Ensign Tasha Bull stands watch on the bridge of the Coast Guard Cutter Polar Star 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.