5 ¼" Holdback
chains at more than 300KG per meter
Holdback system and stabilization
Underwater support and portside sponsons
The Parbuckling
Starboard sponsons
Refl oating
limitations on wave and swell actions to avoid increased risks of shock-loads and failure.” However, every precaution has been taken in the preparations.
Sloane adds: “T e complete parbuckling system—both inshore and off shore—has been designed to complement each other and allow for variations in the expected loads due to the unknown factors, or factors where assumptions have been made. While the unknown adds risk to the operation, we feel the redundancy in the system and the ability to adjust the complete system loads, and individual loads, shall allow us to deal with these risks.”
“This is an unprecedented operation. It’s the biggest ship recovery operation ever, by quite some margin.”
- Captain Nicholas Sloane, Senior Salvage Master, Costa Concordia Removal Project
18 MARCH-APRIL 2013 WIRE ROPE EXCHANGE
PROJECT PHASES UNDERWAY Titan Salvage and Micoperi began the wreck-removal process in May, 2012, and intend to undertake the parbuckling and towing of the Costa Concordia by the end of this summer. At the site, about 460 workers, engineers, and divers, representing 18 nationalities, are working day and night, seven days a week, using about 20 vessels. T e project includes six phases, some of which have already been completed:
Stabilization: T e ship has been secured to prevent further sinking or slippage with an anchoring system along the sea fl oor.
Creation of False Bottom: Crews have completed almost 50% of the foundations for the six undersea platforms on which the wreck will rest once it’s been rotated into a vertical position.
Installation of Refl oating Sponsons: With the help of Micoperi’s crane, 11 of the 15 refl oating sponsons will be installed on the left side of the wreck.
Parbuckling of Vessel: T e rotation of the ship will be done carefully, with pre-tensioning over several days before the day she actually
Diagram, photo and ship renderings courtesy of project partners Costa Crociere and Titan Micoperi
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