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The combined port anchor windlass and winch of the modern ferry Stena Britannica. The hydraulically operated brake and pawl allows the anchor to be dropped from the ship's bridge. [citation needed] A windlass is a machine used on ships that is used to let-out and heave-up equipment such as a ship's anchor or a fishing trawl. On some ships, it ...
Capstan winches were also important on sailing trawlers (e.g. Brixham trawlers) as a means for fetching in the nets after the trawl. When they became available, steam powered capstan winches offered a great saving in effort. These used a compact combined steam engine and boiler below decks that drove the winch from below via a shaft.
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]
The reference load used in the design and testing of the towing winch is twice the static bollard pull. Even if AHTS-vessels are customized for anchor-handling and towing, they can also undertake, for example, ROV (remotely operated underwater vehicle) services, safety/rescue services, and supply duties between mainland and offshore installations.
An anchor secured to the ship's side. The projecting beam the anchor hangs from when not secured is a cathead (left). The anchor has a stock (cross-piece, in this case wooden) below, and curved flukes above (end-on); the shank is the near-vertical metal bar running between them, lashed with the shank painter Cathead on bow of the barque James Craig; the cat tail protrudes onto the deck and is ...
The yacht Reliance, American defender of the 1903 America's Cup, was the first racing boat to be fitted with modern winches below decks. The Reliance's competitors relied on muscle power using topside mounted capstans and windlasses , which would soon be replaced in most applications by winches, including on fishing boats , where they are used ...