Marc Rothwell (right), an Ice Navigator and 35-year veteran of the Canadian Coast Guard, surveys a chart aboard the bridge of the Coast Guard Cutter Maple (WLB 207) during a port call in Nome, Alaska, to assist the crew on its historic voyage up through the Northwest Passage, July 20, 2017. Cutter Maple and crew are scheduled to arrive in late August to the Coast Guard Yard in Baltimore. U.S. Coast Guard photo.