I once met a man who worked on salvaging the Cairo in 1956. He recalled that he and several others were in the interior of the hull handing up live shells to others, who carried them up the slanted deck and piled them on the bank of the river. All of a sudden they heard a loud thud. Then, as they held their breaths, "roll-roll-roll-roll-roll-roll-roll-clunk!" I don't remember that he said what they did to the person who dropped that shell.