Mystery surrounds sunken ships, with tales of lost treasure or historical artifacts. The topic has been popularized by the movie series “Pirates of the Caribbean,” with its portrayal of The Flying Dutchman and Davy Jones’ Locker legends. Study of submerged vessels can lead even to fascinating vacation opportunities. The Granddaddy of Sunken Ships The story of the Titanic’s sinking is the indisputable champion of sunken ship stories. “Titanic” film director James Cameron continues the story with documentary footage on cable television’s Discovery Channel of undersea efforts to study the vessel’s wreckage. The Graveyard of the Atlantic The waters off of North Carolina’s barrier islands, known as the The Graveyard of…