explosion
The report squarely blames Transocean, which managed the "Deepwater Horizon", for being largely responsible for the 
 that claimed eleven lives. The rig had "serious safety management system failures and a poor safety culture," the report says. Transocean fiercely rejected allegations that crews aboard the rig were badly trained and equipment was poorly maintained.
U.S. Coast Guard investigation finds 'poor safety culture' contributed to Deepwater Horizon disaster