Various Types of Chine Hulls
The simplest type of chine construction would be the single chine "V" shape, with two flat panels joined at the keel (A). This type of hull is among the simplest to build, but due to the lack of stability of a narrow "V" and the lack of freeboard on a wide "V", single chine hulls are generally only seen on multihull sailboats, which often use two deep "V" shaped hulls connected by akas to provide mutual stability.
The two chine hull (B), with a flat bottom and nearly vertical sides, was the first hard chine design to achieve widespread use. This design provides far more stability than the single chine hull, with minimum draft and a large cargo capacity. These characteristics make the two chine hull popular for punts, barges, and the scows.
The three chine hull (C) is probably the most common hard chine hull. Having a shallow "V" in the bottom and near-vertical panels above that, it approximates the shape of traditional rounded hull boats fairly well, and is common even in fiberglass designs where employing chines offers no advantage in construction.
Designs with higher numbers of chines (D), often just called multichine hulls, are also common. Kayaks, in particular, are often composed of many chines, required for the complex shapes needed to provide good performance under various conditions. By increasing the number of chines, the hull can very closely approximate a round bottomed hull.
It is possible to refer to the different hulls by the numbers of the flat panels that make up the boat. Thus A is a two-panel boat, B is a three-panel boat, C is a four-panel boat and D is an eight-panel boat.
Read more about this topic: Chine (boating)
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