Seaman Nicholas Libbing, a member of deck force aboard Coast Guard Cutter Polar Star, uses a bolo to send a messenger line to the crew of the disabled fishing vessel Antarctic Chieftain, Feb. 14, 2015. Antarctic Chieftain became disabled and beset by ice near Cape Burks, Antarctica. 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)