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VIDEO: Damen’s second MAD 3500 dredge enters service

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The vessel features Damen Offshore Bow which fully encloses the foredeck, protecting gear and cargo while providing excellent sea-keeping.

The second vessel of Damen’s new Marine Aggregate Dredge (MAD) 3500 class, the Hansen Thameshas now completed sea trials and entered service with her owner, building materials supplier Hanson UK, replacing an obsolete vessel.

When designing the new class of aggregate dredgers, Damen sought input from experienced operators in the industry as well as its own repair yards, which have serviced dredges for many years, and its production subsidiary dredging mission equipment. As a result, while the new design is similar in size to its 20th century equivalents, the MAD 3500 is an all-new class which Damen describes as a “leap forward”, both in the amount of product it can transport (20% more) and reduces operating costs per ton.

These are achieved not only by the latest propulsion systems offering greater fuel economy, but also by the ability to perform operations while running on a single engine. It is also designed to operate 24 hours a day, 7 days a week, with just nine crew members. At any time, dredging can take place with only two people on deck plus an engineer on duty. Unloading the entire ship can be completed in just two to three hours and is fully automated.

With serviceability built into the vessel from the earliest stages, operability is maximized. This is achieved in part through the use of modular systems which allow defective components to be replaced with new ones while the defective unit is returned for testing and repair. Additionally, Damen’s Triton remote monitoring and analysis system enables continuous optimization and preventative maintenance, using ship-wide sensors to provide operational data to the bridge and shore managers for analysis. in real time.

Key technologies onboard the MAD 3500 include a modular screen tower that sorts materials brought up from the seabed as they come on board.

BUILDING THE HANSON THAMES

the Hanson Thames began construction at Damen Shipyards Galati, Romania in late 2019 and, while based on the original MAD 3500 design, benefited from the experience already gained from an earlier build and underwent some adjustments to meet its own specific operational requirements.

the Hanson ThameIts was launched at Damen Galati in September 2020 with COVID-19 at its peak. The project was completed with minimal disruption thanks to the proximity of many suppliers and subcontractors.

Key technologies on board the MAD 3500 include a modular screening tower that sorts materials brought up from the seabed as they come on board rather than once they reach land. This allows it to retain only the requested shades while returning the rest to the seabed.

The dredge also includes the Damen Offshore Bow. This fully encloses the foredeck, protecting gear and cargo while providing excellent sea-keeping. 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 masts allows the MAD 3500 to maintain its position without the use of lines or the need for constant adjustment.