Disaster struck the Imperial Trans-Antarctic Expedition when its ship, Endurance, became trapped in pack ice and finally sank in the Weddell Sea off Antarctica on 21 November 1915. The crew escaped by camping on the sea ice until it disintegrated, then by launching the lifeboats to reach Elephant Island and ultimately South Georgia Island, a stormy ocean voyage of 1,330 km and Shackleton's most famous exploit. via @wikipedia 2/