A frameless inflatable pontoon boat in which the pontoons and connecting section have a generally flat top and a generally flat bottom. Sufficient rigidity is achieved in the inflatable connecting section and the pontoon by the use of internal thread connections between the top surface and the bottom surface. The internal thread connections confine the inflated shape of the pontoons and connecting section to a flat shape.
CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation application of U.S. patent application Ser. No. 11/300,150, filed Dec. 13, 2005 now U.S. Pat. No. 7,530,321, the entire contents of which is hereby incorporated by reference in its entirety.