Titanic submersible confirmed destroyed with loss of all five souls onboard.

Feek · 22 Jun 2023 at 15:53

The Wiki page for communicating with subs explains it better than I can.

Communication with submarines - Wikipedia

en.wikipedia.org

The bottom line is that you ain't getting any RF down to 4km.

Colonel_Klinck · 22 Jun 2023 at 15:54

adam cool dude said:
This is going to be one of those threads that will be necroed in 10 years time when it washes up off the coast of Cornwall and some poor sod finds it washed up on a beach and peers in. That is IF it hasn't imploded.

You wouldn't want to look through the hatch at that point

mrk · 22 Jun 2023 at 15:55

Sonar is the only reliable way. Animals use it under water, submarines use it etc.

adam cool dude said:
This is going to be one of those threads that will be necroed in 10 years time when it washes up off the coast of Cornwall and some poor sod finds it washed up on a beach and peers in. That is IF it hasn't imploded.

Surely it would explode by then, the gasses a decomposing body releases are quite severe, let alone 5 of them in a confined space :| Assuming it hasn't imploded of course.

OverDrive · 22 Jun 2023 at 15:56

How much of the sub-surface search has focused directly on and around the two main Titanic wreck hull sections and debris field (inc. immediately adjacent areas)?

Junglist · 22 Jun 2023 at 15:58

and surely by 10 years, it would just be some bones rattling about. Wouldn't be that bad

Penfold101 · 22 Jun 2023 at 16:00

mrk said:
Sonar is the only reliable way. Animals use it under water, submarines use it etc.

Surely it would explode by then, the gasses a decomposing body releases are quite severe, let alone 5 of them in a confined space :| Assuming it hasn't imploded of course.

The thing was designed to resist pressure differentials of 6000 psi - a few bodies aren't going to do anything to it

Feek · 22 Jun 2023 at 16:01

mrk said:
Surely it would explode by then, the gasses a decomposing body releases are quite severe, let alone 5 of them in a confined space :| Assuming it hasn't imploded of course.

If it's designed to withstand the pressure of being 4000m down in the sea, I don't think the pressure from decomposing bodies will be anywhere near as strong.

I hate to say it but I hope it imploded. Sitting in a tube for four days waiting to die is horrible.

mrk · 22 Jun 2023 at 16:01

Penfold101 said:
The thing was designed to resist pressure differentials of 6000 psi - a few bodies aren't going to do anything to it

Designed vs certified are very different things. It was not certified by any recognised body to those depths let alone the depth of the Titanic. it just so happens it made a handful of dives without any known issues until now.

The "experimental" waiver each person had to sign was part of the deal, that they may not return to surface.

Edit* take for a example a Casio F-91W, a watch made in the 80s and to this day only designed to be "water resistant" - Yet we have people out there diving with it and swimming and it has no problems. Would you take it with you though on a dive as your only means of measuring your dive time as the watch is well known for being fine under water? Certainly not!

Demon · 22 Jun 2023 at 16:04

It should be feasible to create something using a low frequency audio transducer to effectively mimic (or as was argued over, maybe even sound out using Morse code) someone banging a hull..

You would make it battery powered, external to the pressure vessel and having it on a failsafe that is reset when you start the dive and automatically will start sounding if not reset after X number of hours.. it would sound on the half hour with depth information or similar via morse code..

Easy..

GreatAuk · 22 Jun 2023 at 16:06

Colonel_Klinck said:
IIRC radio waves travel very badly in water, even the very long wave. Sound waves however travel far better, its why they use pings. I can't imagine there is any way radio could be used to communicate at those depths.

There were reports saying it had a way of sending text messages acoustically to the surface vessel and the surface vessel sends them directions on the same system, but it seemed very unreliable and often didn't work. In 2022 they lost track of it for 5 hours (and shut the WiFi down on the ship so people couldn't tweet about it... or to preserve bandwidth for emergencies if you believe the company)

A CBS reporter who took a dive in the Titanic submersible said it got lost for up to 5 hours and that the mother ship shut off its internet so passengers couldn't tweet about the mishap

While he wasn't on the submersible when it got lost, David Pogue said, the crew cut off the internet so passengers like him couldn't tweet about it.

www.insider.com

Probably why it took them so long to raise the alarm, because they're used to losing track of it for hours at a time.

mysticsniper · 22 Jun 2023 at 16:07

The next press conference will be interesting, I wonder if it's still a search and rescue, or a recovery mission now.

