Abstract: A linear extension attachable to the aft end of an existing pontoon boat, including a v-hull shaped portion behind an outboard, inboard, or inboard-outboard motor, with the keel of the v-hull shaped portion centered on a propeller of the motor, a pair of water directing tubes on each side of the v-hull shaped portion, a pair of outside walls on either side of the water directing tubes, and a set of board deflectors that extend vertically downward in order to create a phenomenon similar to “hydraulic jump,” thereby creating the surfing wave.

Abstract: A tensioning apparatus for operably applying forces to inner surfaces of a hollow body includes a bracing nut having a first receptacle portion and a bracing portion, an axially movable rod that is operably coupled to the bracing nut such that a first portion of the rod is selectively axially movable within the bracing nut, a wedge structure that is operably engaged with the rod for coaxial movement therewith, and a tensioning body that is operably and slidably engaged with the wedge structure. The tension body and the wedge structure have corresponding and facing sloped surfaces such that selectively axial motion of the rod correspondingly and coaxially moves the wedge structure, which coaxial movement of the wedge structure therefore progressively radially displaces the tensioning body to provide tensioning forces against respective inner surfaces of the hollow body.