The "James Caird" was launched on 24 April 1916. The success of the voyage depended on the pin-point accuracy of Worsley's navigation, using observations that would have to be made in the most unfavourable of conditions. The prevailing wind was helpfully north-west, but the heavy sea conditions quickly soaked everything in icy water. Soon ice settled thickly on the boat, making her ride sluggishly. On 5 May, a north-westerly gale almost caused the boat's destruction as it faced what Shackleton described as the largest waves he had seen in 26 years at sea. On 8 May, South Georgia was sighted, after a 14-day battle with the elements that had driven the boat party to their physical limits. Two days later, after a prolonged struggle with heavy seas and hurricane-force winds to the south of the island, the party struggled ashore at King Haakon Bay.