North Pole Since 2002, the Russians have also annually established a base, Barneo, close to the Pole. This operates for a few weeks during early spring. Studies in the 2000s predicted that the North Pole may become seasonally ice-free because of Arctic ice shrinkage, with timescales varying from 2016 to the late 21st century or later. The sea depth at the North Pole has been measured at by the Russian Mir submersible in 2007 and at 4,087 m (13,410 ft) by USS "Nautilus" in 1958. The nearest land is usually said to be Kaffeklubben Island, off the northern coast of Greenland about
North Pole the third pair of submarines to surface together at the North Pole. In March 1990, "Gurnard" deployed to the Arctic region during exercise Ice Ex '90 and completed only the fourth winter submerged transit of the Bering and Seas. "Gurnard" surfaced at the North Pole on April 18, in the company of the USS "Seahorse" (SSN-669). On 6 May 1986 USS "Archerfish" (SSN 678), USS "Ray" (SSN 653) and USS "Hawkbill" (SSN-666) surfaced at the North Pole, the first tri-submarine surfacing at the North Pole. On 21 April 1987 Shinji Kazama of Japan became the first person to reach the