Shackleton refused to pack supplies for more than four weeks, knowing that if they did not reach South Georgia within that time, the boat and its crew would be lost. The "James Caird" was launched on 24 April 1916; during the next fifteen days, it sailed through the waters of the southern ocean, at the mercy of the stormy seas, in constant peril of capsizing. On 8 May, thanks to Worsley's navigational skills, the cliffs of South Georgia came into sight, but hurricane-force winds prevented the possibility of landing. The party was forced to ride out the storm offshore, in constant danger of being dashed against the rocks. They later learned that the same hurricane had sunk a 500-ton steamer bound for South Georgia from Buenos Aires.