Did you have it stored in a Marina? We found this out when we had a houseboat in Sacramento that the marinas and storage facilities have to report every stored vessel on account , whether it’s on the property or not, to the county for taxation. Your rate is probably because it is registered in NV, and a CA tag might have taken some off that figure, as you pay some portion at registration, which is how they capture other boat owners who store on their own property.
2022 SA 450