Pontoon

A pontoon is a flat-bottomed boat or the floats used to support an arrangement on water. It may be simply constructed from closed cylinders such as pipes or barrels or made-up of boxes from metal or concrete. These may be worn to support a simple platform, creating a raft. A raft supporting a house-like structure is single form of houseboat.
Pontoon boats usually run slower and are less likely to cause harm to themselves or other vessels, and are thus less luxurious to insure. As such, they are the most admired vessel style for rental operations. They also present the largest value in terms of capacity to price.