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Late on the night of August 2, 1981, a Hong Kong freighter navigating the choppy waters of the Bay of Bengal ran aground on a submerged coral reef. The ship, called the Primrose, was hopelessly stuck. But there was no danger of it sinking so the captain and crew settled in for a few days' wait until help arrived.
The following morning, as it became light, the sailors saw an island a few hundred yards beyond the reef. It was uninhabited, as far as anyone could tell: There were no buildings, roads, or other signs of civilization there - just a pristine, sandy beach and behind it, dense jungle.