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The weight of the anchor chain can be more than that of the anchor and is critical to proper holding. Permanent moorings use large masses (commonly a block or slab of concrete) resting on the seabed. Semi-permanent mooring anchors (such as mushroom anchors ) and large ship's anchors derive a significant portion of their holding power from their ...
The anchor is shackled to the anchor cable (US anchor chain), the cable passes up through the hawsepipe, through the pawl, over the windlass gypsy (US wildcat) down through the "spurling pipe" to the chain/cable locker under the forecastle (or poop if at the stern (US fantail)) - the anchor bitts are on a bulkhead in the cable locker and the bitter end of the cable is connected to the bitts ...
A slender simple style version of the Cable or Anchor chain with small, uniform circular or oval links. Trace chains are typically very delicate, especially in finer widths. [18] [15] Venetian: Venetian chains are very similar to Box chain, but the links are always square, whereas the Box chains are loser and rectangular. [18]
A common metal short-link chain Roller chains. A chain is a serial assembly of connected pieces, called links, typically made of metal, with an overall character similar to that of a rope in that it is flexible and curved in compression but linear, rigid, and load-bearing in tension.
Anchor channels, invented by Anders Jordahl in 1913, are steel channels cast flush in reinforced concrete elements to allow the installation of channel bolts for the fastening of components. Anchor channels consist of steel C-shaped channels and anchors (mostly headed studs ) which are connected to the channel by welding or riveting/forging.
In August 1910, N. Hingley & Sons completed an anchor for the White Star liner, Olympic. [14] It was claimed that the anchor was the biggest ever produced, weighing 15 tons 5 + 1 ⁄ 4 cwt, with length 19 ft and width 10 ft. In 1911, the company manufactured the anchors and chain for the ocean liner RMS Titanic.
Frenchman Alain Poiraud developed the "Spade" anchor in the 1990s, a huge leap in performance over any types which proceeded it. The Spade was the first anchor to successfully make use of a concave fluke, which provides the greatest efficiency (as opposed to the convex "plow" type of the CQR, or the flat "plate" type of the Danforth).
This photo shows the anchor chain running through a ship's hawsepipe. Hawsepiper is an informal maritime industry term used to refer to a merchant ship's officer who began his or her career as an unlicensed merchant seaman and did not attend a traditional maritime college or academy to earn an officer's license. The term is almost exclusively ...