PermaChanged · 22 Jun 2023 at 16:09

mysticsniper said:
So it's taken 4 days for a C-17 to turn up and load their equipment.

Yep - rumour mill here (in Guernsey) is that they've left without it due to it not fitting - that's unconfirmed to my knowledge though.

US Air Force jet collects equipment from Jersey for emergency Titanic sub search

A US military plane arrived in Jersey in the early hours of this morning to collect deep-sea equipment to help in the search for the missing Titan submersible.

gsy.bailiwickexpress.com

https://twitter.com/ilatif/status/1671831627939426304?s=20

Hagar · 22 Jun 2023 at 16:10

Iceberg posthumously claims five lives.

kakarott · 22 Jun 2023 at 16:11

Just dawned on me that they might not have working lights. Can you imagine that, all the way in the scared, angry etc and probably can't see anything.

Penfold101 · 22 Jun 2023 at 16:11

mrk said:
Designed vs certified are very different things. It was not certified by any recognised body to those depths let alone the depth of the Titanic. it just so happens it made a handful of dives without any known issues until now.

Oh I'm not saying it's safe or a good design, just that 6000psi versus the 1 or 2 psi a rotting corpse might put out isn't going to do anything.

Actually, come to think of it, it might make it even safer - the problem is enormous differential between outside and inside, and if you increase the pressure inside you reduce the differential slightly. So, a collection of decomposing bodies actually makes the thing safer by a fraction of a few percent...

Demon · 22 Jun 2023 at 16:12

kakarott said:
Just dawned on me that they might not have working lights. Can you imagine that, all the way in the scared, angry etc and probably can't see anything.

If you mean inside then Phones, cameras, and any independantly powered electronics with a display would generate some light..

Not forgetting the camping shop light on the ceiling..

mrk · 22 Jun 2023 at 16:14

Penfold101 said:
Oh I'm not saying it's safe or a good design, just that 6000psi versus the 1 or 2 psi a rotting corpse might put out isn't going to do anything.

Actually, come to think of it, it might make it even safer - the problem is enormous differential between outside and inside, and if you increase the pressure inside you reduce the differential slightly. So, a collection of decomposing bodies actually makes the thing safer by a fraction of a few percent...

I agree, the problem then being if someone does find it washed up on shore and attempts to open up the bolts, the pressure differential may well blast that hatch open as a few screws get undone maybe?

What a grim sight that would be :/

Penfold101 · 22 Jun 2023 at 16:18

mrk said:
I agree, the problem then being if someone does find it washed up on shore and attempts to open up the bolts, the pressure differential may well blast that hatch open as a few screws get undone maybe?

What a grim sight that would be :/

Nah - the moment there was a small enough gap anywhere in the seal the tiny pressure differential would release and you'd get a horrific smell coming out which would probably make the openers throw up. It might be SLIGHTLY higher pressure, but you'd struggle to notice it I think.

Demon · 22 Jun 2023 at 16:18

PermaChanged said:
Yep - rumour mill here (in Guernsey) is that they've left without it due to it not fitting - that's unconfirmed to my knowledge though.

US Air Force jet collects equipment from Jersey for emergency Titanic sub search

A US military plane arrived in Jersey in the early hours of this morning to collect deep-sea equipment to help in the search for the missing Titan submersible.

gsy.bailiwickexpress.com

https://twitter.com/ilatif/status/1671831627939426304?s=20

BBC also reporting "Efforts to send deepwater survey craft from Jersey hits snag" and it had to take off without sub..

mysticsniper · 22 Jun 2023 at 16:19

PermaChanged said:
Yep - rumour mill here (in Guernsey) is that they've left without it due to it not fitting - that's unconfirmed to my knowledge though

It's just on the BBC now.

Another aircraft is due to land later on this evening.