I had heard about this long ago,, and never had the opportunity to see the footage. That was funny!
I guess nobody thought to hook a tow cable to it,, wait for high tide, and have a tugboat pull it back out into the sea. Then,, if you wanted it to sink & all, you could place a few smaller charges in it & blow it,,, or heck. Just put a temporary anchor on it, and let the sea creatures devour it.