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  • 2022 February 8 13:41

    Damen’s second Marine Aggregate Dredger 3500 enters service

    The second vessel of Damen’s new Marine Aggregate Dredger (MAD) 3500 class has now completed her sea trials, according to the company's release. As of January 2022, she has entered service with her owner, Hanson UK, a leading supplier of building materials to the UK market, replacing an obsolete vessel.

    With a large part of the English dredging fleet that is now several decades old, the MAD 3500 presents an opportunity to other operators in this sector. It enables them to take advantage of the major advances made in aggregate dredging design and technology, and the efficiencies that come with it, via a proven format from a leading shipbuilder.

    The design team at Damen sought input from experienced operators in the sector as well as from its own repair yards, which have been maintaining dredgers for many years, and its dredging mission equipment production subsidiary. These, together with its own ship design and building capabilities, makes Damen a one-stop-shop for all things dredging.

    As a result, while the new design is similar in size to its twentieth century equivalents, the MAD 3500 is a completely new class that is a quantum leap ahead, both in the quantity of product it can carry (20% more) and operational costs per tonne.

    These are achieved not only by the latest propulsion systems delivering greater fuel economy, but also their ability to conduct operations while running on a single engine. It is also designed to operate 24/7 with just nine crew. At any one time, dredging can take place with only two personnel on the bridge plus an engineer on duty. Unloading the entire vessel can be achieved in just two to three hours and is fully automated.

    With ease of maintenance designed into the vessel from the earliest stages, operability is maximised. This is achieved partly through the use of modular systems that allow faulty components to be swapped out for new ones while the defective unit is sent away for testing and repair. This in turn is supported and enhanced by the use of Damen’s Triton remote monitoring and analysis system that enables continuous optimisation and pre-emptive maintenance.

    This is achieved using ship-wide sensors to deliver operational data to both the bridge and managers onshore for real-time analysis. Building the Hanson Thames The Hanson Thames began her build at Damen Shipyards Galati at the end of 2019 and, while being based on the original MAD 3500 design, she benefited from the experience already gained from an earlier build and had some adjustments to meet her own particular operational requirements.

    Damen has always maintained the ethos of combining standardisation where possible with customisation where required, and the MAD 3500 class can be modified to meet the needs of individual operators without any loss in performance. Key technologies on board the MAD 3500 include the modular screening tower which allows material brought up from the seabed to be sorted as it comes aboard rather than once it reaches land. This enables it to retain only the grades that are in demand while returning the rest to the seabed. This makes it yet more efficient and profitable.

    Another is the application of the Damen Offshore Bow. This fully encloses the foredeck, protecting equipment and cargo as well as delivering excellent seakeeping. The mooring system also sets a new standard. It is designed around flow lines to ensure safe and efficient mooring at all times, and the addition of telescopic spud poles enables the MAD 3500 to hold position without the use of lines or the need for constant adjustment.

    The Hanson Thames was launched at Damen Galati Shipyard in September 2020 and, with COVID-19 at its height. The project was successfully completed with minimal disruption aided by the close proximity of many of the suppliers and sub-contractors. South coast service hub for UK vessels To support the Hanson Thames and other Damen vessels, Damen has recently established a Service Hub in the nearby Port of Southampton to enable it to provide full, through-life support and to act as a  repository of knowledge as well as critical components regarding these specialised vessels.

    With much of the existing North Sea fleet of aggregate dredgers due to be retired soon, and many of them based in the UK, the value of this resource is expected to grow over time. 

    Damen Shipyards Group

    Damen Shipyards Group has been in operation for over ninety years and offers maritime solutions worldwide, through design, construction, conversion and repair of ships and ship components. By integrating systems we create innovative, high quality platforms, which provide our customers with maximum added value. Damen operates 35 shipyards and 20 other companies in 20 countries, supported by a worldwide sales and service network. Damen Shipyards Group offers direct employment to more than 12,000 people.




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