Pontoon Boat

A pontoon is a flat-bottomed boat or the floats used to support a structure on water. It may be simply constructed from closed cylinders such as pipes or barrels or fabricated as boxes from metal or concrete. These may be used to support a simple platform, creating a raft. A raft supporting a house-like structure is one form of houseboat. The basic design is usually implemented as a simple catamaran or, with three rows of floats, a trimaran. A fixed platform can be used as a dock.