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

FM 3-22.1 (23-1)APPENDIX BBoresightingThis appendix discusses boresighting procedures. Before zeroing, thecrew boresights all weapon systems to ensure they align correctly. As areminder--• Boresighting aligns the sight with the aim point.• Zeroing aligns the sight with the impact point.Section I. THEORY AND PRACTICEBoresighting aligns the ISU OR IBAS and weapon systems to a common point of aimand simplifies the task of zeroing the turret weapon systems (Figure B-1, page B-2). Thecrew must ensure that boresight kits meet the accuracy standards in this appendix beforeusing them to boresight the weapon systems. They must turn in to battalion maintenanceany kits that fail the accuracy test. They perform accuracy tests during semiannualservicing of vehicles, or whenever they detect problems during zeroing. They can swaptelescopes and adapters to form complete kits that meet the standards, if needed. Specificboresighting instructions follow:B-1. VISIBILITY CONDITIONSDuring good visibility, boresight the gun’s daysight using the convenient-target method.During limited visibility, for all but the A3, use the buddy method to boresight thedaysight (TMs 9-2350-252-10-2 and 9-2350-284-10-2). Only after completing this stepcan you boresight the thermal sight to the daysight. Before boresighting, reset theboresight knobs to zero.B-2. RESTRICTED AREASFor restricted or confined areas, such as a motor pool, use the close-in boresight panel toboresight the turret weapons. In such areas, you can boresight the Bradley A3 sights to apoint of aim as near as 200 meters.B-3. PREPARATIONSelect the boresight mode from the menu on the CTD. The boresight menu takes youstep-by-step through aligning the IBAS, the CIV, and the backup sight’s LOS to theweapon systems. Before entering the boresight mode on the CTD, ensure the vehicle isstationary and level. Adjust the IBAS and CIV (brightness, contrast, focus, and polarity),then collimate IAW TM 9-2350-294-10-2-1.B-1