Ship hull assembly for reducing water resistance and improving maneuverability

An add-on assembly for a ship hull to effect, by means of water suction, controlled changes in water pressure acting on the ship hull, said add-on assembly comprising:

• a propeller chamber for enclosing at least one propeller, said propeller chamber positioned proximate a stern of the ship hull, said propeller chamber comprising two opposed chamber sides, a bottom side and a rear side, at least one chamber opening on each of the two opposed chamber sides, at least one water intake opening extending transverse a width of the bottom of the propeller chamber, and a rear opening at the rear side for each of the at least one propeller;
• a plurality of ducts extending in a longitudinal direction from a front part of the bow to the propeller chamber, each of the ducts comprising a plurality of longitudinally arranged bow openings and at least one stern opening into the propeller chamber for the water to flow directly toward the propeller chamber, said bow openings decreasing in an area dimension along the longitudinal direction from the front part of the bow toward the stern and said bow openings ceasing at an end of a curvature of the bow;
• and
• a bow pressure retention structure comprising a thin extension extending forwardly from a stem of the bow to hinder water pressure shift from a high-pressure side to a low-pressure side, and a plate attached horizontally along a keel of the hull to prevent bow squat because of low pressure effected by water suction.