You are talking about liability insurance, I assume. So you present paperwork on your boat specifically or via your homeowners insurance?
Ya gotta talk to me as though I don't know nothin', because I really DO know nothin' about all this.
And even if you have a homeowners policy, you have to contact your insurance company and put a rider on there for all the sailboats you have?
I have been sailing for 50 years and know nothing about how to do all this.