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Marine Corps MOS · Combat & Infantry

0861 Fire Support Marine

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

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Overview

A Fire Support Marine plans, calls for, integrates, coordinates, observes, and adjusts artillery, missile, rocket, naval surface, and air to surface fires. The Marine operates laser designators, range finders, communications equipment, radio networks, and Marine Corps fire support systems while coordinating lethal and nonlethal fires.

Minimum clearance: Secret

Minimum ASVAB: CL 100 or GT 100

ASVAB policy: Not policy-reviewed · coverage unknown · as of 2026-10-19

Program scope has not been reviewed.

Policy applicability and coverage of the program's score routes have not been reviewed. Shown-route arithmetic is not an eligibility decision.

Source: navmc-1200-1l-fy26 (source date 2025-03). Policy applicability has not been established.

See if you would hit this score: free ASVAB practice test

Core Skills

  • Laser designator and range finder operation
  • Voice and digital radio network establishment
  • Artillery and naval gunfire integration

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

Radio, Cellular, and Tower Equipment Installers and Repairers

Operating communications equipment and establishing voice and digital radio networks provide an operational foundation for learning civilian radio installation and testing.

How to prepare: Complete hands-on radio installation training covering antennas, coaxial cabling, grounding, and transmission testing to move from equipment operation into installation and repair.

What the civilian work involves
  • Run appropriate power, ground, or coaxial cables.
  • Test operation of tower transmission components, using sweep testing tools or software.
  • Install all necessary transmission equipment components, including antennas or antenna mounts, surge arrestors, transmission lines, connectors, or tower-mounted amplifiers (TMAs).

Surveying and Mapping Technicians

Range finder operation and observation of artillery and naval gunfire provide a starting point for field surveying work involving instrument-based distance measurement.

How to prepare: Take an introductory field surveying course with practical exercises in measuring angles, distances, and elevations before applying for survey crew assistant positions.

What the civilian work involves
  • Position and hold the vertical rods, or targets, that theodolite operators use for sighting to measure angles, distances, and elevations.

Training & Development

Choose credentials for your target role. COOL funding markers describe program listings, not a guarantee of eligibility or funding.

Getting Started

  • Associate Electronics Technician (CETa)

    Build foundational knowledge of circuits, test equipment, and telecommunications before progressing into radio installation and repair.

    Eligibility and preparation: Pass the CETa examination with a score of at least 75%; the hands-on component is optional.

    For: Radio, Cellular, and Tower Equipment Installers and Repairers

Notes & Sources

Evidence for this guidance (4 documents)
  1. NAVMC 1200.1L (FY26, in force): MOS 0861

    [1] MOS 0861 section "a. Summary"; cached text line 31239; NAVMC 1200.1L signed 2025-03-07, in force until 2026-10-01

    Supports: Laser designator and range finder operation, Voice and digital radio network establishment, Artillery and naval gunfire integration, Radio, Cellular, and Tower Equipment Installers and Repairers (O*NET 49-2021.00), Surveying and Mapping Technicians (O*NET 17-3031.00)

  2. O*NET: Radio, Cellular, and Tower Equipment Installers and Repairers

    [2] O*NET 30.3 occupational data

    Supports: Radio, Cellular, and Tower Equipment Installers and Repairers (O*NET 49-2021.00)

  3. O*NET: Surveying and Mapping Technicians

    [3] O*NET 30.3 occupational data

    Supports: Surveying and Mapping Technicians (O*NET 17-3031.00)

  4. COOL credential mapping: Associate Electronics Technician (CETa)

    [4] 0861 cached COOL credential feed

    Supports: Associate Electronics Technician (CETa)

    [5]ETA International: Associate Certified Electronics Technician · CETa description and CETa Exam Info; retrieved 2026-09-23

    Supports: Associate Electronics Technician (CETa)

Defense contractor jobs for 0861

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

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