UK: Seajacks Publishes Zaratan Construction Summary

Seajacks Publishes Zaratan Construction Summary (UK)

In February 2010 Seajacks entered into a contract with GustoMSC to provide the Basic Design Package for two purpose built wind farm installation vessels.

In June 2010 Seajacks entered into a contract with Lamprell shipyard to build these new vessels and Seajacks will take delivery of the first new-build, Seajacks Zaratan, in May 2012, and the additional new-build shortly thereafter.

These self-propelled jack-ups have been designed specifically to service the wind farm installation market in the harsh operating environment of the North Sea, as well as to provide services to the oil and gas industry. The vessels will be a modified version of the MSC NG5500 design, which incorporates a fully redundant DP2 propulsion system, accommodations for 90 persons, and an 800T leg encircling crane designed by MSC.



  • Completed
  • Paint system completed up to main deck level.

 Spud cans

  •  Completed.


  •  All 4 x starter leg sections installed on board – welding to spud cans completed
  • All leg sections are now complete and delivered to the yard
  • Welding of all remaining sections (2/3) now complete
  • P.A leg No.3 – section 2 & 3 now installed and final welding taking place
  • Leg 1 – sections 2 & 3 being painted then ready for installation
  • Leg 4 – Installing jetting piping, then ready for installation
  • Leg 2 – Pressure testing jetting piping, then ready for installation.

 Main deck

Complete with exception of:-

  •  Secondary/ tertiary steel now being fabricated and installed
  • Main crane boom block pocket now installed and being painted
  • Mooring equipment is still being installed.


  •  Structure complete
  • Blasting and painting in progress
  • Insulation, electrical, plumbing, HVAC, and outfitting works ongoing throughout and furniture being installed
  • Helideck pancake – block 44 – installed onboard, technician has been in attendance to assemble aluminium heli deck – now ready for painting and then final installation
  • Secondary/ tertiary steel continues being fabricated and installed.

 Machinery foundations

  •  Completed throughout.

 Cable trays

  •  Completed throughout.

 Electric cable

  •  Installation and termination of remaining cables ongoing throughout machinery spaces, public spaces and accommodation
  • Most work is now on control / automation cable
  • Installation should be totally complete within 4 weeks.

 Machinery installation

Installation of all machinery complete with exception of:-

  •  Main crane, 2 x auxiliary cranes, 2 x lifeboats, Fast Rescue Boat, emergency anchor winch, clump weight winches
  • Aft thrusters units are now being fitted.

 Pipe work

Complete with exception of:-

  •  Installation of leg jetting system, water mist and Helideck systems.

 Main 800T crane

  •  Tub collar installed and fully welded
  • All main components onsite except for main hoist wire
  • Currently installing bogies on slewing platform
  • Main electrical power cables now installed and being terminated.

 Jacking system

  •  System is now complete and rig has been jacked several times.

 Electrical work

  •  N.E.S and Kongsberg progressing
  • Kongsberg consoles installed in E.C.R and on bridge
  • Installing panels in the bridge electrical room.

Auxiliary cranes

  •  Both cranes on site
  • 2 x crane pedestals completed and both installed
  • Mounting flanges are being installed
  • Cranes to be fitted within next two (2) weeks.


Offshore WIND staff, February 23, 2012; Image: seajacks