sentences:  It works by creating a small channel along the stern of the boat at the transom- when it is closed, the nose of the boat is lower when on a plane creating a wake better for skiing.When the trough opens, approximately 1/2 inches deep, the higher velocity of the water through the trough creates a region of lower pressure, and causes the transom to settle lower, for wakeboarding.Epic Boats Integrated Wake Shape Plate and Dynamic Reduction of Pressure Zone Wake-Enhancing Technology.