acoustic switch, whicis not required in the u.s.. should it be? we do not things up, because we had three triggering systems for the blowout preventer and then a manual intervention. this acoustic devices essentially another triggering device. it would have to be looked at through the investigation to see a fact that at some positive redundancy into the system. i do not know but i do not believe that it would have made a difference. do you think that u.s. regulations should be reformed to require this as a backup? even if it would not have helped in this situation? i think the regulation should be looked at. anything that would make this a lower probability in safer should be looked into. there has been reports that the battery on a blowout preventer was dead. have you confirmed that to be the case? a blowout preventer on the rig in the riser and all of the equipmt are the property of transocean. i am not familiar with the condition of the batteries. obviously the i