Rather than guess, I would just contact the lender(s) with which you're interested in applying for the loan and simply ask them which bureau they use, scoring model, etc.
Just wondering if anyone knows if banks use a certain credit beareu for boat loans?
The short answer is no. Banks use various combinations of CRAs for credit. They may use one, two or all three CRAs to process an application, and it may vary depending on the region. There is now way to know for sure without contacting that particular lender.