Marine Corps Enlisted Job Descriptions (MOS) 0811

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In combat situations, Marines use different weapons to defend against and attack the enemy. One of the most effective ones the U.S. military uses is the howitzer, a type of artillery weapon that can double as a field gun or a cannon, and can produce direct and indirect fire. 

Such a weapon needs more than one operator, since a howitzer has a high muzzle velocity and long barrel. There are several members of a field artillery howitzer battery, and one of the most important is the field artillery cannoneer.

It's Marine military occupational specialty (MOS) 0811.

Duties of the Field Artillery Cannoneer

Field artillery cannoneer is an entry-level MOS. The basic skills needed include the ability to operate and maintain artillery equipment, basic technical and math skills for computing, communicating and executing commands; the ability to work closely with others in a field environment and performing technical skills as needed.

As a member of a field artillery howitzer battery, cannoneers prepare artillery pieces and equipment for movement, combat, and firing. They inspect and prepare ammunition for firing, and prepare the weapon for firing, including laying for elevation and deflection, loading the piece, and handling ammunition. 

In addition to their combat duties, field artillery cannoneers perform preventive maintenance on the howitzer and clean artillery pieces and equipment. They make routine tests and authorize repairs to equipment.

They also work to ensure their position is camouflaged, and protect the weapons and other equipment from chemical warfare agents. And they're also tasked with constructing field fortifications.

Job Qualifications for MOS 0811

In order to qualify as a field artillery cannoneer, Marines need a general technical (GT) score of 90 or above on the Armed Services Vocational Aptitude Battery (ASVAB).

Once they've completed their basic training, they'll complete the USMC cannon crewman course and demonstrate their qualification through performance, or complete the appropriate MCI courses. In the second scenario, recruits will demonstrate their qualification through on-the-job training.

Related Marine Corps Jobs

A related but different job to the field artillery cannoneer is MOS 0814, the high mobility artillery rocket system (HIMARS) operator. Like their counterparts in MOS 0811, these operators prepare the HIMARS for movement, combat, and firing. They inspect and prepare the launcher system for employment to include movement to and from concealment. positions and firing positions, operate the fire control systems, and handle the multiple launch rocket system family of munitions.

In addition, HIMARS operators perform preventative maintenance and clean the weapon's components. They make routine tests and authorized repairs to HIMARS, and provide security, ensure battery positions are camouflaged, as well as protect HIMARS from chemical warfare agents. 

For a complete listing of duties and tasks, refer to MCO 3501.26A, Artillery Unit Training and Readiness (T and R) Manual.

Related Department of Labor Occupation Codes 

(1) Field Artillery Crewmember 378.684-018.

(2) Field Artillery Senior Sergeant 378.132-010.

Above information derived from MCBUL 1200, parts 2 and 3