USS Alabama's 16-inch Gun Turret
USS Alabama's Turret number 3 and its three 16"/45 caliber Mark 6 guns. Each gun is 736 inches long, and could fire two rounds per minute. Each projectile weighed up to 2,700 pounds, and required 540 pounds of black gunpowder (six 90 pound bags) for each shot. It took 140 men to man each of the gun turrets, which were 5 levels deep on the ship.