Subsea Rock Installation Vessel

The fleet of Jan De Nul Group disposes of two specific types of rock installation vessels: Fall Pipe Vessels and Side Stone Installation Vessels.

A Fall Pipe Vessel (FPV) is equipped for rock installation on pipelines and other subsea structures in deep sea. Using its fall pipe it is able to install rocks with a size up to 400 mm in 2,000 m water depth. The fall pipe end is positioned by a powerful remotely operated underwater vehicle (ROV) and allows for accurate rock installation on the seabed.

A Side Stone Installation Vessel (SSIV) is used for rock protection on offshore structures such as pipelines in shallow areas and for underwater rock berm construction. The rocks on board are pushed over its side. Some SSIV’s are equipped with an inclined fall pipe for rock installation underneath platforms and fixed structures.

Isaac Newton
Deadweight: 12,500 ton
Built in: 2015
Joseph Plateau
Deadweight: 36.000 ton
Built in: 2013
Simon Stevin
Deadweight: 36.000 ton
Built in: 2010
Willem de Vlamingh as Side Stone Installation Vessel
Deadweight: 6.500 ton
Built in: 2011
Willem de Vlamingh with Flexible Fall Pipe
Deadweight: 6.500 ton
Built in: 2011
La Boudeuse with Flexible Fall Pipe
Deadweight: 6.310 ton
Built in: 2005
La Boudeuse with Inclined Fall Pipe
Deadweight: 6.310 ton
Built in: 2005
Tiger
Deadweight: 6.310 ton
Built in: 2012
Adhémar de Saint-Venant
Deadweight: 6,200 ton
Under construction – 2017
Daniel Bernoulli
Deadweight: 6,200 ton
Under construction – 2017

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