Arctic Challenger

[1] This barge is designed to function as a "novel engineering solution" which they refer to as an Arctic Containment System[2] to respond should a blowout event occur at drilling sites in the Beaufort or Chukchi Seas.

The US Bureau of Safety and Environmental Enforcement (BSEE) reported that the vessel was able to meet their requirement for processing 2000 gallons of seawater per minute during testing in March, 2013.

[7] The second line is activating a blowout preventer, which for Shell Oil in the Arctic involves a double shear ram for redundancy.

That attempt failed ultimately because "methane gas escaping from the well would come into contact with cold sea water and form slushy hydrates, essentially clogging the cofferdam with hydrocarbon ice.

While it's a fourth line of defense in the unlikely event of a loss of well control, it will not be deployed until it meets our high standards.”[11] From the report on the Deepwater Horizon oil spill by the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling:[12] Industry’s responsibilities do not end with efforts to prevent blowouts like that at the Macondo well.