M60 tanks undergo a thorough cleaning before use as reefs
The Artificial Reef Program used four types of obsolete Army armored vehicles as artificial reef materials off the New Jersey coast. These were cleaned at local military bases, loaded onto barges for transport, and pushed off at their final destination. Once the Army had disposed of its excess inventory, the program ceased, around 1999. The Artificial Reef Program has sunk almost 400 tanks altogether, far too many to list them here in this website.
Actually, the shape of things that have come. While re-doing the artificial reefs charts, I refined and extended the mapping plugin to the point where it seemed like it could do the shipwrecks charts as well. There is a structure and order to the artificial reefs while the shipwrecks are a big jumble, but I figured I'd give it a try, and it worked.