Coast Guard divers check equipment on Petty Officer 2nd Class Dylan Smith, a Coast Guard Regional West diver, on one of the Coast Guard Cutter Polar Star’s landing craft in McMurdo Sound, Antarctica, Feb. 6, 2016. As the standby diver, Smith was prepared to enter the water in an emergency situation. (U.S. Coast Guard photo by Petty Officer 2nd Class Grant DeVuyst)