An airboat is a flat-bottomed boat that sits just below the waterline with no mechanical parts in the water at all.
The hulls are made from aluminum or fiberglass. The boat is propelled with either an aircraft or automotive engine. An airboat's propeller is situated on the back of the boat and never touches the water. Instead it uses air to push the boat forward. Airboat propellers can produce prop wash behind them of around 150 mph. Propellers must be enclosed within protective cages to prevent injury to riders and operators. The boats have elevated seats to allow for better views. Today’s airboats are used for eco-tourism, fishing, hunting, and rescue.