Coast Guard Documentation?
Not tricky at all - I just changed hail port for my boat requiring two forms and a check for the cost. It takes a while (months) but no more time than the "service" that will charge $500 for the transfer. Many lenders will insist that you use a service - not transfer on your own. If they do not force you to use a service, do it yourself. The forms can be downloaded from the USCG site and contain adequate explanation.