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Army MOS · Engineering

12D Diver

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

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Overview

A Diver performs or supervises SCUBA and surface supplied diving operations to depths of 190 feet of seawater. The diver supports underwater reconnaissance, demolition, port construction and rehabilitation, harbor clearance, ship husbandry, river crossings, hydrographic surveys, and salvage operations.

Minimum ASVAB: GM 98 and GT 107, or GM 98 and ST 106

ASVAB policy: Not policy-reviewed · coverage unknown · as of 2026-10-19

Program scope has not been reviewed.

Policy applicability and coverage of the program's score routes have not been reviewed. Shown-route arithmetic is not an eligibility decision.

Source: smartbook-611-21-ch10c-fy2025 (source date 2025-12). Policy applicability has not been established.

See if you would hit this score: free ASVAB practice test

Core Skills

  • Underwater port construction and rehabilitation
  • Underwater demolition and salvage operations
  • Underwater reconnaissance and hydrographic surveys

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.

Commercial Divers

Military SCUBA and surface-supplied diving for port construction, harbor clearance, and salvage transfer directly to commercial underwater work.

How to prepare: Compile available dive logs and records of surface-supplied, port construction, and salvage work for review by a commercial diving employer.

What the civilian work involves
  • Take appropriate safety precautions, such as monitoring dive lengths and depths and registering with authorities before diving expeditions begin.
  • Check and maintain diving equipment, such as helmets, masks, air tanks, harnesses, or gauges.
  • Communicate with workers on the surface while underwater, using signal lines or telephones.
Civilian tools and software (examples)
  • Diving logbook software
  • Diving table software

Notes & Sources

Evidence for this guidance (2 documents)
  1. Army COOL MOC feed: 12D Diver

    [1] data/authority/army-codes.json entry 12D (OSD COOL feed, fetched 2026-07-25); DB rank enlisted, authority codeType enlisted

    Supports: Underwater port construction and rehabilitation, Underwater demolition and salvage operations, Underwater reconnaissance and hydrographic surveys, Commercial Divers (O*NET 49-9092.00)

  2. O*NET: Commercial Divers

    [2] O*NET 30.3 occupational data

    Supports: Commercial Divers (O*NET 49-9092.00)

Defense contractor jobs for 12D

Predecessor codes

Historical codes with documented links to 12D. Each history page explains the change.

21D1Diver21D2Diver21D3Diver21D4Diver21D5Diver

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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