The boat bill of sale records the transfer of ownership between two parties trading in watercraft or boating equipment. In person: Please visit our Marine and Aviation Section located at the Kearny Mesa branch office: 9225 Clairemont Mesa Blvd.San Diego, CA 92123. Boat (Vessel) Bill of Sale Form Document utilized to appoint information involved in the transfer of watercraft. Need to write a bill of sale? Click here to follow a step-by-step guide and learn the 15 key elements that must be included in 2023. If you buy the boat without a title, make sure to get a picture of the sellers driver license, a completed Bill of Sale, preferably the DMV form (REG135).