Skin Girth

{{unreferenced, date=January 2018 Chain and skin girth

Skin girth is a measurement of a

yacht A yacht is a sailing or power vessel used for pleasure, cruising, or racing. There is no standard definition, though the term generally applies to vessels with a cabin intended for overnight use. To be termed a , as opposed to a , such a pleasu ...

hull Hull may refer to: Structures * Chassis, of an armored fighting vehicle * Fuselage, of an aircraft * Hull (botany), the outer covering of seeds * Hull (watercraft), the body or frame of a ship * Submarine hull Mathematics * Affine hull, in affi ...

. Skin girth is specified in some design rules to handicap or match the capabilities of sailing vessels of similar design such as the

12 metre The 12 Metre class is a rating class for racing sailboats that are designed to the International rule. It enables fair competition between boats that rate in the class whilst retaining the freedom to experiment with the details of their designs. ...

boats. Skin girth is measured by following the surface of the hull from a given elevation on the hull vertically from a specified fore-and-aft position. It differs from the chain girth (see convex hull) which follows the skin on convex surfaces, but goes straight across the chord of concave surfaces, as a tight chain would. Nautical terminology