Re: @A.P. Veening Economists - In 1889?
" There was one well known and quite successful French yachtsman who had a keel of uranium in his offshore racing yacht for that reason."
Wait long enough, of course, and it would turn to lead.
But the ideal keel material would be osmium. You'd need 10 years of world supply to make a decent keel, but you'd be able to work up quite a clip around your volcanic island lair with the wind blowing the right way.