Members of Coast Guard Cutter Polar Star's deck force pay out messenger line to the crew of the disabled fishing vessel Antarctic Chieftain near Cape Burks, Antarctica, Feb. 14, 2015. Polar Star's crew uses messenger line to pass a tow hawser to the Antarctic Chieftain, which is beset by ice. Polar Star's crew has been underway in Antarctica in support of Operation Deep Freeze 2015, part of the U.S. Antarctic Program, managed by the National Science Foundation. (U.S. Coast Guard photo by Petty Officer 1st Class George Degener)