Staff from the Sea Launch company, which organised the launch, direct all missions from a supportvessel that sits at a safe distance of about 6.5km uprange of the platform.
The operation to right the Concordia is the biggest maritime salvage exercise ever undertaken with 111 divers working in shifts 24 hours a day from a floating accommodation supportvessel tethered next to the wreck.
Fulton persuaded Livingston not only to support his efforts to design a vessel that would incorporate recent innovations, but to cut him in for 50% of any profits.
The navy's Portsmouth-based ice patrol vessel sailed to South Georgia as part of its support of environmental work on the island, and the stone was finally returned.
The third mistake was that, because the workers were allowed to bypass the time-consuming mixing process in the tower, with its automatic controls for preventing such things happening, they were free to dump their material into a vessel that was not designed to prevent the accumulation of a critical mass sufficient to support a chain reaction.