Knowledge of metal corrosion and its prevention are vital for the safety and integrity of a boat. The third edition of this unique book is for boat owner and boat builder alike, giving advice on how to prevent or at least reduce the corrosive effects of seawater. In this edition more attention is paid to electrolytic corrosion as nowadays many more people plug into a shore supply. Modern super sealants, copper sheathing and chromium plating are examined, as are engines, outdrives and even mooring chains, since these are just as vital to a boat's security as the rudder stock. Finally, there are tables showing the corrosion rates of different metals in fresh and salt water.