Naval Submarine Base New London by the Submarine Escape Immersion Equipment in the 2000s. On January 21, 1954 the first nuclear-powered submarine, , was launched from Groton. "Nautilus" became the first vessel to transit the North Pole during a historic trip across the Arctic in 1958. "Nautilus" spent most of her career assigned to Submarine Squadron 10 located at State Pier in New London. It was retired from service in 1980. In 1982 "Nautilus" was designated a National Historic Landmark in Groton. It is permanently moored south of the main gate, attached to the U.S. Submarine Force Museum. Self-guided tours are available to the public
North Pole heat), rather than at altitude on a continental land mass. Despite being an ice cap, it shares some characteristics with a tundra climate ("ETf") due to the July and August temperatures peaking just above freezing. Winter temperatures at the northernmost weather station in Greenland can range from about , averaging around , with the North Pole being slightly colder. However, a freak storm caused the temperature to reach for a time at a World Meteorological Organization buoy, located at 87.45°N, on December 30, 2015. It was estimated that the temperature at the North Pole was between during the storm. Summer