Crewmembers aboard the Coast Guard Cutter Polar Star conduct damage control drills to ensure readiness while underway on the Southern Ocean on Friday, Jan. 5, 2018. The crew of the Seattle-based Polar Star is on its way to Antarctica in support of Operation Deep Freeze 2018, the U.S. military’s contribution to the National Science Foundation-managed U.S. Antarctic Program. U.S. Coast Guard photo by Chief Petty Officer Nick Ameen.