838 - CHIEF ORDNANCEMAN, HEAVY ANTIAIRCRAFT FIRE CONTROL
[CHF ORDMAN, HVY AA FC]

Performs various supervisory and technical duties incident to the inspection, testing, maintenance, and repair of all types of heavy antiaircraft fire control equipment including the M7 and M9 directors, and generators, cables, remote control systems, and height finders.

839 - ARTILLERY MECHANIC   
[ARTY MECH]

Inspects, tests, maintains, and repairs all types of artillery including: 75mm, 105mm, and 155mm howitzers; 155mm guns; 37mm antitank guns, 90mm, 40mm, and 20mm antiaircraft guns.

848 - PARTS CLERK, ORDNANCE  
[PARTS CLK, ORD]

Receives, stores, and issues spare parts, tools, and group assemblies of small arms, artillery, fire control equipment, and other ordnance materiel.

901 - MUNITIONS WORKER  
[MUN WORKER]

Performs various tasks in connection with the storage and issue of all types of munitions.

907 - TURRET ARMORER, TANK AND AMPHIBIAN TRACTOR  
[TURRET ARMR, TK & AMPHTRAC]

Inspects, tests, adjusts, services, and repairs weapons, gun mounts, traversing mechanisms, gyro stabilizers, and fire control equipment mounted in tank and armored amphibian tractor turrets.

913 - FIELD ARTILLERY MECHANIC   
[FA MECH]

Inspects, tests, maintains, and repairs light and heavy artillery pieces such as 155mm guns, 37mm antitank guns, and 75mm, 105mm, and 155mm howitzers.

915 - ANTIAIRCRAFT ARTILLERY MECHANIC   
[AA ARTY MECH]

Inspects, tests, maintains, and repairs light and heavy antiaircraft artillery such as 90mm, 40mm, and 20mm antiaircraft guns.

917 - HEAVY ANTIAIRCRAFT DIRECTOR TECHNICIAN (Designated Director)
[HVY AA DIRECTOR TECH (***)]

Performs electrical and mechanical repairs to fire control directors, such as the M7 or M9, used with heavy antiaircraft artillery (e.g., the 90mm) ; replaces worn or broken parts; makes precision adjustments to internal mechanisms.