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Navy NEC · Engineering

779B 25mm Machine Gun System (MGS) MK 38 MOD Gun Weapon System (GWS) Technician

Current service use not established

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

A Navy Enlisted Classification: a skill designation sailors hold in addition to their rating.

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Overview

A MK 38 MOD Gun Weapon System Technician operates and maintains the 25mm Machine Gun System. The technician performs preventive maintenance, detects failures, and isolates faults with Built-In-Test equipment at the organizational level.

Core Skills

  • Fault isolation using built-in test equipment
  • Organizational-level gun system preventive maintenance

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.

Electrical and Electronic Engineering Technologists and Technicians

MK 38 failure detection and fault isolation using built-in test equipment transfer to equipment diagnostics and electronic systems maintenance.

How to prepare: Take a hands-on electronics course covering schematic reading and standard test equipment to extend your experience beyond system-specific built-in tests.

What the civilian work involves
  • Modify, maintain, or repair electronics equipment or systems to ensure proper functioning.
  • Set up and operate specialized or standard test equipment to diagnose, test, or analyze the performance of electronic components, assemblies, or systems.
  • Identify and resolve equipment malfunctions, working with manufacturers or field representatives as necessary to procure replacement parts.

Maintenance and Repair Workers, General

MK 38 preventive maintenance, failure detection, and fault isolation overlap with routine equipment upkeep and malfunction diagnosis.

How to prepare: Seek supervised machinery-maintenance practice inspecting drives, motors, and belts to broaden your equipment experience beyond the MK 38.

What the civilian work involves
  • Perform routine maintenance, such as inspecting drives, motors, or belts, checking fluid levels, replacing filters, or doing other preventive maintenance actions.
  • Inspect, operate, or test machinery or equipment to diagnose machine malfunctions.

Notes & Sources

Evidence for this guidance (3 documents)
  1. NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC 779B

    [1] NEC entry "779B - 25mm Machine Gun System (MGS) MK 38 MOD Gun Weapon System (GWS) Technician"; cached text line 18687; NAVPERS 18068F Vol II, 2026-07 edition

    Supports: Fault isolation using built-in test equipment, Organizational-level gun system preventive maintenance, Electrical and Electronic Engineering Technologists and Technicians (O*NET 17-3023.00), Maintenance and Repair Workers, General (O*NET 49-9071.00)

  2. O*NET: Electrical and Electronic Engineering Technologists and Technicians

    [2] O*NET 30.3 occupational data

    Supports: Electrical and Electronic Engineering Technologists and Technicians (O*NET 17-3023.00)

  3. O*NET: Maintenance and Repair Workers, General

    [3] O*NET 30.3 occupational data

    Supports: Maintenance and Repair Workers, General (O*NET 49-9071.00)

Defense contractor jobs for 779B

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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