Cross sections from amidships are usually what you will see in a manufacturer's catalog. Hull cross sections will show to what degree a hull is rounded, flat, or V-shaped. The more abrupt the angle, the harder the chine. Boats with softer chines have a less abrupt angle, gradually curving from their bottom to their topside. Flare is usually added at the bow for lift and drier rides, or along the sides for increased stability.
Rocker denotes the curve of the hull from fore to aft.
The more rockered a hull, the greater its maneuverability. Rocker shortens the waterline length and thus reduces efficiency and directional stability, or tracking. Inc. All rights reserved.