Boskalis Orders Two Trailing Suction Hopper Dredgers04/12/2007 |
| Dredging company Royal Boskalis Westminster nv has placed an order with shipyard IHC Holland for the construction of two innovative 12,000m³ hoppers. The order is part of the multi-year fleet expansion program at Boskalis. The ships will be completed in December 2009 and April 2011. The order involves an investment of more than EUR200 million. |
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Hydrographic Survey for Riverbed Erosion |
U.S. Geological Survey were out on the Missouri River at Williston, North Dakota, USA, performing a hydrographic survey to monitor the state of riverbed erosion. They were using a multibeam echo sounder which transmits sound energy and analyzes the return signal (echo) that has bounced off the riverbed or other objects. Multibeam sonars emit sound waves from directly beneath a ship's hull to produce fan-shaped coverage of the riverbed.
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The new ships will have two separate hoppers, allowing for the optimal use of their capacity in all circumstances, including shallow waters. In addition, the pumping capacity on the vessels is high, allowing them to pump large volumes over longer distances. This means that they can be used in a wide range of projects throughout the world, for both large-scale land reclamation and the