Marine & Offshore

Seven Waves

Project information

Project Seven Waves
Locatie IHC Merwede
Opdrachtgever Subsea 7

Croon was the electrical system integrator and installation contractor for this new build project at IHC Merwede. The Seven Waves 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 Seven Waves has an overall length of 146 meters, a beam of 30 meters and a Class-2 dynamic positioning system. The vessel is equipped with a vertical lay system – with 550t top tension capacity – and twin ROVs. She is fitted with two under deck storage carousels, with a capacity for 2,500t and 1,500t of product respectively. The lay tower can operate at an angel of up to 10º and is fitted with: two tensioners, each with a 275t capacity, which can both be retracted clear of the firing ling: and two wire centralizers.

This pipe laying vessel will be used to develop deep-sea oilfields of up to 2,500 meters off the coast of Brazil on behalf of Petrobras.

IHC Merwede

The Seven Waves is the fifth vessel contracted by Subsea 7 to IHC Merwede’s Offshore division in the Netherlands as a sister to the Seven Oceans, Seven Pacific, Seven Atlantic and Seven Seas.

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

  • High and low-voltage system, switchgear, distribution panels and power management system
  • Diesel electrical propulsion, 3 x 2,950 kW + 2 x 2,400 kW + 2 x 2,200 kW
  • 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

Scope of Service

  • Project Management
  • Systems and Installation Engineering
  • Electrical System Integration
  • Cable Installation and Connection
  • Commissioning