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Worlds fastest roughneck connection with cathead
A cathead is a large wooden beam located on either side of the bow of a sailing ship, and angled forward at roughly 45 degrees. The beam is used to support the ship's anchor when raising it (weighing anchor) or lowering it (letting go), and for carrying the anchor on its stock-end when suspended outside the ship's side. It is furnished with sheaves at the outer end, and the inner end (which is called the cat's-tail) fits down on the cat-beam. The cat stopper also fastens the anchor on. The purpose of the cathead is to provide both a heavy enough beam to support the massive weight of the anchor, and to hold the metal anchor away from the wooden side of the ship to prevent damage.
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In common practice, the projecting end of the beam was carved to resemble the face of a lion or cat. Whether such carving was due to a play on the already existing name of the beam or whether the beam was so named because of the practice of such carving is unknown.
The origin of the term "cathead" is obscure, but dates at least to the 17th century used by mainwaring and boteler in their dictionaries.
In Robert Charles Leslie's Old Sea Wings, Ways and Words in the Days of Oak and Hemp (1890), page 154 he writes: "The term catheads used for the two stout projecting timbers on either bow, from which the anchor hung clear of the ship before letting go, was no doubt connected with the fact of a lion or large cat usually carved upon the end of the item."
Additional nautical use of the term
A second "cat head" was associated with a ship's anchor-cable and windlass. This was a square pin thrust into one of the handspike holes of a ship's windlass. When at anchor, the anchor rope (called a cable or catfall) was secured to this with a smaller rope tie called a seizing. The English term for this pin was 'Norman'. In German, however, it was called a Kattenkopf (cat-head), and in this case it is a reference to the traditional way the top was notched and chamfered off so that in cross section, it resembled the ears of a cat.