Entry & progression
Entry: all of Module 1. Progression: this is the lesson that tells you whether to spend the next three years earning a DDE at all. The DDE ceiling follows you into STCW. It is footnoted into every entry table.
WARNING — A DDE-derived STCW certificate is itself capped at less than 500 GRT Every entry path from a DDE into an STCW engineer endorsement carries the same footnote: "STCW certificate should be limited to vessels less than 500 GRT." It is in the tables at 11.325(d), 11.327(d), 11.329(e) and 11.331(e) — every one of them.
So you can grind out 24 months as a DDE, reach STCW Chief Engineer Officer, and receive a certificate that is legally useless on a 3,000 GT yacht. The cap follows you across.
| Route from DDE | Additional service | Result |
|---|---|---|
| DDE, any horsepower → STCW Chief Engineer Officer ≥3,000 kW (11.325(d)) | 24 months as DDE | Certificate limited to < 500 GRT |
| DDE-Unlimited → STCW Second Engineer Officer ≥3,000 kW (11.327(d)) | 12 months as DDE | Certificate limited to < 500 GRT |
The way through: Assistant Engineer-Limited — 46 CFR 11.522
"3 years of service in the engineroom of vessels. Eighteen months of this service must have been as a QMED or equivalent position."
Now read the DDE-Unlimited row in Lesson 1.2 again. It is the same service. Three years engineroom, eighteen months QMED. What it buys is completely different: unlimited tonnage inland, and less than 1,600 GRT on oceans, near-coastal and the Great Lakes (11.501(b)) — three times the DDE cap — with an exam at 11.903(a)(33) and a minimum age of 19.
TIP — If you are three years in and choosing, this is the decision that matters Same sea service. Same QMED portion. DDE-Unlimited gives you 500 GRT and the sole-engineer role. Assistant Engineer-Limited gives you 1,600 GRT and an officer-of-the-watch role. Choose early — because from this rung upward the horsepower formula at 11.503(b) applies to you, and a career spent entirely on small mains computes to a small limit.
Then Chief Engineer-Limited — 46 CFR 11.518
"5 years of total service in the engineroom of vessels. Two years of this service must have been as an engineer officer while holding an engineer officer endorsement. Thirty months of the service must have been as a QMED or equivalent position." Chief capacity, same tonnage envelope. Minimum age 21 — CE-Limited is not on the 19 list. Exam at 11.903(a)(32), waived in certain near-coastal, horsepower-limited cases under 11.903(c)(7)–(8).
The crossover — and it is a real door
11.512(a)(2): one year as a Chief Engineer-Limited, plus the examination, produces a First Assistant Engineer — an unlimited grade, with no tonnage limit of any kind. From there, one year as First Assistant produces Chief Engineer, and there is no examination for Chief Engineer at all (11.903(c)(6)).
There are exactly two professional exams on the unlimited ladder: Third Assistant Engineer (operational) and First Assistant Engineer (management). "You test at every rung" is false.
The hidden gate — get big-machinery time
NVIC 15-14, Enclosure (1) ¶1: an applicant for STCW Chief or Second Engineer Officer must hold or qualify for a national endorsement for at least 4,000 HP. Through 11.503(b), that means at least half your qualifying service on vessels of 4,000 HP / 3,000 kW or more. The kW ceiling on the STCW side and the HP ceiling on the national side are the same wall in two units — and 11.503(c) is the ladder out: 6 months in your highest endorsed grade on vessels of 4,000 HP or more removes all horsepower limits.
Where to go next
- QMED — the rating underneath every rung above. If you have not got it, start there.
- Assistant Engineer-Limited / Chief Engineer-Limited — the < 1,600 GRT ladder, and the real route off the ceiling.
- The unlimited ladder — Third, Second, First Assistant and Chief Engineer. No tonnage limit at all.
- OICEW and the STCW engineering endorsements — what the world outside the US asks to see.