2,670 m3 Trailing Suction Hopper Dredger ‘Contender’

For the Dutch firm ABEKO Marine, Conoship International provided the conversion design and calculations of the former 3,200 tdw general cargo vessel into a state-of-the-art Trailing Hopper Suction Dredger. Our activities comprises the re-design of the general arrangement of the vessel to a dredger, hull form modifications, stability and watertight integrity.

To obtain more deadweight and to improve the vessels stability, two sponsoons were fitted to the full midship length of the hull, enlarging the bread from 12.50 to 16.00 m. The cargo hold is re-designed into a hopper with bottom doors. Discharging of the hopper can also occur by means of a rain bowing system, a floating pipeline or by an excavator. The maneuverability of the vessel has been enhanced with four thrusters which make the vessel capable for operation in a narrow areas.

Main particulars
Length over all87.99m
Length between perpendiculars83.78m
Breadth moulded16.00m
Draught (summer)4.72m
Deadweight @ T = 4.72 m3,423t
Draught (dredging)5.58m
Deadweight @ T = 5.58 m4,385t
Gross Tonnage2,520
Service speed10.0kn
Main engine1,380bkW
Bow thruster200bkW
Dredging particulars
Diameter of dragarm700mm
Maximum dredge depth25.0m
Dredge pump output650bkW
Hopper capacity2,680m3
Fuel Oil (MGO)160m3
Potable Water58m3
Technical Fresh Water (for desilting)600m3
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