The trailing suction hopper dredger Spauwer is an ultra-modern TSHD and has been designed and built in house by Den Herder Seaworks. This TSHD is specially designed for dredging within areas up to 65 meters of water depths.
By using spud poles, mooring actions are minimised. Before and during unloading, the load is pumped dry using a vacuum installation. he dry unloading installation is developed and designed by years of experience and is capable unloading the vessel in an average of 2.5 hours. The vessel is equipped with a special designed hydraulic screening plant so we can produce products as requested by our customers.
The key to success of the company is based on the highly skilled crew
and the high standard of maintenance which improves the reliability of our fleet. They form the strength of the company.
Type of vessel:
Double propeller trailer suction hopper dredger with underwater pump installation, dry unloading installation with grab crane and conveyor belts.
Year of construction
Yerseke, The Netherlands
Bureau Veritas, self-discharging hopper dredger
Classification symbol: I
Construction marks: ✜ HULL ✜ MACH
Navigation notation: unrestricted navigation
✜ AUT-UMS / ICE CLASS IC
A1 & A2
Navigation/ safety equipment:
In accordance with class requirements and SI
2x, telescopic, winch-operated
Length between perpendiculars:
GT / NT:
9.781 GT/ 2.934 NT
Fuel tanks total:
Lubricating oil tanks total:
Hydraulic oil tanks total:
7.453 m3, deadweight 13.060 tons
Dredging depth :
Approx. 65 meter
Dredge pump :
In-house design, driven by an electric submersible motor, type MIBS 1000M-12s, 2.050 kW
Jet water pump:
Nijhuis 1500 kW, cap. 7.100 m3/uur, 5-10 bar
In-house design, pipe with electrically driven submersible pump installation, diameter 900 mm, with cardan shaft, jet water pipe and draghead.
Gantries with winches and stabilizers.
Dry unloading installation:
Hydraulic crane with a grab of 25 m3, movable over rails.
Conveyor belts electrically/hydraulically driven.
2x GE diesel engines, type 16V250, power 4.038 kW each, ZF Marine W8310NR reduction gearbox, reduction 1000:157
2x GSIF A, driven by main engine, power 5.000 kVA each at 1.000 rpm
3x Scania, DI-13 075 M, 353 kW/50Hz each
2x Verhaar OFP1800, 750kW each, electrically driven