USCG-ENG-SEA-L3.3
When STCW attaches
USCG-ENG-SEA-M3 · When a Vessel Needs an Engineer · USCG-ENG-SEA-M3-A Manning — where the number actually comes from.
This lesson unpacks the two-trigger structure of 46 CFR 15.1103(a), explaining how the size-and-power test and the international-voyage test independently activate the STCW endorsement requirement, and where the domestic-voyage exemption ends.
AI-drafted catalogue content pending SME review. Sea service crediting and manning requirements change, and enforcement practice on recreational vessels was not confirmed from primary sources; verify with the National Maritime Center and the cognizant OCMI before relying on this for a career decision.