All Morris sides adopt a logo or emblem that is worn on their baldricks and other parts of the costume. Ours is the stern end of a particular type of narrow boat called a butty boat.
The canals were created before the mechanical engine was invented and the boats were pulled by a horse. In order to steer them and keep them from being pulled into the bank a large rudder was needed at the back. Later, when steam and deisel engines were fitted to canal boats, many boats were left unfitted as they could be hauled by the powered boats (as a "motor and butty pair") and so carry more cargo.