Maybe if it has sails. Otherwise you’re exposed each time you need to refuel at a port. But ferrying about between uninhabited islands for resources and sleeping on the boat sounds like a decent plan.
Well… If I knew how to sail, that is. Or tie proper knots.
It’s also assuming that the zombies can’t swim or walk on the seabed, which they usually can’t
Could also be a bad AI upscale. My iphone does it with text that’s far away