Abstract: An artillery piece having a gun which is aligned on a target from a director remote from the artillery piece by first measuring, at the director, the angle formed between a line through the director with the target and a line from the director through the artillery piece, and communicating this director angle to the artillery piece. Then at the artillery piece, the angle is measured that is formed between the gun barrel and a line from the piece through the director. These two angles are added together and the gun is pivoted through an angle equal to the sum thus derived. The director angle is sighted backward away from the target. In addition the piece has a periscope and the director angle is sighted to the periscope and the tank angle is sighted from the periscope, which is an offset from the upright gun-pivot axis.