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USS Constitution’s 1795 white oak keel
USS Constitution’s 1795 white oak keel, exposed during the ship’s 2015-2017 dry docking. Today, the ship’s below-the-waterline copper sheathing is replaced approximately every twenty years; the copper sheathing in the photo covers the false keel which is a protective wooden layer for the bottom of the keel. The dark angled line upper left is one of the keel’s four, twelve-foot scarf joints. Margherita M. Desy, Naval History & Heritage Command Detachment Boston.

Photo by: Courtesy |  VIRIN: 220919-N-IP911-0002.JPG