Garboard streak

from The Collaborative International Dictionary of English v.0.48

Garboard \Gar"board\, n. (Naut.)
   One of the planks next the keel on the outside, which form a
   garboard strake.
   [1913 Webster]

   {Garboard strake} or {Garboard streak}, the first range or
      strake of planks laid on a ship's bottom next the keel.
      --Totten.
      [1913 Webster]