Petty Officer 2nd Class Nils Selander, a boatswain’s mate aboard the Coast Guard Cutter Polar Star, stands watch on the ship’s bridge as it transits out of Lyttelton, New Zealand, Wednesday, Jan. 3, 2018. The crew of the Seattle-based Polar Star visited New Zealand 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.