It should have been completed and in use by next year. Instead, the Norwegian drilling rig Deepsea Aberdeen has sunk to the bottom of the sea off the coast of the shipyard in South Korea where it was built, according to several media. Offshore.no reports that the rig - worth approx. USD 645 million - is not completely covered by water, as the rig stands at a depth of merely 20 meters. The accident allegedly occurred because one of the rigs pontoons began to take on water.