Per Goetz Liedtke on the SCADAlisterve, “Siemens is the market leader in oil drilling control systems. The Deepwater Horizon drilling rig had both Siemens and GE Fanuc equipment, but I believe the latter was in the Blow Out Preventer (yes, off-shore oil drilling rigs use PLCs or controllers in the underwater equipment - even 5000 feet down).”

[link to community.controlglobal.com]

Hmmmm....



Doesn't make any difference whose equipment is being used in a rig if it's being gerry-rigged and then blown into the water.

Perhaps it would matter if Stuxnet has been around longer then we think. Iran maybe just the tip of the iceburg.