What lies beneath

摘要

It Is not the invasion of Normandy, but by peacetime standards the flotilla stationed about 65km (40 miles) off the Louisiana coast is a mightily impressive one. Where once the ill-fated Deepwater Horizon drilling rig floated in solitary splendour, there are now two similar rigs, along with the Discoverer Enterprise, a drilling ship; the Viking Poseidon, which knows how to install things on the sea floor; four mother ships for remotely operated underwater vehicles; various barges and supply vessels; and the Q4000, a rig that specialises in repairing and closing wells.