Tuesday, December 15, 2009

What material does the earliest practical submarine made of?


One of the earliest submariens that was built was made of wood and covered by a grease leather. It was built by a Dutchman Cornelius van Drebbel and was tested in the 1620's below the surface of the Thames River in England.  It requires a twelve Oarsmen to rowe the wooden boat and successfully submerged and maneuvered  at a depth of 12 to 15 feet below the surface.