a twin mount, he and his Fuze Indicator Regulator sit next to the Sight Setter between the guns. When the mount is put in Automatic control, he flips the selector lever to Auto, and this electrically powered Fuze Indicator Regulator automatically follows the fuze setting orders sent from the Fire Control System by synchro. In Local Control, he follows the Mount Captain's fuze orders by spinning the hand crank until the dials in the window read the correct fuze time. Powder-man Slides the primer protector off the powder case, and then lifts the case from the powder scuttle at his feet to the gun's rammer tray. Projectile-man Moves the projectile from the hoist to the rammer tray in front of the just-placed powder case, and then he pulls the rammer lever to load the projectile and powder case into the chamber. Hot case man When the gun fires, he catches the ejected powder case and throws it out of the mount. Check sight He verifies that the mount is aiming at the target. Ammunition This gun uses semi-fixed ammunition. (Pictured) (Also called Separated Ammunition.) Each round consists of a projectile and a powder case. The two parts of the round are kept separate until they get to the gun. At the gun, they are first combined on the rammer tray, and then power rammed into the chamber together with one ram cycle. The powder case completely fills the volume of the chamber, and its length seats the projectile's rotating band into the bore's rifling. This is different from a naval bag gun. In a bag gun: (1) The projectile, by itself, is power rammed into the chamber until its rotating band is seated in the bore's rifling. (2) The rammer is retracted. (3) The powder bags are then rammed in. This is also different from some artillery field guns: (1) The projectile is hand rammed into the chamber with a ramrod until its rotating band is seated in the bore's rifling. (2) The ramrod is retracted. (3) Next powder is placed in the chamber either as a bag or primed canister with the required charge. Note that the single ram operation used in semi-fixed guns decreases the loading time, and therefore increases the firing rate on medium and large caliber guns. For example, each of the nine 8"(203 mm)/55 caliber Rapid-Fire guns installed on the used auto-loaded semi-fixed ammunition and