Too many things to list
I am a Marine Surveyor and have seen many problems with new or nearly new boats. Everything from blistering to voids in the deck to misaligned chainplates to improperly installed electrical accessories. It is true that an experienced and knowledgeable boat owner could find many of these problems but not many take the time to check things as completely as a surveyor should. Many of the problems I have seen would have been covered by warranty if they had been discovered and reported within the warranty period. The bottom line is that if you are financing the boat, the lender will require it and most likely the insurance company will as well. And as others have said, do not be afraid to ask questions of the surveyor, before or after the survey is done. I encourage the buyer to be present at the survey but not all surveyors do so ask.Dan Sheehan AMS