 The wreck was also visible in March 1983, when National Park Service archaeologist James Delgado documented the site with fellow archaeologist Martin T. Mayer.The wreck was exposed in May 1984 to a hitherto unseen degree, at which time Delgado and a larger team returned to document more of the hull.That project determined the ship was nearly half intact (45%) from the keel to the 'tween deck level, was still partially sheathed in "yellow" or Muntz metal, and was ballasted with rocks from San Francisco's Telegraph Hill.