Come on guys, He is not asking about anything other than what is necessary to "sell" boats in the USA. Just like in the E.U. you have to document that the boat
you want to market complies with the safety regulations that are supposed to provide a level of "protection" for their citizens from defective or unsafe vessels. The USA has the same type of laws and regulations for all forms of transportation vehicles and vessels that are marketed. You can access the regulations yourself and get a feeling for what is needed, but normally it is much wiser to consult a specialist such as a "Trade Lawyer" to get a definitive understanding of the requirements to import
and market a vessel.
- - Since there are many "foreign" vessels marketed in the USA (and vice versa, in the E.U.) if your vessels are built to E.U. standards there will be only minor other considerations to enable them to be marketed in the USA. A lot of the items involve placards and electrical