Planing hull catamaran for high speed operation in a seaway

A boat hull comprising a pair of demi-hulls, the demi-hulls respectively having:

• a running surface configured to contact water when the hull is planing, the running surface extending longitudinally along a keel between an outer chine and an inner chine, the running surface having an aft terminal edge and an intersection point where a hydrostatic waterline of the demi-hull intersects a bow section of the demi-hull;
• a first step extending laterally across the running surface and between the outer chine and inner chine, the first step being positioned 38% to 46% of a distance forward the aft terminal edge and the intersection point measured along a ¼ buttock line of the demi-hull;
• and
• a second step extending laterally across the running surface and between the outer chine and inner chine, the second step being positioned 18% to 27% of the distance forward the aft terminal edge and the intersection point measured along the ¼ buttock line of the demi-hull.