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.