page_title: Anchor
section_title: Recent designs
hierarchical_section_title: Anchor / Small boat anchors / Recent designs
caption_attribution_description: English: Knox Anchor
context_page_description: An anchor is a device, normally made of metal, used to connect a vessel to the bed of a body of water to prevent the craft from drifting due to wind or current. The word derives from Latin ancora, which itself comes from the Greek ἄγκυρα.
  Anchors can either be temporary or permanent. Permanent anchors are used in the creation of a mooring, and are rarely moved; a specialist service is normally needed to move or maintain them. Vessels carry one or more temporary anchors, which may be of different designs and weights.
  A sea anchor is a drogue, not in contact with the seabed. It is used to control a drifting vessel, or to slow and help steer a sailing yacht running before a storm.
context_section_description: In recent years there has been significant progress in anchor design. Primarily designed to set very quickly, then generate high holding power, these new generation anchors (mostly proprietary inventions still under patent) are becoming popular with users of small to medium-sized vessels.
  Bügelanker, or Wasi: This German-designed bow anchor has a sharp tip for penetrating weed, and features a roll-bar which allows the correct setting attitude to be achieved without the need for extra weight to be inserted into the tip.
  Bulwagga: This is a unique design featuring three flukes instead of the usual two. It has performed well in tests by independent sources such as American boating magazine Practical Sailor.
  Knox Anchor: This is produced in Scotland and was invented by Professor John Knox. It has a divided concave large area fluke arrangement and a shank in high tensile steel. A roll bar similar to the Rocna gives fast setting and a holding power of about 40 times anchor weight.
  Rocna: This New Zealand spade design, available in galvanised or stainless steel, has been produced since 2004. It has a roll-bar (similar to that of the Bügel), a large spade-like fluke area, and a sharp toe for penetrating weed and grass. The Rocna sets very quickly, holds well, and has become the best-selling anchor for yachts and workboats.
  Mantus: This is a fast setting anchor with high holding power, it is designed as an all round anchor capable of setting even in challenging bottoms such as hard sand/clay bottoms and grass. The shank is made out of a high tensile grade of steel capable of withstanding high loads; post-marketing reports have documented sailors who have ridden out hurricanes successfully on an appropriately sized mantus anchor. It is similar in design to the Rocna but has a larger and wider roll-bar that reduces the risk of fouling and increases the aggressive angle of the fluke which results in improved penetration; it consistently outperforms older style anchors on most measures, such as CQR, Delta, Bruce/Claw and even the Rocna.
  Spade: This is a French design which has proved successful since 1996. It features a demountable shank (hollow in some instances) and the choice of galvanized steel, stainless steel, or aluminium construction, which means a lighter and more easily stowable anchor.
  Ultra: This is an innovative spade design that dispenses with a roll-bar. Made primarily of stainless steel, its main arm is hollow, while the fluke tip has lead within it.
  Vulcan: A recent sibling to the Rocna, this anchor performs similarly but does not have a roll-bar. Instead the Vulcan has patented design features such as the "V-bulb" and the "Roll Palm" that allow it to dig in deeply. The Vulcan was designed primarily for sailors who had difficulties accommodating the roll-bar Rocna on their bow. Both Vulcans and Rocnas are available in galvanised steel, or in stainless steel.
caption: Knox Anchor
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