ready service ammunition is kept in the upper handling room just below the mount. The projectile travels up to the gun room (also called the gun house) through an electric-hydraulic hoist. It arrives next to the projectile-man nose down and waist high. If the projectile has a time fuze, the fuze is automatically set as it goes up the hoist, and the hoist maintains the ordered fuze setting from the fire control system as long as the projectile stays in the hoist. The powder case is sent up through a powder scuttle in the gun room's deck just next to the powder man's feet. It arrives with its base up, and the primer covered with a protector called the "Butterfly". The men in the upper handling room hand carry the projectiles and powder cases from the ready service racks to the lower ends of the hoists while avoiding the equipment hanging down from the rotating mount. In a twin mount executing "Rapid continuous fire" (the firing keys are held closed, and the gun fires as soon as the breech closes), the crew move 30 to 44 projectiles and powder cases per minute. Pedestal mounts The ready service ammunition is kept in lockers or compartments arrayed around the mount. The projectiles and powder cases are hand carried from ready service to the left side of the moving mount. The projectile is placed nose down in one of three Fuze Setter Mechanisms (commonly called fuze pots) on the mount. If the man is delivering a projectile with a mechanical time fuze, he then spins a hand crank just in front of that fuze setter mechanism. This would dial in the ordered fuze time into that projectile. The powder case is placed in a rack bolted to the mount's deck just behind the powder-man's feet. Mount crew Depending on the mount, a 5"/38 caliber gun could have a crew of 15 to 27 personnel in the gun room and upper handling room. This does not include the personnel needed in the magazines during extended actions. There were two modes of mount operation that the crew was trained and expected to know. The primary mode was "automatic control", where the mount was slaved to the fire control system. But if the fire control system was damaged, or if the ship's power was out; the mount could continue the action in "local control". In US