U.S. Army soldiers from Alpha Battery, 4th Battalion, 320th Field Artillery Regiment, 4th Brigade Combat Team, 101st Airborne Division punch in coordinates on the gunners display unit to calibrate the M-119 105 mm howitzer during operation Toccoa Takarah 3, Dec. 27, 2010. The gunners display unit is used to coordinate with the fire direction center to give the cannon the correct grid coordinates to fire on.