This delivers major savings in time and cost compared to the usual multiple lift technique using crane vessels. Depending on load distribution and environmental conditions, the heavy lifter is designed to lift from 25,000 to 40,000 tons.

Converteam in Rugby UK have devised a transformer-less power distribution installation which will include eight 1,650 kW thruster motors controlled by Converteam MV3000 drives. The transformer-less configuration crucially helps to reduce the overall cost of the power and propulsion system and will also contribute to the 40 ton weight saving which helps to increase the vessel’s lift capability.

The vessel’s propulsion system will be used during the final approach to the targeted platform powered by eight 2,300kVA, 690V alternators providing enough power to the eight thrusters to maintain position whilst removing the topsides in adverse sea conditions. Converteam’s A-series Class 2 dynamic positioning system will enable the heavy lifter to keep a high accuracy position during the critical phase of removing a topside while their A-series automation system provide the crew with control, alarm and monitoring facilities as well as a user friendly human-machine interface. All systems are designed to give the vessel a high level of security and safety due to redundant networks.

The vessel is due to become operational during the summer of 2009.