People have been spitballing on this problem for generations, and that latter one’s been tried too… problem is it’s effectively the same thing as trying to pinpoint a diver by her bubbles; if she’s near the surface, works great… if she’s 4KM down then the bubbles hit the surface spread effectively randomly over hundreds and hundreds of square kilometers, and usually kilometers off horizontally.
The best way to maintain communication with a submersible is a tether. The best way to know the position of a submersible is a tether. The best way to raise a submersible in trouble is a tether… this company chose to go another way. And, let’s be clear, even if they knew precisely where it was the odds are very good that they couldn’t possibly effect a rescue.
The grim truth is that everyone aboard is already dead, the hope is that it was a sudden implosion rather than slowly freezing, drowning, or asphyxiating.
