Seaman Clayton Burnett, a lookout watchstander aboard the Coast Guard Cutter Polar Star, keeps a sharp eye on ice floes in front of the ship while transiting through sea ice in the Southern Ocean toward the position of the Antarctic Chieftan, Feb. 13, 2015. Polar Star's crew is en route to the Antarctic Chieftain, which is disabled and beset by ice near 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)