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Tern Island is a tiny coral island located in the French Frigate Shoals in the Northwestern Hawaiian Islands, at approximately 490 miles west north west of Oahu. It has a land area of 105,276 m² (26.014 acres). The island provides a breeding habitat to millions of nesting seabirds, threatened Hawaiian Green Sea Turtles, and endangered Hawaiian Monk Seals. It is maintained as a field station in the Hawaiian Islands National Wildlife Refuge by the United States Fish and Wildlife Service.
After the Battle of Midway, the U.S. Navy built a Naval Air Station on Tern Island, enlarging the island sufficiently to support a 3300 ft. (1005 m) landing strip. The Station's main function was as an emergency landing site for planes flying between Hawaii and Midway Atoll. The original seawall, runway, and some of the buildings remain.