Offshore installation of bioWAVE energy unit in Australia

Cargo description: BioPower Systems (BPS) pilot unit and retrieval rig weighing a total of 698 mt
POL: Vungtau, Vietnam
POD: Offshore near Port Fairy, Australia
Vessel name: HHL Fremantle
Vessel type: P2-1400
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Challenges

  • Delicate operation which required exceptional seamanship and engineering expertise
  • The positioning of the ship was crucial to ensure accurate heading alignment. The unit had to be lowered through the splash zone at an angle of 15 degrees in order to reduce dynamic effects from the waves before lowering it to the seabed.
  • The tween deck raise construction was designed and calculated by our in-house Naval Architects and was approved by DNVGL 
  • To protect the Australian environment, a rigorous process of pollution control was carried out, to ensure all equipment, including shackles, grommets, crane hooks/blocks, and heave-compensators, were treated with environmentally safe lubrication.
  • HANSA HEAVY LIFT engineers used remote controlled hydraulic shackles for underwater unhooking as well as heave-compensators to reduce dynamic forces on the cranes.
  • Due to the rigging arrangements with the heave-compensators the lifting height was limited. Six winches were needed to control the unit’s swaying.