NTHP, good thought. They may come in useful if and when the Navy allows anyone to do anything, right now their attitude is that the cannons are theirs and if they want to let them crumble into dust, they can do so, and no one can stop them.
What I have to do is get the right people in the right positions either in the Navy or in its money chain interested in this. When the Navy finds out is spending more manpower answering letters from Congress etc. than it would take to do something with the cannons, then they may do something, or let someone else do something. Right now they won't even let their charitable arm, the Naval Historical Foundation, collect money for an effort to save the cannons. I found that out last week when I asked the Foundation about helping.