Racedo,
Your scenario is not remotely plausible and you under estimate massive difficulties at every step...but I tell you what...I'll buy it.
Now give it a probability.
I'll give it 0.01%
and I give this...
That said, my bet is they're all on the bottom of the ocean
99.99%
And I really hope and pray that I'm wrong and one of these fantastical scenarios that has the souls on board still alive is actually being played out.
Enough said, the circumstances will emerge eventually.