Petty Officer 3rd class Matthew Hilleary completes a rescuer-in-the-water drill under the watchful eye of an evaluator at Station Calumet Harbor in Chicago Feb. 15, 2017. Even though the water temperature was only 33 F and there was no ice present, personnel made due with floatation mats to simulate ice in the boat basin. (U.S. Coast Guard photo by Station Calumet Harbor)