Site 2-04-8MO02343: A piece of copper sheet is found fused to the sea bottom at the site of a shipwreck believed to be the Havana-based pirate slave ship *Guerrero*, sunk near Key Largo in 1827. This piece is likely a remnant of copper sheathing used to protect the lower part of the ship from shipworms and fouling. A copper-alloy tack sits on the piece, evidence of the type of fastener used to attach the copper to the ship’s hull. This same feature was rendered earlier with images taken in 2012 (see https://skfb.ly/6pwSy), but this newer render is much clearer. Model created June, 2019. Scale = 5 centimeters.