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Wednesday, March 18, 2020 

Damen Marine Components (DMC) has won an order for three sets of steering and rudder systems for three dual-fuelled trailing suction hopper dredgers (TSHDs) currently being built at Keppel Offshore & Marine’s shipyard in Singapore for Van Oord.

The vessels will be 138m in length and have a hopper capacity of 10,500m³. They are designed to represent the latest in sustainable, energy-efficient dredging and two are due for delivery in 2021. The third will be handed over the following year.

Each vessel will have two Van der Velden Commander piston-type steering systems and two Van der Velden Master Rudders with fish-tail design bulb. The Commander piston-type guarantees reliability with an in-house cylinder design and is available in a range of options with regard to rudder stock connections, rudder angles and cylinders. This simplifies the installation process and reduces the amount of space required.

The Master Rudder offers high manoeuvrability and has a specifically designed, high performance, fish tail profile that can be optimised to suit a wide range of vessels, being particularly suited to operation in shallow waters. The rudders for Van Oord’s TSHDs will have an area of approximately 14m², be class approved by Bureau Veritas for speeds of up to 15 knots and generate a torque of 270kNm.

Each rudder will be executed with a rudder bulb, to improve the propeller wake field, thereby saving energy and reducing fuel consumption, and increasing thrust at higher loads.

"The robust design and manufacturing will ensure uninterrupted operation despite the harsh operating environment. The rudder profile has been optimised during model tests for best manoeuvring performance at low speed and shallow water," said Bogdan Mocanu, Area Sales Manager, DMC.

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