US Patent 10300994 Pontoon systems and methods

Embodiments include a retrofit pontoon system including a pontoon, the pontoon having a pontoon body defining a first cavity, a retrofit assembly, the retrofit assembly including a tube, wherein the tube is sized to pass through a first aperture formed in the pontoon body and a selectively fillable container, where the tube is operably coupled with the selectively fillable container, and a pump, the pump being coupled with the tube such that operation of the pump selectively fills and drains water from the selectively fillable container, where filling the selectively fillable container lowers the profile of the pontoon in the water and emptying the selectively fillable container raises the profile of the pontoon in the water.