AFAIK only California
and Louisiana treat cars in a very odd way: The license plate attaches to the car "forever" and the registration
is also due forever, as long as the plate isn't surrendered. Even if the car is pulled off the road and garaged...they make it difficult to just surrender the plate and keep the car on blocks, or so I'm told.
So I wouldn't be surprised if they treat boats in a similar fashion. As Tom Snyder said long ago when he was on TV, all the fruits and nuts ripen on the trees in California, then they roll off and end up on the other coast.
In most states, maybe all the other states, the license plate attaches to the OWNER of the vehicle, and if you sell the vehicle, the plates never transfer with it. For better or worse--things are just different in CA.