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  2. Anchor - Wikipedia

    en.wikipedia.org/wiki/Anchor

    Holding ground is the area of sea floor that holds an anchor, and thus the attached ship or boat. [4] Different types of anchor are designed to hold in different types of holding ground. [5] Some bottom materials hold better than others; for instance, hard sand holds well, shell holds poorly. [6] Holding ground may be fouled with obstacles. [6]

  3. History of the anchor - Wikipedia

    en.wikipedia.org/wiki/History_of_the_Anchor

    Bruce Anchor Co has its primary role in the very large anchor business, producing mooring anchors and permanent installation types for heavy industry, such as oilrigs. On the back of this reputation, the Bruce small boat anchor type was initially very successful, and represented some significant improvements over the CQR. It is no longer produced.

  4. Sea anchor - Wikipedia

    en.wikipedia.org/wiki/Sea_anchor

    A conical sea anchor with tripline (from an illustration in The Sailors Handbook by Halsey C. Herreshoff). An early wooden drogue. A sea anchor (also known as a parachute anchor, drift anchor, drift sock, para-anchor or boat brake) is a device that is streamed from a boat in heavy weather. Its purpose is to stabilize the vessel and to limit ...

  5. Offshore embedded anchors - Wikipedia

    en.wikipedia.org/wiki/Offshore_embedded_anchors

    A deep-penetrating anchor (DPA) is conceptually similar to a torpedo anchor: it features a dart-shaped, thick-walled, steel cylinder with flukes attached to the upper section of the anchor. A full-scale DPA is approximately 15 metres (49 ft) in length, 1.2 metres (4 ft) in diameter, and weighs on the order of 50–100 tonnes (49–98 long tons ...

  6. Ship's boat - Wikipedia

    en.wikipedia.org/wiki/Ship's_boat

    Cockboat, an early type of ship's boat, existing in 1485 (and probably some time before). Where a ship was equipped with three boats, the cockboat was the one of middle size, the others being the great boat (the largest) and the jollywatt. The larger two boats were equipped for laying out anchors. All three had sails as well as oars. Admiral's ...

  7. Drogue - Wikipedia

    en.wikipedia.org/wiki/Drogue

    Most drogues are best deployed out of sync with the boat by one-half of the length of the prevailing waves; thus the drogue climbs a wave when the boat slides down a wave. Nylon rope is widely used for hauling drogues since it best absorbs the shock loading by stretching. However, new research indicates that using a rope with less stretch ...