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Army MOS · Engineering

88L Watercraft Engineer

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

Watercraft Engineers supervise or perform unit, direct support, and general support maintenance. They also service Army watercraft, amphibians, and auxiliary equipment on marine vessels.

Minimum ASVAB: MM 99

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

  • Amphibious craft and auxiliary equipment servicing
  • Unit, direct support and general support 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.

Ship Engineers

Maintaining Army watercraft and marine auxiliary equipment provides directly relevant experience for shipboard engineering work.

How to prepare: Submit an official sea-service transcript or assignment history, with vessel tonnage, routes, propulsion power, underway time and duties, for USCG evaluation toward an MMC engineer endorsement suited to your target vessel and route; a DD-214 is not acceptable sea-service evidence. Plan for the applicable sea-time requirement, typically several years, approved training, medical and professional examinations, drug screening and usually a TWIC, using the evaluation to identify gaps in your existing service.

What the civilian work involves
  • Monitor engine, machinery, or equipment indicators when vessels are underway, and report abnormalities to appropriate shipboard staff.
  • Monitor and test operations of engines or other equipment so that malfunctions and their causes can be identified.

Maintenance Workers, Machinery

Army watercraft and auxiliary-equipment maintenance transfers to servicing and repairing civilian machinery.

How to prepare: Build a work-sample summary of equipment you serviced and repairs you performed, then compare it with a target employer's machinery to identify equipment-specific training needs.

What the civilian work involves
  • Dismantle machines and remove parts for repair, using hand tools, chain falls, jacks, cranes, or hoists.
  • Reassemble machines after the completion of repair or maintenance work.
  • Install, replace, or change machine parts and attachments, according to production specifications.
Civilian tools and software (examples)
  • Computerized maintenance management system software CMMS

Training & Development

Choose credentials for your target role. COOL funding markers describe program listings, not a guarantee of eligibility or funding.

Career Growth

  • National Designated Duty Engineer Steam/Motor/GT

    Pursue the propulsion grade supported by USCG evaluation of your documented service. All DDE grades cover vessels below 500 GRT: the below-1,000-HP and below-4,000-HP grades are limited to near-coastal or inland waters, while unlimited propulsion power permits any waters but does not remove the tonnage limit.

    Eligibility and preparation: An appropriate examination and grade-specific engineroom service are required: below 1,000 HP/750 kW requires 1 year, including 6 months as QMED or equivalent; below 4,000 HP/3,000 kW requires 2 years, including 1 year as QMED or equivalent; unlimited propulsion power requires 3 years, including 18 months as QMED or equivalent.

    For: Ship Engineers

Notes & Sources

  • Open-ocean ship-engineering service requires USCG-verified STCW training; an STCW endorsement generally also requires the appropriate national endorsement.
Evidence for this guidance (9 documents)
  1. Army COOL MOC feed: 88L Watercraft Engineer

    [1] data/authority/army-codes.json entry 88L (OSD COOL feed, fetched 2026-07-25); DB rank enlisted, authority codeType enlisted

    Supports: Amphibious craft and auxiliary equipment servicing, Unit, direct support and general support maintenance, Ship Engineers (O*NET 53-5031.00), Maintenance Workers, Machinery (O*NET 49-9043.00)

  2. O*NET: Ship Engineers

    [2] O*NET 30.3 occupational data

    Supports: Ship Engineers (O*NET 53-5031.00)

  3. Bureau of Labor Statistics: Water Transportation Workers

    [3] How to Become; training, licenses and related experience; updated August 27, 2026, checked September 23, 2026

    Supports: Ship Engineers (O*NET 53-5031.00)

  4. USCG: 46 CFR 10.232 military sea-service evidence and credit

    [4] Paragraphs (a) and (d)(1), official eCFR snapshot September 21, 2026; retrieved September 24

    Supports: Ship Engineers (O*NET 53-5031.00), National Designated Duty Engineer Steam/Motor/GT

  5. USCG: 46 CFR 11.201 officer-endorsement requirements

    [5] Paragraph (a), official eCFR snapshot September 21, 2026; retrieved September 24

    Supports: Ship Engineers (O*NET 53-5031.00)

  6. O*NET: Maintenance Workers, Machinery

    [6] O*NET 30.3 occupational data

    Supports: Maintenance Workers, Machinery (O*NET 49-9043.00)

  7. COOL credential mapping: National Designated Duty Engineer Steam/Motor/GT

    [7] 88L cached COOL credential feed

    Supports: National Designated Duty Engineer Steam/Motor/GT

  8. USCG 46 CFR 11.524: National Designated Duty Engineer service requirements

    [8] Paragraphs (a)-(c); official 2026-09-21 XML snapshot retained, checked 2026-09-24.

    Supports: National Designated Duty Engineer Steam/Motor/GT

  9. USCG 46 CFR 11.501: DDE vessel, propulsion and route limits

    [9] Paragraphs (c)-(e); official 2026-09-21 XML snapshot retained, checked 2026-09-24.

    Supports: National Designated Duty Engineer Steam/Motor/GT

Defense contractor jobs for 88L

Predecessor codes

Historical codes with documented links to 88L. Each history page explains the change.

61CWatercraft Engineer

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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