Senior Chief Petty Officer Jose Segura and Chief Petty Officer Josh Dehaan, boatswain’s mates aboard the Coast Guard Cutter Polar Star, stand watch on the bridge while transiting through ice below the Antarctic Circle on Sunday, Jan. 7, 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.