Vee bottom structure for boat

A Vee bottom structure for a boat, for use on fast, planing boats, comprising a stern, a bow, and sides which are symmetrical relative to a keel line and which constitute an outwardly substantially convex structure, characterized in that

• the bottom structure comprises a part extending from the stern towards the bow up to a certain distance, this part including central bottoms which are positioned at an angle to each other beside the keel line on either side thereof, and of side bottoms extending outward from outer margins of said central bottoms and positioned at an angle against the central bottom on the respective side;
• each of a plurality of bottom lines between each of the central bottoms and each of the side bottoms is parallel with the keel line up to a certain distance from the stern towards the bow;
• the breadth of the side bottom is at least equal to the breadth of the central bottom;
• the bottom angle between the central bottom and the side bottom is greater than an keel angle between the central bottoms so that the boat is stable and not capsize;
• wherein the bottom angles in the range of 130.degree. to 170.degree., advantageously 140.degree. to 160.degree., e.g. 150.degree. to 160.degree.;
• wherein the central bottoms and the side bottoms in combination constitute a bottom structure of the boat up to the level of its deck plane;
• wherein the bottom lines run in one plane, which includes a horizontal plane, from the stern of the hull, coming together with the upward curving keel line;
• wherein the central bottom and the side bottom are substantially straight planes both in the longitudinal and lateral direction, up to a certain distance towards the bow from the stern of the boat;
• and
• wherein a substantially uniform and unchanged hull cross section extends from the stern of the boat 15 to 60% of the boat's length, advantageously 20 to 50%, e.g. about 30 to 40%.