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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 ...
On 29 September, Windlass began dragging the bottom with a "hawk" anchor and, on 6 October, located the self-propelled seaplane wrecking derrick on the bottom, upside down. Despite a period of "unusually adverse weather" and what Windlass' command history termed "the usual salvage job setbacks," Windlass raised YSD-68 early in November.
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 ...
A windlass cocking mechanism on crossbows was used as early as 1215 in England, and most European crossbows had one by the Late Middle Ages. [6] Windlasses are sometimes used on boats to raise the anchor as an alternative to a vertical capstan (see anchor windlass). The handle used to open locks on the UK's inland waterways is called a windlass.
A stream anchor, which is usually heavier than a kedge anchor, can be used for kedging or warping in addition to temporary mooring and restraining stern movement in tidal conditions or in waters where vessel movement needs to be restricted, such as rivers and channels. [43] Charts are vital to good anchoring. [44]
As well as dropping the anchor in position, the longboat would often be used for weighing (raising) the anchor after use. To do this, a windlass was usually fitted amidships and a davit in the stern (or sometimes the bow) to provide a fair lead from the buoy rope [a] or cable to the windlass. A substantial degree of buoyancy was needed in the ...
In 1963 the ship was refitted with a diesel engine to replace her original steam engine and boiler, to increase automobile capacity. As steam was still required to operate deck winches and the anchor windlass, a vapour steam generator, similar to those used on railway
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 ...
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