Wood that has remained in water for a long time,usually lying at the bottom of the sea,at the bottom of a lake, a river or well, is called infused wood. The water affects the cells of the wood so if it dries out it withers and crumbles.In order to avoid this hazard, two methods of stabilizing the saturated wood with chemicals are used. On Greek territory the ships that have been the object of study are exclusively ships of antiquity and Byzantine craft, while wrecks of the Greek revolution of 1821 remain unexplored. A fascinating example of the salvaging and restoration of a shipwreck is that of the ship Wasa.It went down in the port of Stockholm in 1628 and was brought up in 1960.