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

FM 3-22.1(3) Place the TOW elevation lever in the MANUAL mode.(4) (Helper) insert the boresight telescope into the alignment hole between the TOWlauncher bores.(5) Press the TOW button.(6) Check that the TOW indicator light goes out when the self-test finishes.(7) Ensure that "TOW" appears on the status indicator.(8) (Helper) align the boresight reticle with the TOW cross on the panel.(a) Tell gunner to traverse to align the boresight AZ crosshair (vertical) with thevertical line of the TOW cross.(b) Tell gunner to elevate or depress to align the boresight EL crosshair (horizontal)with the level line of the TOW cross.(9) Align the TOW reticle EL crosshair (horizontal) with the level line on the ISUcross of the panel using the TOW boresight screw.(10) Traverse to align the TOW reticle with the ISU cross on the panel (Figure B-50).(11) Determine launcher alignment error.(a) Observe the aiming point of the boresight reticle on the TOW cross of the panel.(b) Estimate distance (mils) between the boresight reticle and TOW cross using the2-mil circle of the boresight reticle.(12) Adjust the launcher if the error is more than 1 mil.Figure B-49. ISU reticle aligned with "T."Figure B-50. Alignment of TOW cross and 2-mil circle.B-19. BACKLASH TESTWhen the direction of gun elevation is reversed, such as when the gun is depressed afterbeing elevated, the sight may not immediately move with the gun. This slack between thesight and gun is called backlash. Backlash is controlled during boresighting by using agun-lay ending in elevation. To prevent gunnery errors due to backlash, gunners shouldB-36