On July 19 1545 the English fleet sailed out of Portsmouth to fight off the
French. There are lots of ideas about why the Mary Rose sank, but no-one is
quite sure. Only about 30 men survived from her crew of over 400 men.
To conserve the timbers of the Mary Rose they were washed in clean water
for 12 years. Since then they have been sprayed with a special mixture of
wax and water to make them stronger. When that is finished the wood will be
dried out, and the Mary Rose will be preserved forever.