Entry & progression
Everything so far has been about you. This module is about the vessel — what makes her require a credentialed engineer at all. The line is drawn at 200 GRT, and where it falls on yachts is the most misunderstood question in this course.
The watch officer — 46 CFR 15.825(a)
An engineering watch officer is required on any "mechanically propelled, seagoing, documented vessel of 200 gross tons or more."
Read that sentence for what is not in it. There is no commercial qualifier at all. Not "commercial vessel". Not "vessel carrying passengers for hire". Not "inspected vessel". Three conditions only: mechanically propelled, seagoing, documented, and 200 GRT or more.
The statute — 46 U.S.C. 8304 and 46 CFR 15.701
The statutory requirement reaches every US-documented vessel of 200 GRT or more operating seaward of the Boundary Line, and requires licensed masters, mates and engineers. It carries four exclusions:
- Public vessels
- Primitive wooden vessels — vessels of primitive design and construction
- Barges
- Vessels of less than 200 gross tons
Count them again. Four. A yacht is not one of them. There is no recreational exclusion, no pleasure-vessel exclusion, no private-use exclusion. The text simply does not carve yachts out.
WARNING — This is where the industry gets it wrong — in both directions You will hear, confidently, that a private US yacht needs no licensed crew. That claim is not supportable from the primary text. The statute and the regulation reach documented vessels of 200 GRT or more seaward of the Boundary Line, the exclusions are the four listed above, and a yacht is not among them.
What we cannot tell you — because it could not be confirmed from primary sources — is how the Coast Guard enforces this on private yachts in practice. That is a real and open question, and pretending to answer it would be worse than admitting it.
CAUTION — Do not conclude a private yacht is exempt. Ask the OCMI. The requirement exists on the face of the text. The enforcement practice was not confirmed. Those are two different statements and you must hold both of them at once.
If you need to know where a specific vessel stands — as owner, captain, manager or engineer — the answer comes from the cognizant Officer in Charge, Marine Inspection (OCMI) for that vessel, not from an industry forum and not from this course. Nothing here is a determination for any particular hull.
Three conditions, and each one is a real test
- Documented — a US Certificate of Documentation. This is the flag question. A foreign-flag yacht is governed by her flag state, not by 46 CFR.
- Seagoing — 46 CFR 10.107 defines a seagoing vessel as one that operates beyond the boundary line. It is a geography test. A vessel that never crosses the Boundary Line is not seagoing, however large she is.
- 200 GRT or more — and GRT is not GT. That is the next module, and it is the trap that undoes most of the reasoning people do about this line.
Those three tests do the real work. The argument that a given yacht falls outside the requirement, if it can be made at all, is made on flag, geography and tonnage — not on the fact that she is a yacht. That distinction is the entire lesson.