There is a halachic ruling that you can put a Sukkah on a camel. So if you can put a Sukkah on a camel then why not put a Succah in a boat? The Chasidim in Venice like to celebrate various Jewish festivals in boats. Here I painted, the Venice Chassidim on a boat in a Sukkah blessing the Lulav. You can see in the picture the Canale Ormesini with the iron bridge which is right behind the new Ghetto.