Deep-sea shipwreck explorer looking for anchor of HMT Empire Windrush honoured - US-born David Mearns has located 29 major wrecks in a career spanning 35 years.

The astrolabe was found on a ship Esmeralda and could have been made somewhere between 1495 and 1500. Esmeralda was a Portuguese ship that reportedly sank in the Indian Ocean in 1503. The ship was ...