Divers,wreckinvestigators,andarchaeologists,tellthestoriesofthefinalmomentsofshipsandthoseonboardExaminingtheevidenceinthewreckage,withstateoftheartCGIandthelatestunderwatertechnology,andcombiningitwithpowerfulpersonaltestimony,bringsoutthehumansideofthesetragedies,aswellasansweringthequestionsofwhathappenedandwhy