User blog comment:Unownshipper/Metallurgists Wanted: Rapture's Natural Resources/@comment-24769282-20140810040047/@comment-75.36.139.103-20140811134653

The taking metals  from wrecks (mainly steel) would be good if not for how few there were/widely scattered in such a large ocean and the difficulties recovering (deep-sea work, more than a little manual labor or special machinery, transport the distance to likely 'wrecks') that made it expensive/inefficient.

More I consider it,  stockpiling of surface sourced/produced materials would be far cheaper/efficient.

Buy a bunch of old surplus ships and sink them near Rapture ? Might as well ship the materials themselves using Ryan's fleet of freighters and skip the extra in-sea work.