I don’t think so. Most have become reefs................
The reason that I asked is that about 25 years ago at least one of the “cement ships” was still in the Pacific “Inter-island” trade, according to a commercial marine newsletter.
(I once even knew the ship’s name but “I’ve slept since then.”)
Off of our TX coast there are at least two such ships, that were sunk & are part of an artificial reef.
(Believe it or not, TP&WD biologists say that marine life starts “moving into” the new “underwater structure” within 24 hours of a ship/tank/truck/car body being sunk.)
yours, satx