Marine Corps
The U.S. Marine Corps begins by separating all jobs into "occupational fields" (OccFld), in which no distinction is made between officers and enlisted Marines. The fields are numbered from 01 to 99 and include general categories (Intelligence, Infantry, Logistics, Public Affairs, Ordnance, etc.) that specific jobs fall under.
Each field contains multiple MOS's, each designated by a four-digit numerical indicator and a job title. For example, the infantry field (03) has ten enlisted classifications: Rifleman (MOS 0311), Riverine Assault Craft (MOS 0312), Light Armored Vehicle Crewman (MOS 0313), Scout Sniper (MOS 0317), Reconnaissance Man (MOS 0321), Machine Gunner (MOS 0331), Mortarman (MOS 0341), Assaultman (MOS 0351), Antitank Assault Guided Missileman (MOS 0352), and Infantry Unit Leader (MOS 0369).
Each of the jobs have authorized ranks associated with them. For example, anyone ranking from Private to Sergeant can be a Rifleman (0311), but only Marines ranking from Staff Sergeant to Master Gunnery Sergeant can be an Infantry Unit Leader (0369).
Duties and tasks are identified by rank because the Marine Corps MOS system is designed around the belief that increased duties and tasks accompany promotions. The first two digits designate the field and, the last two digits identify the promotional channel and specialty.
For example, the MOS 0311 indicates that it is in Occupational Field 03 (Infantry) and designates the "Rifleman" (11) MOS. For warrant officers, the MOS 2305 indicates that it is in Occupational Field 23 (Ammunition and Explosive Ordnance Disposal) and designates the "Explosive Ordnance Disposal Officer" (05) MOS. For officers, the MOS 0802 indicates that it is in Occupational Field 08 (Field Artillery) and designates the "Field Artillery Officer" (02) MOS.
Read more about this topic: United States Military Occupation Code
Famous quotes containing the words marine and/or corps:
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—Voltaire [François Marie Arouet] (1694–1778)