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The tugs Corbin Foss, Ocean Wave and Lauren Foss begin the tow of the conical drilling unit Kulluk from Kiliuda Bay near Kodiak Island, Alaska, Feb. 26, 2013, with the tug Guardsman, tug Warrior, Nanuq and Aiviq on scene to assist. A safety zone has been established around the Kulluk and an Air Station Kodiak MH-60 Jayhawk helicopter crew overflew the area to confirm there were no security concerns. (U.S. Coast Guard photo by Petty Officer 1st Class Sara Francis)

Coast Guard conducts overflight of Kulluk tow in Kiliuda Bay, Alaska

( Petty Officer 1st Class Sara Francis / U.S. Coast Guard / February 26, 2013 )

The tugs Corbin Foss, Ocean Wave and Lauren Foss begin the tow of the conical drilling unit Kulluk from Kiliuda Bay near Kodiak Island, Alaska, Feb. 26, 2013, with the tug Guardsman, tug Warrior, Nanuq and Aiviq on scene to assist. A safety zone has been established around the Kulluk and an Air Station Kodiak MH-60 Jayhawk helicopter crew overflew the area to confirm there were no security concerns. (U.S. Coast Guard photo by Petty Officer 1st Class Sara Francis)