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The World’s oldest astrolabe was found in the wreck of the Esmeralda in the Indian Ocean. Loss of Esmeralda as per Livro das Armadas.

Record Breaking Finds From Portuguese Shipwreck Confirmed by Guinness Book of Records [World’s Oldest Finds]

Experts from the Guinness Book of Records have confirmed a find to be the world’s oldest mariner’s astrolabe, a navigation device used by seamen in the past. The instrument, known as the Sodré...

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