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Navy NEC · Engineering

V21A GCS MK 160 MOD 8/OSS MK 46 MOD 1 Fire Control 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. Part of the Fire Control Technician rating

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Overview

A GCS MK 160 MOD 8 and OSS MK 46 MOD 1 fire control technician performs planned and corrective maintenance on the gun computer and optical sight systems. The technician analyzes casualties, isolates faults, replaces and repairs modules, tests and aligns equipment, and operates gun and optical sight consoles during tactical operations, tests, and evaluations.

Core Skills

  • Fault isolation using built-in diagnostics
  • Modular equipment replacement and repair
  • Optical sight equipment testing and alignment
  • Console operation during test and evaluation

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 Electronics Repairers, Commercial and Industrial Equipment

Planned and corrective maintenance, fault isolation, modular replacement, and equipment testing on the gun computer and optical sight systems transfer directly to electronic equipment repair.

How to prepare: Complete a hands-on industrial electronics troubleshooting lab that uses external test equipment to diagnose faults and verify repairs.

What the civilian work involves
  • Test faulty equipment to diagnose malfunctions, using test equipment or software, and applying knowledge of the functional operation of electronic units and systems.
  • Set up and test industrial equipment to ensure that it functions properly.
  • Install repaired equipment in various settings, such as industrial or military establishments.
Civilian tools and software (examples)
  • Circuit evaluation software
  • Computerized maintenance management system CMMS

Photonics Technicians

Maintenance, testing, and alignment of the MK 46 optical sight system provide a foundation for maintaining and adjusting photonic equipment.

How to prepare: Take a hands-on photonics laboratory course focused on optical measurement and calibration to extend sight-system experience to civilian optical test equipment.

What the civilian work involves
  • Compute or record photonic test data.
  • Adjust or maintain equipment, such as lasers, laser systems, microscopes, oscilloscopes, pulse generators, power meters, beam analyzers, or energy measurement devices.
  • Document procedures, such as calibration of optical or fiber optic equipment.
Civilian tools and software (examples)
  • Microsoft Excel

Notes & Sources

Evidence for this guidance (3 documents)
  1. NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC V21A

    [1] NEC entry "V21A - GCS MK 160 MOD 8/OSS MK 46 MOD 1 Fire Control Technician"; cached text line 13470; NAVPERS 18068F Vol II, 2026-07 edition

    Supports: Fault isolation using built-in diagnostics, Modular equipment replacement and repair, Optical sight equipment testing and alignment, Console operation during test and evaluation, Electrical and Electronics Repairers, Commercial and Industrial Equipment (O*NET 49-2094.00), Photonics Technicians (O*NET 17-3029.08)

  2. O*NET: Electrical and Electronics Repairers, Commercial and Industrial Equipment

    [2] O*NET 30.3 occupational data

    Supports: Electrical and Electronics Repairers, Commercial and Industrial Equipment (O*NET 49-2094.00)

  3. O*NET: Photonics Technicians

    [3] O*NET 30.3 occupational data

    Supports: Photonics Technicians (O*NET 17-3029.08)

Defense contractor jobs for V21A

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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