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

FM 3-22.1Figure B-11. Preparations before screening equipment.b. Testing Area. Conduct testing close to where the boresight equipment is stored orsecured. This facilitates movement of equipment to and from the test vehicle. You willneed a 52-meter line of sight from the end of the 25-mm gun barrel to the test panel. Youcan stow testing materials and equipment in the test vehicle overnight. This makes setupeasier at the beginning of each day.c. Boresight Test Panel. Use a special test panel to test the equipment. The panel isa scoring grid of 2-inch squares. Figure B-12 shows an example panel. Your local TSCmust produce the actual-size drawing. With the panel 52 meters from the end of the25-mm gun barrel, each 2-inch square of the scoring grid, as seen through the boresighttelescope, measures 1 mil high and wide. This grid allows the tester to observe thelocation of the boresight aiming point. The tester then records the aiming point onthe scoresheet.Figure B-12. Example boresight test panel.(1) The test panel has a white background. Solid 1/8-inch-wide black lines marksquares on the panel. The length of each side of a square is 2 inches (5 centimeters).Numbers measure 1 1/2 to 2 inches tall.(2) If you waterproof the drawing like a map, you can staple it to a piece of plywoodand use it as a test panel. Lean it against a fence or any other rigid structure for support.To keep the wind from knocking it down, tie the panel to the support structure in theupright position. Be sure to locate the panel 52 meters from the 25-mm gun. It need notsit at gun level.B-10