US Coast Guard tweet follows media reports of 'banging sounds'

A lot of the morbid interest in this story reminds me of the Tool song “Vicarious”

https://youtu.be/h_TUP2vuaDs

Eye on the TV 'Cause tragedy thrills me Whatever flavor It happens to be like "Killed by the husband" "Drowned by the ocean" "Shot by his own son" "She used the poison in his tea" And kissed him goodbye That's my kind of story It's no fun 'til someone dies

I'd expect a tourist sub to have emergency tanks that can be emptied using simple mechanical means when the sub loses maneuvering capability; maybe even a dead man's switch that causes the sub to resurface. And I'd expect emergency resurfacing actions to release buoys with beacons. So my assumption is that the sub got crushed or is stuck in the wreck of the Titanic. Which means there is no help possible and they are lost already.

But maybe I wildly overestimate the sophistication of their rig?

I also don't understand why they wouldn't operate on a tether, but maybe that was too expensive?

So I was wondering – are the militaries that are helping in this concerned at all about disclosing capabilities?

Like, by the fact that a Canadian (NATO) aircraft picked up some sounds at (presumably) 12,400 feet depth, giving away a capability that they are able to hear sounds at that depth? Or are people in this "industry" (submarine warfare) probably already aware of all this from decades of cat and mouse technology games?

I certainly hope they’ll be rescued but at nearly 4KM down it seems unlikely.

Still, never know what the navy has in its bag of tricks.