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Author: onepoorguy 🐝  😊 😞
Number: of 48495 
Subject: submersible
Date: 06/21/2023 4:44 AM
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I imagine most folks here know about the tourists in the missing submersible that went to see the Titanic.

https://www.nytimes.com/live/2023/06/20/us/titanic...

The Titanic is over 12000 feet down. I could probably count on two hands the number of submersibles capable of getting down there. None are close, and the crew only had about 90 hours of oxygen. They're making a show of rescuing, but I don't see how it's possible. They're hundreds of miles from the nearest land...further from the nearest submersible that could do that (Woods Hole?). Even if the banging they think they're hearing are those folks, at least half of their 90 hours is gone. Even if Alvin was on-site already, they would still have to find the lost craft (it could be anywhere within a couple square miles assuming it was on-target for Titanic), and then figure out a way for it to blow ballast. But Alvin isn't on-site, and I doubt it could be airlifted (which is the only way to deploy quickly...a ship will take a couple of days just to get there).

Not that I enjoy being a pessimist, but I just don't see it ending well. Unless I've overlooked something.

Evidently, reading the latest update, a craft named Victor is en-route. But it won't arrive until late Wed. And then it still has to be deployed. It's capable of diving to Titanic, but that is really pushing the O2 situation for the tourists. And then they have to figure out the problem (if they find the Titan), and fix it, without humans in dive suits.
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Author: g0177325   😊 😞
Number: of 48495 
Subject: Re: submersible
Date: 06/21/2023 9:33 AM
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Not that I enjoy being a pessimist, but I just don't see it ending well. Unless I've overlooked something.

Yeah, the 5 passengers are goners. If they didn't die immediately when the hull was breached shortly before contact was lost, they will almost certainly be dead in a day or two due to asphyxia. One particularly gruesome thought I had was that perhaps 3 or 4 of them decided to sacrifice themselves in order to leave more oxygen for the one or two remaining alive. That could theoretically extend survival time by many days, perhaps a week.

Life at the bottom of the ocean is just as unforgiving as life in orbit, perhaps even more so.
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Author: onepoorguy 🐝  😊 😞
Number: of 48495 
Subject: Re: submersible
Date: 06/21/2023 2:21 PM
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Yeah, if there was an actual breach, they're dead. At that depth, a leak will be like a cutting jet ripping through anything soft it encountered. More likely would be a sudden implosion, which would be quick. They wouldn't have the time to drown.

If it was loss of power, or something similar, that is less merciful. They will get cold, and may expire from hypothermia before they would asphyxiate. I agree it is comparable to being in space.
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Author: sano 🐝  😊 😞
Number: of 48495 
Subject: Re: submersible
Date: 06/21/2023 6:01 PM
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Even if Alvin was on-site already, they would still have to find the lost craft (it could be anywhere within a couple square miles assuming it was on-target for Titanic), and then figure out a way for it to blow ballast. M/i>

The sub must have some lifting eyes. There are ROVs with rudimentary arms that can attach cables/shackles/recovery hooks to things that need to be lifted.

Reportedly the last known ping put the sub in the top 180 meters (590 ft). IF IF IF that's true then IF they have a salvage capable ROV in the vicinity, then a cable/shackle could slow tow the sub while reeling in the cable until they are near enough to the surface for divers to clamp on some lift pillows to get the hatch into air. Then quickly unbolt the 17 nuts.

It's a lot of ifs and no room for error.
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