Abstract: A mechanism and method for dynamic trim of the floating position of a fast moving, planing or semi-planing ship hull is suggested, wherein a fully submerged hydro foil (1) is pivotally arranged in a stem portion of the ship and continuously adjustable relative to the angle of attack of the hydro foil for generating a wave, the wave having a length, a width and a depth related to the length, the tonnage and the cruising speed of the ship, wherein the hydro foil is designed relative to the wave so that the wave width is controlled by a span width (a), the wave length is controlled by a chord length (b), and the wave depth is controlled by a load (p) of the hydro foil.

Abstract: The present invention discloses a deflection member for draining, during the operation of a ship hull, an inlet channel (2) to a turned off water jet unit. The deflection member includes a flap (6) that is rotatably or shiftably attached to a bottom of a ship hull. The flap in disposed in front of or immediately in front of an inlet. When the flap is immersed, the flap creates a cavity (0) outside the inlet opening to cover the same.