captured in footage restored and released by the bfi. the endurance became stuck in sea ice soon after it set off from south georgia, drifting for months before the crew was eventually ordered to abandon ship. the endurance expedition was amazingly well documented, with photographs, film and crucially, navigation records, which were vital for locating the wreck beneath the ice. what is extraordinary is it was found just four and a half miles, that's about seven kilometres, from the coordinates recorded on the day the ship sank, more than 100 years ago. this was all down to frank worsley, the ship's captain. frank worsley really needs to be recognised now, even more than he was at the time, as an expert navigator. he was using all of the equipment that was at his disposal