The icebreaker RSV Nuyina’s round trip between the Australian Antarctic Division headquarters in Hobart, Tasmania state, and Australia’s Casey Station covered more than 6,500 kilometers (4,000 miles) and took more than two weeks as the Southern Hemisphere winter became spring.

“The RSV Nuyina has returned to Hobart after the successful medical evacuation of an unwell expeditioner from Casey research station,” a division statement said.