Hetland
Contributor
According to Frank, parts of the deck were falling through, too, and he didn't think it's a safe wreck to penetrate.
What it looks like to me is that there are a few deck plates missing, but it doesn't look like they rusted through, it looks like they were blown off in a storm. You can even see plates laying on top of the deck, which would suggest they didn't rust through and fall into the structure. Of course I'm looking at them from 15ft away, so I could be wrong.
From what I've seen of the interior of the tower section, everything looks pretty solid. Again, just sticking my head in or doing swim-throughs. I'm not a structural engineer or wreck expert.
I've also talked to a few folks that do regular penetrations at the base of the tower, and just below the flight deck. All they report is regular wear and tear, which leads me to believe that it's no worse off than any wreck that's been in the water for four years or so.