He read historical documents written by past explorers, prisoners of war,pilots, and ship wreck survivors.

VOA: special.2010.02.24

Buoys have been placed around the wreck of a ship which sank off the Devon coast to mark an exclusion zone.

BBC: Sinking vessel

It was a wreck of a cargo ship, running freight over Europa and the Orient.

NPR: Excerpt: 'Skybreaker'

The team from the University of Rennes in France say they found the crystal while examining the wreck of a British ship sunk off the island of Alderney - in the English Channel - in 1592.

BBC: 'Viking sunstone' found in shipwreck