I read an older book about treasure hunting type salvage, and they noted that in some areas the bottoms were covered with steel scrap. At that time, it was obviously not economical to recover, other than a few special instances such as the German fleet at Scapa Flow. Scuttling of the German fleet in Scapa Flow - Wikipedia, the free encyclopedia.



I have to imagine that today, you would be better off piling up steel than chasing dreams of gold and jewels.