In this photo provided by the U.S. Coast Guard, the tug Aiviq 

In this photo provided by the U.S. Coast Guard, the tug Aiviq travels at just under 2 mph with the mobile drilling unit Kulluk in tow 116 miles southwest of Kodiak City, Alaska, Sunday, Dec. 30, 2012. The crews remain stationed with the drill rig Kulluk Sunday 20 miles from Alaska's Kodiak Island as they wait in rough seas for another tug boat to arrive. The Coast Guard says the goal is to tow the Kulluk to a safe harbor and determine the next step. (AP Photo/U.S Coast Guard, Chris Usher)
Associated Press
In this photo provided by the U.S. Coast Guard, the tug Aiviq travels at just under 2 mph with the mobile drilling unit Kulluk in tow 116 miles southwest of Kodiak City, Alaska, Sunday, Dec. 30, 2012. The crews remain stationed with the drill rig Kulluk Sunday 20 miles from Alaska's Kodiak Island as they wait in rough seas for another tug boat to arrive. The Coast Guard says the goal is to tow the Kulluk to a safe harbor and determine the next step. (AP Photo/U.S Coast Guard, Chris Usher)
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