Can you take a catapult on the boat?

I can make a catapult for either direction despite there only being enemies coming from the West (on the first island, anyway).

I know you can use the boat to take a number of archers and builders (and Knights, after some googling) on to the next location, but can it be used to transport a catapult as well? The machine still seems to stop at my furthest wall on that side but I'm wondering if I clear all the trees or something if it will continue to the dock so I can take it with me. I won't bother spending the coin if it's not possible.