Humans walking from Ronne ice shelf to Ross Iceshelf

Hello all. I would identify myself as someone who enjoys the idea of the flat earth theory, and enjoy seeing discourse between globers and flat earthers. I came across this article: [US man finishes solo race across Antarctica](https://www.bbc.com/news/world-us-canada-46687892.amp) Detailing the story of two individuals racing against one another from the Ronne ice shelf to the Ross ice shelf. If the information in the article is credible, and If the earth were flat, how would such a feat be accomplished? Articles states it took him 53 days to walk 921 miles (1,482 km) from one ice shelf to another. The position of the ice shelves do not bisect the continent by any means, but on an inverted flat earth map wouldn’t this be impossible to do?

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