In a storm, the ship could be driven on to land and severely damaged or sunk.
VOA: special.2009.12.23
The fourth man was the captain of the ship that had sunk.
VOA: special.2010.03.06
The team from the University of Rennes in France say they found the crystal while examining the wreck of a British shipsunk off the island of Alderney - in the English Channel - in 1592.