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Navy NEC · Engineering

748B Boiler Repair 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 Boiler Repair Technician performs intermediate and organizational maintenance on marine propulsion boilers. This technician reviews and maintains records and reports related to boiler repair.

Core Skills

  • Marine propulsion boiler maintenance at two levels
  • Boiler repair records review and 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.

Boilermakers

Organizational and intermediate maintenance of marine propulsion boilers transfers directly to the boiler repair work performed by boilermakers.

How to prepare: Compare your documented boiler repair experience with a boilermaker training program's pressure-testing, blueprint-reading, and vessel-inspection curriculum to identify practical training gaps.

What the civilian work involves
  • Conduct pressure tests on vessels, such as boilers.
  • Examine boilers, pressure vessels, tanks, or vats to locate defects, such as leaks, weak spots, or defective sections, so that they can be repaired.
  • Inspect assembled vessels or individual components, such as tubes, fittings, valves, controls, or auxiliary mechanisms, to locate any defects.

Stationary Engineers and Boiler Operators

Marine propulsion boiler maintenance provides relevant equipment experience for a transition into boiler operation and monitoring.

How to prepare: Ask the licensing authority where you intend to work which boiler license class applies and whether your documented maintenance experience satisfies its experience requirement. Some state and local governments require experience and a written examination for licensure, with classes limiting the equipment type and size operated without supervision; moving jurisdictions may require another examination.

What the civilian work involves
  • Operate or tend stationary engines, boilers, and auxiliary equipment, such as pumps, compressors, or air-conditioning equipment, to supply and maintain steam or heat for buildings, marine vessels, or pneumatic tools.
  • Monitor boiler water, chemical, and fuel levels, and make adjustments to maintain required levels.
  • Observe and interpret readings on gauges, meters, and charts registering various aspects of boiler operation to ensure that boilers are operating properly.
Civilian tools and software (examples)
  • Building management system software

Notes & Sources

Evidence for this guidance (4 documents)
  1. NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC 748B

    [1] NEC entry "748B - Boiler Repair Technician"; cached text line 17854; NAVPERS 18068F Vol II, 2026-07 edition

    Supports: Marine propulsion boiler maintenance at two levels, Boiler repair records review and maintenance, Boilermakers (O*NET 47-2011.00), Stationary Engineers and Boiler Operators (O*NET 51-8021.00)

  2. O*NET: Boilermakers

    [2] O*NET 30.3 occupational data

    Supports: Boilermakers (O*NET 47-2011.00)

  3. O*NET: Stationary Engineers and Boiler Operators

    [3] O*NET 30.3 occupational data

    Supports: Stationary Engineers and Boiler Operators (O*NET 51-8021.00)

  4. Bureau of Labor Statistics: Stationary Engineers and Boiler Operators

    [4] How to Become a Stationary Engineer or Boiler Operator; Licenses, Certifications, and Registrations; page dated 2026-08-27, retrieved 2026-09-23

    Supports: Stationary Engineers and Boiler Operators (O*NET 51-8021.00)

Defense contractor jobs for 748B

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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