National Geographic : 1957 Sep
391 David S. Boyer, National Geographic Staff Ski-rigged Otter, an Antarctic Work Horse, Keeps Engine Warm While Delivering Fuel Without air support the trek would have been impossible. Besides scouting the route, Navy and Air Force planes delivered 50,000 gallons of diesel oil and flew in food, explosives, and spare parts. Versatile and rugged, the de Havilland Otter won its spurs as a bush plane in Canada. Picture was taken on the Ross Ice Shelf.