Who is Frank Worsley, captain from Endurance: Shackleton's Incredible Voyage and what is their importance?

Frank Worsley, a New Zealand sailor, is captain of Endurance. His service during the initial stages of the expedition appears to have been rather pedestrian. After Endurance is crushed his skills became critical and obvious as he takes observations and calculates the crew's drifting position. He retains the only functional chronometer throughout the expedition which he wears about his neck at all times—without the instrument his observations are useless.