A shallow draft boat has a flat bottom that extends along a substantial length of the boat hull. The port and starboard sides of the boat that extend beyond the bows are slightly inwardly inclined toward the center longitudinal plane of the boat to provide a tumblehome configuration. The hull progressively increases in width from the bows toward the stern and has a maximum width within the rear 15% waterline length of the hull. Compressed air nozzles, in association with venturi nozzles, controllably generate an air cushion under the bottom of the hull for selectively reducing drag on the hull. Fore and aft steering rotors are provided on the bottom of the hull for maintaining the boat accurately along its true heading. The boat also comprises retractable trim surfaces at the stern for adjusting the attitude and the speed of the hull.