Titanic tourist sub missing

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kingdragonfly

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#306019 21-Jun-2023 10:45

Re missing Titanic tour submarine, Worst case is it may have got fouled/snagged with some lines/chains/nets on the Titanic

The Titanic, and potentially the sub, are 3.8 KM below sea level.

I read a divers in an hard suit, atmospheric diving suit, dives is 0.7 KM.

I heard the sub's hatch is incompatible with standard military rescue sub hatches.

I'd guess it makes it hard to rescue if opening the door would instantly kill everyone inside.

Pogue: Missing Titanic tour submarine ‘constantly plagued by mechanical errors’

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#3092942 21-Jun-2023 10:53

Any rescue of this Submersible first requires it to be found......

To quote a line from Billy bob Thornton in Armageddon - [substitute ocean for sky where appropriate]...

"Well, our object collison budget's a million dollars, that allows us to track about 3% of the sky, and beg'n your pardon sir, but it's a big-ass sky."

Rikkitic

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#3092960 21-Jun-2023 11:19

For no real reason I immediately thought the sub had imploded. That is why they can't find/hear anything. It would be a mercy for those inside.

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Eva888

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#3092961 21-Jun-2023 11:20

I was reading about the slow death and panic they would suffer. Imagine watching your co buddies dying next to you as you sit waiting for your own death. One pair is a father and 19 year old son.

Reporting them lost was left too long. They are a tiny speck deep in the dark and unlikely to be found unless miracles happen. Very tragic.

Canuckabroad

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#3092969 21-Jun-2023 12:06

I haven't heard anything about it today, but I believe they were looking to bring another ROV to the area so they could search underwater as at present they are only searching with the support ship and several aircraft (the sub is meant to have ballast which can be dropped and have it surface if required which would mean it would be bobbing on the surface). As suggested there are other possibilities that it is entangled or suffered a catastrophic failure where the only way to find them is to go down and look.

If this ends up in the worst-case scenario, it's another sad addendum to the Titanic story, where more people perished in what is effectively eco-tourism of the original wreck. I know they claim that all the passengers who have paid to be there are going to 'do science' they don't have a scientific background; it's effectively a pilot to get them down and back, and 4 others doing some light observation and measurements so they can feel like they're doing something more than just peering out the windows.

gzt

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#3092975 21-Jun-2023 12:26

Worst case is it may have got fouled/snagged with some lines/chains/nets on the Titanic

That's almost the best case. Worse cases might be fire, o2 failure, pressure failure, it's not pleasant to think about at all.

gzt

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#3092994 21-Jun-2023 12:58

Best case might be they've surfaced safe and sound some distance away with a radio failure and waiting for a plane to spot them. That's a lot nicer to think about..

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cddt

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#3092996 21-Jun-2023 13:00

Seems to have been a little too much "DIY" going on... https://www.1news.co.nz/2023/06/21/watch-reporter-visits-titanic-tour-sub-notes-improvised-parts/

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Silvrav

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#3093000 21-Jun-2023 13:05

Suppose to have 7 failsafes to bring the sub to the surface in case something goes wrong...makes me think there was a catastrophic failure of the ballasts and an implosion.

My question, with this kind of mission (deepest commercial dive) why is there no remote monitoring of the sub and the team members?

Canuckabroad

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#3093003 21-Jun-2023 13:09

I would assume they didn't have more detailed monitoring in place because of cost; potentially because it may be difficult to send a constant stream of data back from the sub when they are far below the surface since they don't have an umbilical back to the ship. I expect underwater comms are more complicated than what airplanes need to deal with.

Canuckabroad

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#3093005 21-Jun-2023 13:13

I just read this as an update:

CBS News journalist David Pogue, who travelled to the Titanic aboard the Titan last year, said the vehicle uses two communication systems: text messages that go back and forth to a surface ship and safety pings that are emitted every 15 minutes to indicate that the sub is still working.

Both of those systems stopped about an hour and 45 minutes after the Titan submerged.

“There are only two things that could mean. Either they lost all power or the ship developed a hull breach and it imploded instantly. Both of those are devastatingly hopeless,” Pogue told the Canadian CBC network on Tuesday.

cddt

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#3093006 21-Jun-2023 13:14

Silvrav:

My question, with this kind of mission (deepest commercial dive) why is there no remote monitoring of the sub and the team members?

They're using an xbox controller to manouvre the submersible. The headset that came with the xbox proved to be insufficient for comms.

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surfisup1000

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#3093010 21-Jun-2023 13:21

Silvrav:

Suppose to have 7 failsafes to bring the sub to the surface in case something goes wrong...makes me think there was a catastrophic failure of the ballasts and an implosion.

My question, with this kind of mission (deepest commercial dive) why is there no remote monitoring of the sub and the team members?

Probably physics. Sonar has a limited range. Radio waves do not pass through water.

The only real way might be to tether the sub.

I'd suppose one safeguard could be to dive in pairs , where each vessel can be used as rescue craft for the other. ie, they have a docking mechanism that allows passengers to transfer under high pressure.

In future, I've wondered whether cosmic rays could be used to communicate through the earth/water. They are difficult to detect , but maybe future technology will solve this.

plas

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#3093011 21-Jun-2023 13:22

gzt: Best case might be they've surfaced safe and sound some distance away with a radio failure and waiting for a plane to spot them. That's a lot nicer to think about..

Pretty sure its bolted closed from the outside with no way to open from the inside, so not much better.

Silvrav

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#3093013 21-Jun-2023 13:31

Canuckabroad:

I just read this as an update:

CBS News journalist David Pogue, who travelled to the Titanic aboard the Titan last year, said the vehicle uses two communication systems: text messages that go back and forth to a surface ship and safety pings that are emitted every 15 minutes to indicate that the sub is still working.

Both of those systems stopped about an hour and 45 minutes after the Titan submerged.

“There are only two things that could mean. Either they lost all power or the ship developed a hull breach and it imploded instantly. Both of those are devastatingly hopeless,” Pogue told the Canadian CBC network on Tuesday.

Yet they waited hours after its 12hour due time to start looking into it? That's negligent if this is true.

ezbee

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#3093024 21-Jun-2023 14:05

Suppose CBS New Journalist David Pogue can forget ever buying lotto, as he has had his one big stroke of luck.

It was said to be normal to lose communication at Titanic depths with this system.
So not a particular alarm this time, its uncertain if this applied to the everything ok pings.

Carbon fiber construction is tricky as you are dealing with matrix of carbon fiber and resin, so resin has a say,
and you are cycling from low to extreme pressure environment in water repeatedly.

Company had two other different submarines, but they did not rate to Titanic depth, so this is a unique experimental device.

The waver form did say this was experimental and high risk of death if anything went wrong.

The Titan Tragedy
Sub Brief
https://www.youtube.com/watch?v=4dka29FSZac

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