These two cardboard ships, a warship and a merchant ship, have seen frequent use in D&D games, as well as in an earlier Iron Heroes game. While IH was a different and refreshing variation from D&D, I find it currently too cumbersome ruleswise.
Some of the ship structures are modular - compare this photo to the one above to see this.
Griffons attack! A battle at sea going on.
Pirates. Who doesn't love pirates?
WIP photo of the models. I exposed the side cardboards to moisture and used a bottle to force them to right shapes. Plank lines are drawn with a ball-point pen by pushing hard. Cocktail sticks, balsa wood and larger stone poles were used too.