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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.
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 ...
An anchor is a device, normally made of metal, used to secure 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 (ankȳra). [2] [3] Anchors can either be temporary or permanent.
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.
Portable winch, used in the Albert Dock, Liverpool. Many dockyards used small portable jiggers mounted on wheeled carriages. These could be moved around the quays as needed, and plumbed into outlets in the hydraulic mains with screwed pipe unions. They were used as portable winches for all manner of tasks. A typical task would be winching bales ...
A logging donkey consists of a steam boiler and steam engine, [5] [6] connected to a winch mounted on a sled called a donkey sled. [7] [8] The donkeys were moved by simply dragging themselves with the winch line, originally hemp rope and later steel cable. They were used to move logs, by attaching lines to the logs and hauling them. [9] [10]