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Navy NEC · Engineering

V63B 5”/62-Caliber MK-45 MOD 4 Gun Mount Maintenance 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

The MK 45 Mod 4 gun mount maintenance technician operates and maintains the 5 inch, 62 caliber gun mount using general purpose, special purpose, and built in test equipment. This technician loads, stows, and unloads ammunition and inspects and maintains magazines and their sprinkling systems.

Core Skills

  • Maintenance using built-in and external test equipment
  • Large-caliber ammunition loading, stowage, and unloading
  • Ammunition magazine inspection and sprinkler 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 Electronics Repairers, Commercial and Industrial Equipment

Using general, special-purpose, and built-in test equipment for gun-mount maintenance provides a foundation for industrial equipment testing and fault diagnosis.

How to prepare: Complete a hands-on industrial electrical troubleshooting course to practice diagnosing circuits and components beyond the gun-mount system.

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.
Civilian tools and software (examples)
  • Circuit evaluation software
  • Computerized maintenance management system CMMS

Maintenance and Repair Workers, General

Gun-mount operation and maintenance, equipment testing, and magazine sprinkler upkeep overlap with general machinery inspection and repair work.

How to prepare: Build a maintenance work sample documenting an equipment inspection, test results, and corrective actions, using a non-sensitive example from your experience.

What the civilian work involves
  • Inspect, operate, or test machinery or equipment to diagnose machine malfunctions.
  • Repair machines, equipment, or structures, using tools such as hammers, hoists, saws, drills, wrenches, or equipment such as precision measuring instruments or electrical or electronic testing devices.

Notes & Sources

Evidence for this guidance (3 documents)
  1. NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC V63B

    [1] NEC entry "V63B - 5”/62-Caliber MK-45 MOD 4 Gun Mount Maintenance Technician"; cached text line 14751; NAVPERS 18068F Vol II, 2026-07 edition

    Supports: Maintenance using built-in and external test equipment, Large-caliber ammunition loading, stowage, and unloading, Ammunition magazine inspection and sprinkler maintenance, Electrical and Electronics Repairers, Commercial and Industrial Equipment (O*NET 49-2094.00), Maintenance and Repair Workers, General (O*NET 49-9071.00)

  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: 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 V63B

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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