Navy NEC · Engineering

T23A SSN 21 Navigation 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.

Overview

SSN 21 navigation technicians operate submarine navigation, radar, positioning, atmosphere monitoring, depth detection, and electromagnetic log equipment. They perform preventive and organizational level maintenance on AN/WSN-7(A), AN/WSN-7(B), AN/BPS-16 Radar, AN/WRN-6 GPS, CAMS MK II, AN/WIC-2B, Digital Depth Detector, and Digital EM Log systems.

Core Skills

  • Radar and GPS equipment maintenance
  • Digital depth detector and EM log operation

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

Operating and performing preventive and organizational-level maintenance on submarine radar, GPS, and digital navigation equipment provides directly relevant experience for electronic equipment maintenance.

How to prepare: Complete a hands-on commercial electronics troubleshooting course focused on fault diagnosis with test equipment and circuit evaluation software.

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.
  • Inspect components of industrial equipment for accurate assembly and installation or for defects, such as loose connections or frayed wires.
  • Maintain equipment logs that record performance problems, repairs, calibrations, or tests.
Civilian tools and software (examples)
  • Circuit evaluation software
  • Computerized maintenance management system CMMS

Notes & Sources

Evidence for this guidance (2 documents)
  1. NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC T23A

    [1] NEC entry "T23A - SSN 21 Navigation Technician"; cached text line 10709; NAVPERS 18068F Vol II, 2026-07 edition

    Supports: Radar and GPS equipment maintenance, Digital depth detector and EM log operation, Electrical and Electronics Repairers, Commercial and Industrial Equipment (O*NET 49-2094.00)

  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)

Defense contractor jobs for T23A

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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