The semi-submersible drilling rig, Transocean Marianas, was preparing to move to a new location off the coast of Ghana when the rig developed a serious list and was in danger of sinking.  The rig, under contract to Italian oil company Eni, was not drilling at the time.   gCaptain is reporting that an anchor punctured a pontoon causing the list. 108 personnel were evacuated, leaving only an emergency staff of 13 aboard the rig.  A Transocean representatives has said that the rig  has been stabilized.

Transocean rig off Africa taking on water

Transocean, the world’s largest offshore drilling contractor, was also the owner of the Deepwater Horizon, which exploded and sank on April 20, 2010, resulting in the largest largest accidental marine oil spill in the history.