More than 153 years after it was lost in a violent collision at sea, NOAA and partners have identified the wreck of the ship Robert J. Walker, a steamer that served in the U.S. Coast Survey, a predecessor agency of NOAA. Today on Diving Deeper, join the Office of Coast Survey's Vitad Pradith and Office of National Marine Sanctuaries' James Delgado as they describe their journey to find the Walker.