Entry & progression
The QMED is the gateway to the officer ladder — and the officer ladder has a gate the QMED does not. 46 CFR 11.201(d): no officer endorsement may be issued to any person who is not a citizen of the United States. Read that before you plan a decade.
What the QMED buys you
| National grade | The QMED content of it |
|---|---|
| Designated Duty Engineer (< 1,000 HP) | 1 year engineroom, 6 months of it as QMED or equivalent |
| Designated Duty Engineer (< 4,000 HP) | 2 years engineroom, 1 year as QMED or equivalent |
| Designated Duty Engineer (unlimited HP) | 3 years engineroom, 18 months as QMED or equivalent |
| Assistant Engineer-Limited | 3 years engineroom, 18 months as QMED or equivalent |
| Chief Engineer-Limited | 5 years engineroom, 30 months as QMED, and 2 years as an engineer officer |
| Third Assistant Engineer | 3 years engineroom, 2 years of it as QMED — the hawsepipe route |
Six grades, and QMED service is the currency in every one of them. Time spent as a Wiper gets you to the QMED; time spent as a QMED is what buys the licence.
Two traps on the way up
WARNING — "DDE-Unlimited" means unlimited HORSEPOWER, not an unlimited vessel Every Designated Duty Engineer endorsement — including DDE-Unlimited — is limited to vessels of less than 500 GRT (11.524(a), 11.501(c)). And the two lower tiers, DDE < 1,000 HP and DDE < 4,000 HP, are near-coastal or inland only — they do not go to sea on oceans at all. This is the single biggest trap on the engineering side, and it has caught people who thought they had bought themselves a big-yacht ticket.
NOTE — Gross tonnage caps the lower grades — even though engineering is scoped in power Chief Engineer, First, Second and Third Assistant Engineer have no tonnage limit whatsoever. The Limited grades are capped at less than 1,600 GRT on ocean, near-coastal and Great Lakes routes (unlimited inland). Every DDE tier is capped at less than 500 GRT. So: engineering is scoped in HP and kW — but tonnage still caps exactly the two rungs a yacht engineer is most likely to hold. Do not over-claim in either direction.
And the gate at the top of the stairs
46 CFR 11.201(d): "No officer endorsement may be issued to any person who is not a citizen of the United States." The only carve-out in the section is an OUPV on non-US-documented vessels — and that is a deck ticket. There is no engineering exception, at any grade, at any horsepower, on any route.
WARNING — If you are not a US citizen, the officer ladder is closed Not harder. Closed. A non-citizen cannot obtain any USCG engineer officer endorsement — not DDE, not Assistant Engineer-Limited, not Third Assistant. The ratings in Modules 2 and 3 are a different question and one to put to the NMC. But do not spend years building sea service toward an American licence you cannot be issued. Find this out at the start of a career, not in the middle of one.
The honest last word
There is no USCG yacht engineering credential. The list of national engineer grades is closed, and it makes special provision for fishing vessels, MODUs and offshore supply vessels — not yachts. A yacht engineer on a US-flagged vessel therefore holds the ordinary commercial engineering credential, the same one held by the engineer on a tug or a tanker.
That is not a gap in your career. It is your career. The commercial ladder is the yacht ladder, and it is the right one to learn.