Category Archives: AHTS

Anchor Handling Tug Supply (AHTS) vessels are mainly built to handle anchors foroil rigs, tow them to location, anchor them up and, in a few cases, serve as an Emergency Rescue and Recovery Vessel (ERRV).

AHTS vessels differ from Platform supply vessels (PSVs) in being fitted with winches for towing and anchor handling, having an open stern to allow the decking of anchors, and having more power to increase the bollard pull. 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 manned location 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.

Rolls-Royce Secures Deck Machinery Contract for Tugs

Rolls-Royce has been awarded a £19m contract to deliver deck machinery for four ocean going tugs, designed by Ulstein Design & Solutions, for Dutch company ALP Maritime Services.

The vessels will be constructed in Japan by Niigata Shipbuilding & Repair.

The vessels are being developed for towing large structures like oil rigs and floating production units over long distances. The bollard pull for each of the four vessels will be 300 tons and they will be equipped for anchor handling.

John Knudsen, Rolls-Royce, President Offshore, said: “This project is a good example of how our solid industry know-how makes us a partner of choice for innovative ship owners and design  teams. The new vessels will place ALP Maritime Services in the elite division for large offshore towing operations across the world.”

The deck machinery delivered from Rolls-Royce will include a complete low pressure winch solution and a stern roller. The towing/anchor handling winches are specially developed in cooperation with the ship designer and owner. The supply of rudder and steering gear is also included in the Rolls-Royce scope.

Intended for world-wide operations, the vessels will be delivered from Japan by Q1 2016. They will be of Ulstein design SX157, developed especially for this project.

Tore Ulstein, Ulstein Group, Deputy CEO, said: “This is a very important contract involving activities in a new market for us and with a new customer. The contract is a result of close cooperation with the shipyard, the ship owner and our partners in the Norwegian maritime cluster, a cooperation we will work to develop further in the years to come.”

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Chevron Canada Charters Magne Viking AHTS

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Viking Supply Ships, one of TransAtlantic’s two business areas, has with the AHTS-vessel Magne Viking been awarded a term contract by Chevron Canada Ltd for operations on one well.

The contract is on subject and is not yet fully signed by the parties. The well support operations are estimated to last between 150 and 180 days and the charter will commence during the third quarter 2012. The vessel is going to support the drill ship Stena Carron with supply duties, anchor handling, towing, stand-by and rescue services, passenger movement and ice berg management.

Magne Viking is especially designed for subarctic operations and harsh weather conditions. The crew on board is especially trained for working in cold environments and has extensive experience from iceberg management from Greenland. The vessel is ice classed, which is a requirement for operating in Canadian waters, and will be upgraded to a full stand-by class in accordance with Canadian regulations. Magne Viking is furthermore equipped with de-icing systems, fire-fighting, oil recovery, large accommodation and safe deck handling.

The total contract value is estimated at about CAD 11.1 million.

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UK: Rolls-Royce Equipment for Iceman AHTS

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Rolls-Royce, the global power systems company, has been awarded a £15 million contract by STX OSV to supply an extensive deck equipment package for an advanced anchor handling vessel to be operated by Iceman AS.

The package, which is designed to improve operational safety, will include a new anchor handling frame (AHF) and a hydraulic anchor winch, which is capable of pulling 500 tonnes. It will also feature anchor handling cranes and systems to ensure controlled management of wires and chains when pulling heavy loads.

Arne Tande, Rolls-Royce, Senior Vice President – Offshore Deck Machinery said: “This latest contract cements Rolls-Royce’s position as the market leader in anchor handling equipment. We supply world leading technology which enables safer and more efficient operations in deep water oil fields.”

As the exploration and production for oil and gas moves towards deeper waters, mooring lines become heavier, more difficult and more hazardous to handle. The new AHF is designed to reduce the handling forces and wire tension during anchor deployment and retrieval operations, while also minimizing the human exposure to hazardous operating conditions. The AHF is mounted at the stern of the vessel to ease the deployment and recovery of anchors. It makes it simpler to deck the anchor with correct orientation and without repeated efforts or assistance from other vessels.

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India: Cochin Shipyard Delivers New AHTS to SCI

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Cochin Shipyard Limited (CSL) delivered a 120T Bollard pull Anchor Handling Tug Supply Vessel (AHTS), “SCI Kundan”, to M/s Shipping Corporation of India, Mumbai (SCI). This is the Second of the series of 4 Nos of 120T Bollard pull AHTS being built by CSL for M/s Shipping Corporation of India.

The vessel is of AH03 type, designed by STX OSV, Norway (ex- Aker Yards) and is certified under dual class by the Rules and Regulations of American Bureau of Shipping & Indian Register of Shipping and is registered under Indian flag.

This 65.2 x 16.0 Meter vessel is a high end Anchor handler with a capacity of 120 T Bollard pull which is equipped with 2 Nos of 4000 KW Diesel Engines  and 2 Nos of Controlled pitch propeller in Kort Nozzles. The vessel is having Grade I Dynamic Positioning feature along with compliance to ERRV class ‘C’ and also having capability of Fire Fighting class I.

The vessel is built to accommodate 29 persons with all the capabilities of a Platform Supply Vessel in addition to the Anchor Handling facility. These vessels are used as support platforms to Rigs/Oil platforms. The shipyard is presently constructing another 4 nos of offshore vessels for M/s Shipping Corporation of India which are all in advanced stages of construction.

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Brazil: DOF Extends Contract with OGX for AHTS Skandi Mogster

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DOF has agreed a new 2 year contract with OGX for Skandi Møgster in Brazil. The new contract with OGX will commence in March 2012.

Skandi Møgster, built by Kværner Kleven Leirvik in 1998, is an AHTS with 16.000 BHP and 192 T Bollard Pull.

The DOF group operates within three different segments in relation to strategic types of activities and vessel types. The groups technical diversified fleet consists of innovative vessels specialized for their operational purpose.

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