The Captain said it had a hole in the hull that required constant pumping. I believe he stated it was 30-40 years old.

I found this video with a Explosives expert who breaks it down pretty nicely (the guy in Blue) The other guy (The Jim Carey wanna be) should have stayed home.
If you can get thru the first BS, it's helpful, after guy in blue is done with his explanation most of it to the end is just more BS.
Anyway here it is: