Abstract: The present invention is to a self-propelled boat launch and methods of operating components of the boat launch a launch vehicle. The launch vehicle includes a partially submersible generally frame. The frame comprises a front frame unit and a modular carriage frame section, comprising at least one modular carnage frame. The boat launch is self-propelled with track assemblies driven by a hydraulic system powered by an engine assembly. The engine assembly is preferably mounted on top of the front frame unit. At least two track assemblies are in removable communication with a modular carriage frame. A track tensioner is provided for increased tension on a continuous track of the track assembly. A track cleaner is described for removal of foreign objects from at least one track assembly. Further, a method of operating the track tensioner is described. A method of operating the track cleaner is described.