vehicles around the worldderive from the BMP. The gunner can use the ISU or IBAS ranging stadia to determinethe correct range to any of these (Figure 6-12, page 6-18).(a) To use the choke sight, he moves the turret until the ranging stadia line appears totouch the vehicle. He aligns the horizontal line with the bottom of the target vehicle'strack. He moves the turret horizontally along the target until the top of the hull appears totouch the stadia line. He reads the range where the top of the hull touches the angledstadia line. If the hull touches the line between the tick marks, he estimates the range,then indexes it into the ISU. Then, he re-lays the reticle on the target.6-14