MOS Definitions

13B Cannon Crewmember

     A Cannon Crewmember is an important part of the Army's success on the battlefield. Artillery teams are used to support infantry and tank units in combat, but also have responsibilities during peacetime. Cannon Crewmembers work on cannons known as 'howitzers,' a heavy artillery machine piece with single-barrel firing capability.

Duties performed by this MOS include:
Integral member of a crew that operates high technology cannon artillery weapon systems. Loads and fires howitzers. Sets fuse and charge on a variety of munitions, including high explosive artillery rounds, laser guided projectiles, scatterable mines, and rocket assisted projectiles. Uses computer generated fire direction data to set elevation of cannon tube for loading and firing. Employs rifles, machine guns, and grenade and rocket launchers in offensive and defensive operations. Drives and operates heavy and light wheeled trucks and tracked vehicles. Transports and manages artillery ammunition. Participates in reconnaissance operations to include security operations and position preparation. Operates in reduced visibility environments with infrared and starlight enhanc ing night vision devices and other equipment. Coordinates move ment into position. Camouflages position area. Communicates using voice and digital wire and radio equipment. Uses critical combat survival skills to operate in a hostile environment. Maintains opera tional readiness of vehicles and equipment.Supervises handling, transportation, accountability, and distribution of ammunition. Assists section chief in supervision of howitzer operations, maintenance, and training. Lays weapon for direction, conducts bore sighting and basic periodic tests. Supervises the operation, loading, and maintenance of the Field Artillery Ammunition Support Vehicle.
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13D FA Automated Data Systems Specialist

     A Field Artillery Automated Tactical Data Systems Specialist (FAATDS) is an important member of the Army's field artillery team. FAATDS Specialists are primarily responsible for operating the Advanced Field Artillery Tactical Data Systems for both Cannon and Multiple Launch Rocket Systems (MLRS). Field Artillery Automated Tactical Data Systems Specialists play a critical role in the safe, accurate, and lethal delivery of the Field Artillery's various fire support systems. Both cannon and MLRS systems are used to support infantry and tank units in combat.

Duties performed by this MOS include:
Establishes, maintains and operates communications systems. Assists in preparation of computer center for operation and shutdown. Prepares field artillery tactical data systems for operation to include cabling, installation, and removal procedures. Inputs initialization data and data base information to field artillery tactical data systems. Maintain fire capabilities maps and charts. Operates and performs operator maintenance on field artillery tactical data systems equipment, section vehicles and generators associated with field artillery tactical data systems. Performs crew maintenance and participates in organizational maintenance of section equipment.

Assists field artillery tactical data systems noncommissioned officer in supervision of all fire control operations in multiple launch rocket system platoon fire direction center. Operates field artillery tactical data systems at multiple launch rocket system battery and battalion, cannon battalion and higher echelons. Performs computer operations including fire mission processing, fire plan schedules and data base construction. Initiates computer center operations, including establishing control information, communications with digital subscribers and data base initialization. Performs operator, crew and organizational maintenance on section equipment.
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13F Fire Support Specialist

     A fire support specialist serves with the Army's field artillery team. Artillery Soldiers use weapons that fire large rounds, rockets or missiles to support infantry and tank units in combat. The fire support specialist leads, supervises or serves in intelligence activities such as target processing for artillery units and maneuver brigades.

Duties performed by this MOS include:

  • Lead and train the forward observer team and combat observation lasing technician in combat operations.
  • Prepare observer target lists and assist in formulating offensive and defensive fire support plans.
  • Initiate requests and adjust field artillery, mortar and naval gunfire using all methods of adjustment including continuous and coordinated illumination.
  • Initiate suppressive and screening fire to support scheme of maneuver and perform crater analysis.
  • Select and occupy observation post. Orient map and prepare terrain sketch and visibility diagram.

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13M MLRS Crewmember

     A Multiple Launch Rocket System (MLRS) crew member plays an important part of the Army's combat team. MLRS teams support infantry and tank units and supplement cannon artillery in combat. The MLRS launches various missiles in quick strikes during combat. The crewmembers operate and maintain the entire MLRS system.

Duties performed by this MOS include:

  • Make manual fire control entries and enter meteorological data into the fire control system.
  • Fire weapon on command
  • Perform fire control system diagnostic test using built-in test equipment
  • Prepare launcher-loader module for reload and performs maintenance operations
  • Conduct reconnaissance to determine routes and precise firing location sites.

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13P MLRS Fire Direction Specialist

     A Multiple Launch Rocket System (MLRS) Automated Tactical Data Systems specialist supports infantry and tank units while supplementing cannon artillery in combat. The MLRS launches various missiles in quick strikes during combat. This specialist records and transmits the firing data for the MLRS.

Duties performed by this MOS include:

  • Record and transmit firing data using the fire direction system and voice radio
  • Operate fire direction systems, Platoon Leaders Digital Message Device and MLRS communications equipment
  • Participate in gathering of operations and intelligence data
  • Plot using fire capability charts and friendly and enemy situation maps
  • Record ammunition expenditure, equipment serviceability, situation, firing point, target and mission reports
  • Drive section vehicles and perform operator/crew maintenance on section vehicles, generators and equipment
  • Aid in collection and transmission of data
  • Install, maintain and operate radio wire communications, digital communications devices and secure voice equipment
  • Assist in leading and directing fire direction personnel
  • Lead other Soldiers in MLRS platoon fire direction center
  • Plot information using firing capabilities chart, friendly and enemy situation maps
  • Operate fire direction systems, platoon leaders digital message device, and MLRS communications equipment. Converts fire orders to fire command

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13R FA Weapon Locating Radar Operator

     The weapon locating radar operator is crucial to the Army’s Field Artillery radar team. Weapon locating radars use radio frequencies at the speed of light to detect artillery, rockets and mortars. The WLR operator uses the radar to detect enemy indirect weapons systems by following the track of their artillery rounds. The radar operator then transmits the data to a fire direction center for clearance of fires. The center sends targeting data to artillery batteries to destroy those weapons in a timely manner. The radar operator adds to force protection as the “radar eyes” of a brigade combat team.

The radar operator provides gun registration for firing batteries utilizing six buffers for six artillery pieces firing one round at a time tracking on the descending leg of the trajectory for verification normally performed during peacetime operations.

Duties performed by these radar operators include:

  • Emplaces and displaces the radar and ancillary equipment
  • Initializes and operates all radar and ancillary equipment
  • Determines and corrects the altitudes of weapon locations from a contour map, when required
  • Transmits the point of origin to the counterfire operations section or as directed
  • Maintains record of transmitted locations
  • Operates and performs maintenance on the radar's prime movers
  • Performs unit maintenance using built-in-test/built-in-test-equipment, fault detection and isolation
  • Isolates failures to a line replaceable unit or shop replaceable unit that can be replaced by a crewmember
  • Provides local security



13T FA Surveyor/Meteorological Crewmember

     The field artillery surveyor/meteorological crewmembers monitor weather conditions so the field artillery team can fire cannon and launch missiles accurately. Their role is crucial in the support of infantry and tank units during combat.

Duties performed by this MOS include:

  • Operate meteorological, peripheral and computer equipment
  • Perform astronomic observations
  • Prepare meteorological balloons for launching
  • Develop meteorology data, record field data, prepare schematic sketches and mark survey stations
  • Perform maintenance on vehicles, radios, weapons and all survey equipment

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