Missing Titan Sub! Thread 4

[Mommasgotabrandnewbag]

As thread 3 is filling up here is a new one. For the benefit of those just joining the conversation;

Thread 1
Thread 2
Thread 3

Yes we know they're billionaires
We can discuss things that are horrifying and ghoulish, thanks for your opinion.
Migrant boats are sad too

As you were 😁

I see the point made about not detecting a bang, but nobody would’ve necessarily listening on Sunday would they?

Without being insensitive and flippant, there will be resources poured into this not just for the families sake but because its really useful research that wouldn't usually be able to be conducted. Hope that doesn't offend anyone by viewing it this way, I'm sure as most on board were explorers they'd want at least something to come out of all of this.

I should imagine they died instantly. The pressure at 4 km is huge.

Just seen the 'debris field' news - if indeed it is the Titan, I suppose it's merciful it would have been over very quickly. The hull cannot have been as strong as they were asserting it to be. Poor people and their famiies/friends.

Those pour souls. This is absolutely heart breaking. I hope the families of the men sue that shoddy company.

Correct. So more likely that's when it happened.

If it’s imploded it may well be the best outcome, other than full recovery of living people. I have heard, though no expert here, that a sub implosion is usually loud and carries far in the water, leaving quite a distinctive signature, so it may well be identified by recording devices at some point if indeed that is what happened.

I’ve also read, just from the press, that there’s now some doubt about whether the banging noise picked up was human generated after it has been analysed.

SOSUS is always listening. But I'm sure there are many reasons it may have not been picked up.

Anyone ese impressed that it only took 5 hours from ROV getting to the sea bed to announcing a press conference?

Theoretically it's possible, whether it's likely or not is another matter but seen as though this craft was made for 8 hour dives (and allegedly not even stringently tested for that) it seems unlikely it was stress tested for prolonged periods. The material would have degraded each dive, so it's not wild to assume this could occur and have a huge affect over the course of numerous days of submersion. I hope not though, if the debris does turn out to be Titan hopefully whatever happened was quick.

A fellow on the Guardian seemed to think if the sub had imploded the sound would have been heard widely, and there was the mother ship above waiting for comms to be restored or it to surface - you'd think they'd hear something or register it on their equipment.

“Sound travels particularly well underwater,” Allum said. “A catastrophic implosion could be heard for thousands of miles and could be recorded.”
An implosion would likely trigger signals in military hydrophones, devices used for recording or listening to underwater sounds.

Missing Titan likely intact but out of power, says expert who designed deepest-diving submersible | Titanic sub incident | The Guardian

Debris field does not sound good, though.

I reckon the US military will be putting an order in.

The robotic craft can take samples and bring them back to the surface. I presume any Titan pieces would stand out from Titanic wreckage as the latter would be so decayed.

That's interesting. Would the sub then just sink to the bottom in one piece?

Excuse my ignorance of physics but you’re saying the vessel could have filled with water slowly. And then what would happen? It would still implode at some point? That sounds like a situation that would have been very alarming for the occupants. I had thought implosion would be sudden and without warning. If anyone can explain further, I’d appreciate it. I struggle to understand technical detail.

What are you trying to say?

I’m very surprised.

Thinking about it more I don’t think they could have been down there for long. Reading the ways the have to resurface, one is automatic if the sub is submerged more than 16 hours. And as it never resurfaced I would assume that it imploded before 16 hours. Hopefully they weren’t stuck on anything.
I think best case here is to hope it was instant and as they were on their way down so they would have had no clue or stress of being stuck at the bottom. I’m sure in the coming days we’ll learn more and more, stuff they won’t be releasing at the moment.
Guess we’re going to have to wait until 8.

The depth of the sound affects it's ability to travel up. So not only might it be that nobody was listening it could also be that it's so deep the sound cannot travel in the usual way. I think the debris has been found at some considerable depth.

Yes, US coastguards (US officials) are not hiding info the way UK officials do. In the UK, the press conference would be announced tomorrow at 10 am to take place at 2pm. Although significant discovery done today.

It looks like USA people don't like being lied to or maybe are more drawn to conspiracy theories maybe why their officials are keen to give them facts ASAP. In the UK we are warned not to speculate and that we may face criminal charges.

I'm not tbh. They knew the point where communications were lost so I expect they sent the ROV down to that spot and there it was.

It wouldn't implode. It would fill with high velocity water, pushing into all air spaces until the pressure inside is equal to that outside and stop, like an opened beer bottle resting at the bottom of a lake.

The CEO was one of the inhabitants of the sub....

SharkSip · Today 14:25

I was thinking why was there no GPS or tracker on the sub.

There was an acoustic positioning beacon on the sub, which is what has been recording as failing. The pings are picked up by a set of receivers on the ship and a position calculated for the beacon and hence, the sub.

The subsea receiver is then referenced to GPS, by inputting vertical and horizontal offsets from the ship's GPS receiver/s. If the beacon were operational, an ROV could do a vertical dive, directly to the stricken sub.

If these had been five teenagers who had built a sub in their garage and gone down into Poole harbour would there be this level of publicity?

In the UK, yes, at least as much if not more, rest of the world - unlikely.