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astrolabe

World’s oldest astrolabe found, says shipwreck hunter

LONDON: A British-based shipwreck hunter said Tuesday a navigation tool he found that guided Portuguese explorers on a perilous voyage to India in the 16th century has been confirmed as the world's oldest astrolabe. David Mearns found the bronze disc during a dive on a shipwreck off the coast of Oman in 2014 but said Warwick University had only recently confirmed what it was after laser scans revealed etches on it. "I knew immediately when I saw it that this was a very, very important object. I could see the royal coat…