Voyage to the Bottom of the Sea the Atlantic via the North Pole. On August 3, 1958, she became the first ship to reach the North Pole. For this accomplishment, "Nautilus" and her crew were awarded the Presidential Unit Citation, the first Presidential Unit Citation awarded in peacetime. The citation began with the words, "For outstanding achievement in completing the first voyage in history across the top of the world, by cruising under the Arctic ice cap from the Bering Strait to the Greenland Sea." "Nautilus 90 North" (1959, with Clay Blair) was the first book Anderson wrote about the Arctic missions of USS "Nautilus". It was
Hans Tausen Ice Cap Hans Tausen Ice Cap Hans Tausen Ice Cap () is an ice cap in northern Greenland. Ice cores show it is around 3500–4000 years old. It formed since the Holocene climatic optimum of 6000-8000 BP. The ice cap is about 100 km from north to south and 80 km from east to west and sits on a 1300 m high plateau. The Hans Tausen Ice Cap is the source of many glaciers, including Ymer Glacier, Lur Glacier and the Tjalfe Glacier. It is a well studied ice cap, and is important to understanding the last Climatic Optimum. (Holocene climatic optimum)