In the harbor I currently use (renting a slip) I must pay property tax on the patch of seafloor land that is below my boat! Note I don't even own that "land",

In the harbor I currently use (renting a slip) I must pay property tax on the patch of seafloor land that is below my boat! Note I don't even own that "land", I'm just a renter of the slip. But I get a separate property tax bill from the county every year. It's pretty silly.