A Coast Guard MH-60 Jayhawk helicopter, from Air Station Kodiak conducts the 13th hoist of 18 crewmen from the mobile drilling unit Kulluk 80 miles southwest of Kodiak City, Alaska, Saturday, Dec. 29, 2012. The tug Aiviq suffered problems towing the Kulluk prompting the Coast Guard to deploy cutters and aircraft while Royal Dutch Shell dispatched additional tugs.