Does anyone have a good idea of how in the world people adjusted the rigging on undecked galleys? For something like a trireme or a larger Hellenistic ship, where there's at least a partial deck, it's not difficult to see, but I have difficulty imagining how one could rotate yards, raise sails, adjust trim, and the like in a penteconter or Renaissance galley, where most of the surface is just packed with rowers.