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
French submarine Espadon (S637) front of her sail. On 13 August 1963 a fire in the torpedo room wounded and intoxicated four sailors, one of whom later died of his wounds. In May 1964, "Espadon" and "Marsouin" steamed under sea ice in the Norwegian Sea as far as 70° north. "Espadon" undertook significant modifications from 1966 to 1968, notably upgrading the boat's sonar, sail and rudders. "Espadon" has been a museum ship at the "ville-port" of Saint-Nazaire in the German-built submarine base since 1987. French submarine Espadon (S637) Espadon was a "Narval"-class submarine of the French Navy. Along with sister boat "Marsouin", the boat