Chain girth is a

measurement Measurement is the quantification of attributes of an object or event, which can be used to compare with other objects or events. In other words, measurement is a process of determining how large or small a physical quantity is as compared ...

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 ...

. Chain 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. Chain girth is measured as a straight line from a given elevation on the hull near the

waterline The waterline is the line where the hull of a ship meets the surface of the water. Specifically, it is also the name of a special marking, also known as an international load line, Plimsoll line and water line (positioned amidships), that indi ...

vertically from a specified fore-and-aft position and diagonally as viewed from the bow to a point on the hull near the keel. It differs from the

skin girth {{unreferenced, date=January 2018 Skin girth is a measurement of a yacht hull. 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 boats. Skin girth is mea ...

which is measured following the surface of the hull.

External links

Current Class Rules for 2.4M boats - note appendix section H
Nautical terminology