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Wednesday, September 29, 2021 

Schottel says it has been selected to equip the largest US-flagged, self-propelled trailing suction hopper dredger (TSHD) Frederick Paup with three SRP 510 LFP rudder propellers.

The dredger will be owned and operated by Manson Construction, and is currently under construction at the Keppel AmFELS Shipyard in Brownsville, Texas. It will be 128m in length, have a 25m breadth and about 9m draught, and will have a hopper volume of 11,500m3. The vessel will represent Manson’s single biggest investment in its 116-year history.

Jordan Brown, Project Manager, Manson Construction, said: “The Frederick Paup will set a new benchmark in the US hopper dredge market. The innovations include many aspects of improved ship design as well as specific demands regarding automation, machinery, and equipment. Schottel was able to meet these requirements as the thrusters will optimally support our vision of top performance in terms of mounting, thrust and manoeuvrability.”

Hockema Group created a well-elaborated hull design concept that allows for the propulsion system to be integrated in an exceptional manner. The aft appendages are optimally tailored to the rudder propellers in order to supply the thrusters with the lowest-possible turbulence flow. The three Schottel RudderPropellers are powered by diesel-electric drives and feature propeller diameters of 2.8m and a power intake of 2,240kW each. A particularly long propeller arm length allows for an arrangement at the stern in portside, centre and starboard position with convenient access for future maintenance.

The 360-degree steerable SRPs will enable the Frederick Paup to benefit from maximum manoeuvrability, course stability during free sailing, and powerful thrust in the chosen direction. Besides the nozzles featuring enhanced corrosion protection with ProAnode, the RudderPropellers will be equipped with the DNV type-approved Schottel LeaCon sealing system. Considered a non-oil-to-water interface, the system complies with the VGP regulations of the US Environmental Protection Agency (EPA).

Frederick Paup, named after Manson’s Chairman of the Board, will be built to the requirements of ABS. The vessel is scheduled to enter operation in 2023 and will support the US Army Corps of Engineers in maintaining marine transportation highways primarily along the Gulf Coast and Atlantic Coast.

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