Wiper to QMED › The Engine Officer Ladder
Checked against 46 CFR 11.510–11.516 and 11.903 · October 2026
The short answer
- The licensed engine ladder for unlimited vessels runs Third Assistant Engineer → Second Assistant → First Assistant → Chief Engineer.
- Getting your first license, Third Assistant Engineer, is the big step. You get there through engine-room sea time as a QMED (Qualified Member of the Engine Department), a maritime academy, an engineering degree plus sea time, or an approved apprentice program.
- You take two Coast Guard exams in your engineering career: one for Third Assistant (operational level) and one for First Assistant (management level). Second Assistant and Chief Engineer come from sea time, about a year at each step.
- Seagoing work also needs STCW engineer endorsements and the courses that go with them.
- Keep your own record of every trip, including the vessel's propulsion type and horsepower.
The ladder
For unlimited-horsepower steam, motor or gas turbine vessels. Sources: 46 CFR 11.516, 11.514, 11.512, 11.510
Step 1: Get to Third Assistant Engineer
This is your first engineer license. The regulation gives several routes: 46 CFR 11.516
| Route | What it takes | Good fit for |
|---|---|---|
| Hawsepipe (working up from the engine room) | 3 years of engine-room service, 2 of them as a QMED or equivalent | Wipers and QMEDs already sailing |
| Maritime academy | Complete an approved marine engineering program | Young people starting out Academy route → |
| Marine engineering degree | Accredited marine engineering degree plus 3 months of engine-department sea service | Engineering graduates |
| Mechanical or electrical engineering degree | Accredited degree plus 6 months of engine-department sea service | Engineers changing careers |
| Approved apprentice engineer program | Complete a Coast Guard-approved apprentice engineer program | Union and company training programs |
| Machinist apprenticeship | 3 years as a machinist apprentice on marine, locomotive or stationary engines, plus 1 year in the engine room as Oiler, Watertender or Junior Engineer | Shore mechanics with trade backgrounds |
All routes also need the Coast Guard exam (or an approved course that substitutes for it), a medical certificate, drug testing, and the required training, including Advanced Fire Fighting →
Coming from the Navy or Coast Guard? Military engineering service may count, depending on the vessel and your duties. Military to Mariner →
Step 2: Sail as Third, then Second Assistant
With 1 year of service as an assistant engineer while holding Third Assistant, you can apply for Second Assistant. Another route allows 6 months as Third Assistant plus QMED service counted two days for one. 46 CFR 11.514
No new exam is needed for Second Assistant if you were already examined at the operational level as Third Assistant. 46 CFR 11.903
Step 3: First Assistant Engineer
With 1 year of service as an assistant engineer while holding Second Assistant, you can go for First Assistant. This is the management-level step, and it comes with an exam. 46 CFR 11.512
Plan the required STCW management-level courses while you're still sailing as Second Assistant, so they're done when your sea time is.
Step 4: Chief Engineer
1 year of service as First Assistant, or 1 year holding First Assistant that includes at least 6 months as First Assistant, with some Second or Third Assistant time counted two days for one. 46 CFR 11.510 No new exam is needed: the management-level exam you passed for First Assistant covers Chief Engineer. 46 CFR 11.903
STCW: the second set of endorsements
If you sail on seagoing vessels covered by STCW, you'll need STCW engineer endorsements alongside the national license, each with its own training and assessments. National vs. STCW →
| National endorsement | Usual STCW endorsement | Level |
|---|---|---|
| Third and Second Assistant Engineer | Officer in Charge of an Engineering Watch (OICEW) | Operational |
| First Assistant Engineer | Second Engineer Officer | Management |
| Chief Engineer | Chief Engineer Officer | Management |
Use the NMC checklist for each endorsement to find the exact courses and assessments. Keep STCW endorsements current too. Keeping STCW current →
Not on unlimited ships?
Engineer endorsements are limited by propulsion type (steam, motor, gas turbine) and sometimes by horsepower. Smaller vessels have their own engineer endorsements, such as Designated Duty Engineer (DDE) and the Limited engineer endorsements, each with its own service requirements. Check the NMC checklist for the endorsement that fits the boats you work on.
Common mistakes
- Letters without propulsion type and horsepower. Engineer endorsements depend on both. Get them on every letter.
- Split deck and engine time without a breakdown. If you worked both, the letter must show the engine-room days.
- Counting time that doesn't qualify. The routes call for service in specific positions. Check what each day counts as before you apply.
- Leaving STCW courses until last. That can hold up an upgrade for months.
- Assuming a course gives you the license. The course is evidence; the NMC issues the endorsement.
The engine room rewards people who keep good records as much as people who keep good machinery. Ask for your sea-service letter every time you sign off, check the horsepower and propulsion on it, and plan your courses a year ahead.
Official sources
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