copper sheathing

[hmmm]

i found a spot that looked like a small boat was parked there . i found a copper sheathing , what era did they use copper on the bottom of boats. sorry no camera, no picture.

 

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[Mackaydon]

Copper sheathing began being used on wooden ships as early as the 1790s.
http://www.referenceforbusiness.com/industries/Primary-Metals/Rolling-Drawing-Extruding-Copper.html