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O boy we are off on a tangent ,oh well .Copper and naval brass will not support alga formations .This stuff will grow whiskers 8-10 inchs long and is just like adding sand to a ball bearing as far as slowing down a watercraft . On the nuc subs they scrapped the hull about every six months or...

A little note about copper sheeting .When David Bushenell attempted to attach a time bomb to a Britsh man of war using the first known submersable the "turtle" ,it was the copper sheathing that fouled the attempt . He basically just had a woodscrew type of thing .The plan was to attach the bomb...

I have only seen live oak trees on sevaral occasions .Once in Myrtle Beach SC and when I was in Florida several years ago . Never seen any tree any where spread out like they do . How in the world did they ever cut the planking and timbers for the USS Constitution out of that stuff .:? That old...