As a swell rolls up under the bow, the momentum of the swell is transferred to the tree, which swings backwards freely and unquestioningly. This is an artist's rendition; please understand that a technical draft would be more precise. Nonetheless it bears pointing out that this is a lethal weapon. If this device was installed improperly, and got loose, I promise you that it could shoot out of the bow like a torpedo, and kill anyone in it's path !
