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Navy NEC · Engineering

T42A Master Sonar Technician (Submarines)

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 Master Sonar Technician conducts in-depth acoustic analysis, performs advanced sonar operations, and evaluates contacts aboard submarines. This technician also coordinates sonar operations required by Leading Chief Petty Officers.

Core Skills

  • In-depth acoustic signal analysis
  • Evaluation of sonar contacts
  • Advanced sonar operations and coordination

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.

Remote Sensing Technicians

In-depth acoustic analysis and sonar contact evaluation provide transferable experience for interpreting remotely sensed data and assessing its quality.

How to prepare: Build a small ESRI ArcGIS project that checks a public remote-sensing dataset for accuracy and integrates it with another geospatial data source.

What the civilian work involves
  • Verify integrity and accuracy of data contained in remote sensing image analysis systems.
  • Integrate remotely sensed data with other geospatial data.
Civilian tools and software (examples)
  • ESRI ArcGIS software
  • Python

Remote Sensing Scientists and Technologists

Advanced acoustic analysis and contact evaluation provide a foundation for extracting meaningful results from remote-sensing measurements.

How to prepare: Complete a remote-sensing image-analysis course with a Python project that applies statistical methods to aircraft or satellite data and documents the results.

What the civilian work involves
  • Manage or analyze data obtained from remote sensing systems to obtain meaningful results.
  • Analyze data acquired from aircraft, satellites, or ground-based platforms, using statistical analysis software, image analysis software, or Geographic Information Systems (GIS).
Civilian tools and software (examples)
  • Python

Notes & Sources

Evidence for this guidance (3 documents)
  1. NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC T42A

    [1] NEC entry "T42A - Master Sonar Technician (Submarines)"; cached text line 10987; NAVPERS 18068F Vol II, 2026-07 edition

    Supports: In-depth acoustic signal analysis, Evaluation of sonar contacts, Advanced sonar operations and coordination, Remote Sensing Technicians (O*NET 19-4099.03), Remote Sensing Scientists and Technologists (O*NET 19-2099.01)

  2. O*NET: Remote Sensing Technicians

    [2] O*NET 30.3 occupational data

    Supports: Remote Sensing Technicians (O*NET 19-4099.03)

  3. O*NET: Remote Sensing Scientists and Technologists

    [3] O*NET 30.3 occupational data

    Supports: Remote Sensing Scientists and Technologists (O*NET 19-2099.01)

Defense contractor jobs for T42A

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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