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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 ...
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 ...
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 ...
On 28 January 1989, Mohawk worked with USNS Grasp to pull the grounded USS Spruance off a coral reef near Andros Island, in the Bahamas. [ 15 ] Public tours of Mohawk were offered on 24–25 March 1990 at the Port Canaveral Seafood Festival, [ 16 ] on 19 May 1991 at the Washington Navy Yard , [ 17 ] and in October 1992 as part of the Wilmington ...
A tugboat is typically rated by its engine's power output and its overall bollard pull. The largest commercial harbour tugboats in the 2000s–2010s, used for towing container ships or similar, had around 60 to 65 short tons-force (530–580 kN) of bollard pull, which is described as 15 short tons-force (130 kN) above "normal" tugboats. [5] [6]
The NLTs have much increased power at 60 metric tons (59 long tons; 66 short tons) of bollard pull and Azimuth stern drive propulsion with 4,988 horsepower (3,720 kW) per side. [1] The NLTs will measure 24.40 metres (80 ft 1 in) long overall with a moulded beam of 11.25 metres (36 ft 11 in) and a draught of 5.40 metres (17 ft 9 in).
Since Aiviq is an anchor handling tug and supply vessel, she is fitted with a large towing winch located amidships as well as chain lockers and storage tanks for both liquid and dry bulk cargo under the main deck. [60] Her gross tonnage is 12,892, net tonnage 3,867 and deadweight tonnage 4,129 tonnes. [1]
One of the missions of a fleet tug was to tow damaged warships back to port. She is equipped with a SMATCO 66 DTS-200 towing winch for service as a towboat. [ 2 ] The towing system can accommodate either wire rope or synthetic-fiber hawsers and produce as much as 90 short tons of bollard pull .
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