How do you perfect a security interest and lien on a boat?

To perfect a security interest and lien on a boat, you must first ensure that the security agreement is properly executed and that the necessary documentation is filed according to state and Federal Laws. For vessels documented with the Coast Guard, you should file a Notice of Claim of Lien with the National Vessel Documentation Center. If the boat is state-registered, you may need to file a lien with the appropriate state agency or department of motor vehicles. Additionally, providing notice to the borrower and maintaining possession of the boat (if applicable) can further reinforce your security interest.