Most current plans don't use ships as the basis of a seasteading at least not currently. Most designs that have actually been tried are something like this [0]

Most current plans don't use ships as the basis of a seasteading at least not currently. Most designs that have actually been tried are something like this [0] spar platform reminiscent of the RP Flip [1] which is extremely stable passively in waves. They have very small cross sections to the waves so mostly just bob up and down with the motion of the waves. We already know how to build these pretty large (see oil rigs). [0] https://ocean.builders/wp-content/uploads/2018/10/spar.png https://ocean.builders/wp-content/uploads/2018/10/spar.png [1] https://en.wikipedia.org/wiki/RP_FLIP https://en.wikipedia.org/wiki/RP_FLIP