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Bollard pull is a conventional measure of the pulling (or towing) power of a watercraft.It is defined as the force (usually in tonnes-force or kilonewtons (kN)) exerted by a vessel under full power, on a shore-mounted bollard through a tow-line, commonly measured in a practical test (but sometimes simulated) under test conditions that include calm water, no tide, level trim, and sufficient ...
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 ...
Toggle the table of contents. Turva. 4 languages. Čeština; ... Cost € 97 million (US$ ... With a bollard pull of approximately 100 tonnes, ...
Bollard pull can increase up to 30% with ducts. With decelerating ducts, the circulation opposite of the Kort nozzle, resulting in a negative thrust of the duct. This type is used for high speed vessels with increased exposure to cavitation and vessels that want to reduce noise levels, such as warships.
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.
In the tests, the much smaller tug was attached to the stern of the icebreaker to determine its bollard pull while the icebreaker towed it at different speeds. [ 22 ] As of 2013 [update] , Otso and Kontio are the last Finnish icebreakers designed solely for escorting merchant ships through ice-infested waters. [ 5 ]
The same type of "weigh bar" can be used to measure horizontal loads and "drawbar pull" of wheeled/tracked or vehicles or "bollard pull" of boats or the "thrust" of jet engines when a proper "test rig" is designed and constructed to provide "frictionless" fore-aft movement of the load relative to the weigh bars.
Mellum: 5 nmi (9.3 km) southwest off Heligoland, bollard pull of 100 t [12] Neuwerk: 5 nmi (9.3 km) southwest off Süderoogsand (Nordfriesland), bollard pull of 113 t [13] Baltic Sea. Bülk: Kiel Fjord, bollard pull of 40 t [14] Scharhörn: Hohwacht Bay (between Kiel and Fehmarn), bollard pull of 40 t [15] Baltic: Warnemünde, 127 t of bollard ...
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