Proof Of My Chine Theory.

Chine Notes From Wiki ;

The first hulls to start incorporating hard chines were probably shallow draft cargo carrying vessels used on rivers and in canals.
The barge and later the scow used a flat bottom and near vertical sides,
which provided the maximum cargo carrying capacity (in both space and displacement) available for a given depth of water.

Once sufficiently powerful marine motors had been developed to allow powerboats to plane,
it was found that the flat underside of a chined boat provided maximum hydrodynamic lift,
while the sharp discontinuity at the chine enabled spray to be deflected away as opposed to riding up the sides of the boat.
Consequently, almost all boats designed for high speed on the plane are nowadays of hard chine construction.