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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 ...
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 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 ...
Tourists turn a capstan. 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.
The IRS class of tugboats are a series of Bollard pull tugboats built by Hindustan Shipyard Limited, Visakhapatnam, for the Indian Navy.. INS Sahas and INS Dhiraj tugs were flagged off by Commander (retd) K.S. Subramanian, the Director (shipbuilding) and INS Himmat was flagged off by Rear Admiral (Retd) N K Mishra, NM Chairman & Managing Director of HSL.
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 towing system could accommodate either wire rope or synthetic-fiber hawsers and produce as much as 90 short tons of bollard pull. [7] [6] She had a 10-ton capacity crane for moving loads on the aft deck. [5] There were connections to bolt down shipping containers and other equipment. Like all MSC ships, Mohawk was crewed by civilian ...
The towing system could accommodate either wire rope or synthetic-fiber hawsers and produce as much as 90 short tons of bollard pull. [9] [10] [11] They had a 10-ton capacity crane for moving loads on the aft deck. [8] There were connections to bolt down shipping containers and other equipment.