Very cool. I don't know what to think of these projects. It sounds like a great idea on the surface, but then you find out the thing has toxins that someone says will "leach out over 100 years and pose no threat to marine life". And how much damage did this event inflict on the sea life that now lays underneath it. Yes, it will be a great place to visit at some time, but that will be quite a few years down the road. And that's only if the reefs haven't "boiled" from global warming. It seems like the government may have found a new dump. JMO
This is for the Nimitz class but I think you get the picture that 212 feet is barely deep enough.
"The height from keel to mast is 244 feet (~74m), the height of a 24 story building. The deck length is 1,092 feet (333 meters), with a width of 252 feet (77 meters). An aircraft carrier can be thought of as a horizontal skyscraper floating on its side."
The government and private parties have been sinking ships and forming reefs for many many years. This is not a new idea by any means. Also remember that everything we bury in the ground effects the water too eventually. Personally, I would rather them strip these ships and sink them than to bury them in the land somewhere. At least they form new reefs in the ocean. Also, most ships are sank where their is a need for more reef formation. The impact below would be very minimal. As far as height goes, one of the sailors referred to it as a "small" vessile. Maybe a sight has some specific specs on it. It would be interesting to know.