U.S. Navy Petty Officer 1st Class Webb Phillips, a hospital corpsman and member of the military dive team aboard Coast Guard Cutter Polar Star, gives neurological examination training to his fellow dive team members while underway in the Ross Sea in support of Operation Deep Freeze 2015, Jan. 8, 2015. Neurological examinations are performed any time there is a possibility of diving-related injuries. (U.S. Coast Guard photo by Petty Officer 1st Class George Degener)