Muzzle velocity
The guns were mounted in DrL C/11 turrets, which were electrically controlled, though the guns were elevated hydraulically. Each turret had a working chamber beneath it that was connected to a set of revolving ammunition hoists leading down to the magazine below it. One set of hoists retrieved the shells and propellant charges from the magazines and brought them to the working chamber, and another transferred them up to the gun house through flash-tight doors; this arrangement was adopted to reduce the risk of fire in the gun house from reaching the magazines. In an effort to reduce the possibility of a fire, everything in the turret was constructed of steel. The guns had a range of elevation from -8 to 15.5 degrees, which provided a maximum range of . Later in their careers, their mounts were modified to increase maximum elevation at the expense of depression, with the range now -5.5 to 16.5 degrees, increasing their range to . Muzzle velocity was .