4015 Freighter is a Boats set that was released in 1982. It includes 80 pieces to build a medium sized blue boat and two sailor minifigures that are exclusive to this set. Due to choking hazards, this set was recalled from European toy stores. The boat floats, and includes two weights that attach to the bottom of the hull. These add ballast to keep the boat upright in a body of water, such as a bathtub.