Shackleton's journey by open lifeboat from Elephant Island to South Georgia was in itself pretty astonishing. Captain Frank Worsley navigated using iirc a couple of pencils and a rubber band, and only caught a few glimpses of the sun to help his calculations. They landed on the wrong side of the island and had to climb a mountain pass to get to the whaling station. At the top of the pass they decided, what the hell, and slid down on their backsides. This didn't kill them, phew, but it did shred their trousers, so at the bottom they carefully safety-pinned the bits together, "in case there are ladies".
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