Familiar and good
The Swalinge was built as a coaster in 1977 and rebuilt into a trailing-suction hopper dredger after being purchased by Den Herder Seaworks in 1996.
The dry unloading installation was designed and built to our own specifications.
The average unloading time of the vessel takes 1.5 hours.
The hopper of the Swalinge is fitted with bottom doors so she can dump her cargo and she is also capable to use a shore delivery installation for pumping the cargo ashore.
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.
Type of vessel:
Single propeller trailer suction hopper dredger with single trailing suction pipe, bottom doors, and equipped with a shore wet- and dry unloading installation.
Year of construction
1977/ rebuilt in 1996
Yerseke, The Netherlands
100 A1, A2 hopper dredger, LMC
A1 & A2
Navigation/ safety equipment:
In accordance with class requirements and SI
Length between perpendiculars:
GT / NT:
2.071 GT / 612 NT
Fuel tanks total:
Lubricating oil tanks total:
Hydraulic oil tanks total:
1.810 m3, deadweight 3.300 tons
Dredging depth :
Approx. 30 metres
Dredge pump :
Ellicott, type 850, driven by Caterpillar type 3512HD, 1,400 kW
Van Rees, type 650/550, driven by main engine
Jet water pump:
1x Nijhuis 750 kW, driven by diesel engine
1x Nijhuis 500 kW, driven by electromotor
In-house design, diameter 850 mm, with cardan shaft, jet water pipe and draghead. Gantries with winches and stabilizers.
Double screening plant
Dry unloading installation:
Hydraulic crane with a grab of 13 m3, movable over rails. Conveyor belts electrically/ hydraulically driven
MAN B&W diesel engine, type 8L27/38, power 2,720 kW, gearbox MAN B&W AMG-28-VO and propeller type VS 860, reduction 600:178
3x Caterpillar, type 3412, 490 kW
1x Caterpillar, type 3306, 170 kW
2x DAF, type 615, 60 kW
Lips, with 500kW electrically driven