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Aiviq is an American icebreaking anchor handling tug supply vessel (AHTS) built in 2012 to support oil exploration and drilling in the Chukchi Sea off Alaska.The vessel's primary task was towing and laying anchors for drilling rigs, and oil spill response.
Boats are moored on buoys, on fixed or floating walkways tied to an anchoring piling by a roller or ring mechanism (floating docks, pontoons). Buoys are cheaper to rent but less convenient than being able to walk from land to boat. Harbor shuttles (water taxis) or launches, may transfer people between the shore and boats moored on buoys.
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 machinery is specifically designed for anchor handling operations. They also have arrangements for quick anchor release, which is operable from the bridge or other normally crewed locations in direct communication with the bridge. The reference load used in the design and testing of the towing winch is twice the static bollard pull.
The tensioned portion of the rope would fasten the ship to the quay, hoist a foresail, lift a spar into position on the mast or be used to transfer cargo to or from a dock or lighter. A capstan is a vertical- axled rotating machine developed for use on sailing ships to multiply the pulling force of sailors when hauling ropes, cables , and hawsers .
Multiple anchor mooring systems use two or more (often three) light weight temporary-style anchors set in an equilateral arrangement and all chained to a common center from which a conventional rode extends to a mooring buoy. The advantages are minimized mass, ease of deployment, high holding-power-to-weight ratio, and availability of temporary ...