I work in the finance industry (energy project finance, all technologies, all sizes). Based on where I worked previously before setting up my own energy consulting practice I have had an opportunity to see a good bit of securitization and it is fair to say that there have been securitization structures applied to a very broad range of assets. That said, I have not heard of a pure boat loan securitization although they might have ocurred. There have been securitizations of consumer loans and I would strongly suspect that some of these consumer loans likely involved boats as part of a broad mix of types of consumer loans. Generally, for securitizations of things like autos, rail cars, and loans relating to assets like that which have frequently been done in securitizations limited to a single asset class, there have to be large numbers of such assets and the values have to be easily and readily assignable to the assets by an appraiser. That process would be difficult if not impossible with boats. Hope that helps.
Jim