Neither Wet nor Wild - Boat Hulls

Maximum Punch: A stepped hull — identified by the notches in the chine — reduces drag for speed and efficiency.
Down and Back: Modifications to chines and strakes can effect a drier ride at speed, as well as improve handling and control characteristics.
Last Third: Most modern planing hulls ride on the aft portion, so quality design aims to get the hull on plane easily, where it can run most efficiently.