re: Titanic tourist submarine goes missing

The bonded interface between the titanium and carbon fiber is definitely sketchy. The videos with them just smearing the bonding agent on by hand in a normal warehouse look like a back yard bondo job. You would have thought they would have done it under more a controlled environment and with greater precision at least. That interface was pretty much garmented to be the weak point.

I just can't get over the plexiglass viewport. The maker would only certify to 1300M but this "genius" repeatedly takes it to 3 times that. If the viewport failed the resulting implosion could have blown out the flange/mounting hardware.

Hopefully they found enough to give a definitive answer to the cause even though it may be difficult since there seems to be several realistic failure points/design flaws.