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Friday, May 17, 2019 

Singaporeís Keppel Offshore & Marine shipyard has launched Jan De Nul Groupís fourth ultra-Low emission trailing suction hopper dredger.

Sanderus is the first of two identical medium-sized hopper dredgers fitted with a two-stage filtering technique for exhaust gases.

In total, Jan De Nul Group designed six ultra-low emission vessels (ULEvs) for its fleet: five Trailing Suction Hopper Dredgers and one Offshore Jack-Up Installation Vessel, Voltaire. The two 6,000m³ hoppers and the Voltaire are still under construction. Three 3,500m³ ULEvs, of which the first was launched in July 2018, recently left Keppel O&M’s shipyard in China on their maiden voyage to their first assignment.

Combining a shallow draught with high manoeuvrability, Sanderus is diesel-electric driven: all major drives (thrusters, dredge pump, jet pumps) are electrically driven, and controlled by means of frequency converters. In this way each system can operate at its optimal speed and power.

Power is generated by means of three diesel generator sets. A control system automatically starts and stops the sets depending on the power requirement. Asymmetric load sharing results in optimal load distribution over the diesel generator sets. All these measures result in a low fuel oil consumption, which is the best in its class.

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