Marine & Offshore

Seven Seas

Project information

Project Seven Seas

Croon Marine & Offshore was the electrical system integrator and installation contractor for this new build project at IHC Merwede. The Seven Seas is a vessel with high-end technology. Building a vessel of this kind requires technological knowhow and experience in building such a complex vessel. The new build Seven Seas is a multifunctional, powerful and reliable SURF (Subsea, Umbilicals, Risers and Flowlines) vessel capable of flexlay and field development. The vessel is designed to operate in the Atlantic Triangle: US Gulf, West Africa and Brazil. The vessel’s other tasks are deep-water construction work, rigid reeled lay, J-lay and ROV work. The Seven Seas was built at the IHC Merwede yard in the Netherlands as a sister to the Seven Oceans, Seven Pacific and Seven Atlantic, all commissioned by SURF contractor Subsea 7.

Croon managed, engineered, integrated, installed and commissioned the
following systems:

  •  High and low-voltage system, switchgear, distribution panels and powermanagement system
  •  Diesel electrical propulsion, 3 x 2,950 kW + 2 x 2,400 kW + 1 x 2,200kW
  •  Transformers
  •  Alarm monitoring and control system
  •  Navigation and external communication system
  •  Telephone, general alarm and public address system
  •  Control desks
  •  Fire detection system
  •  Dynamic positioning system, including positioning reference systems
  •  Complete cabling
Main data
Name Seven Seas
Type of Vessel Flexlay Vessel
Docking 2008
Length overall 153,24 m
DP Class 2
Total installed power 21,700 kW
Main crane capacity 400 t
Pipelay capacity 5,500 t
Operation depth 3,000