Before revision: The Integrated Helmet and Display Sight System (IHADSS) 300px|30 mm M230 chain gun turret on a Boeing AH-64 Apache being aimed with a helmet-mounted sight.
After revision: 300px|The Integrated Helmet and Display Sight System (IHADSS) 300px|30 mm M230 chain gun turret on a Boeing AH-64 Apache being aimed with a helmet-mounted sight.