Kure Atoll (28° 25' N - 178° 20' W) is the farthest island group from Honolulu (about 1,400 miles).   The atoll is comprised of a circular reef 5 miles in diameter and the largest island (Green in photo above) is only 1.5 miles long.  Kure was mined for guano (bird manure) by Australian Copra & Guano Ltd. from 1876 until 1936.  The U.S. Coast Guard constructed a LORAN -C station on the island, but the advent of Satellite Global Positioning systems made it obsolete.