Titanic tourist sub missing

[Darat]

And that's with just one atmosphere of pressure.

 

[Planigale]

I saw a head line referencing this as a 'sub tragedy'. Presumably this is a level below a full tragedy?

 

[Lplus]

And that's with just one atmosphere of pressure.

yep, though of course the tank car would be much thinner material.

 

[shemp]

There's youtube short showing a tanker railcar under vacuum and it's sudden collapse.

FTFY.

 

[Tero]

It's not clear to me how you send any messages underwater. Xbox controller or not.

“There’s a text-based communication system that’s two-way, very slow,” he said. “I mean, when you’re sending signals through that amount of water, it’s very, very difficult.”

Mike Reiss, a writer and producer who has worked on “The Simpsons,” told ABC News he went on four 10-hour dives with OceanGate, including to the Titanic. The crews lost communication with the host ship each time.

https://www.nbcnews.com/news/us-new...ts-safety-issues-submersibles-exped-rcna90582

Regular submarines.

Submarines use very low frequency radio waves for communication when submerged. Radio waves are absorbed quickly by seawater, and the deeper a submarine travels, the more water those radio waves need to get through. Very low frequency radio waves can only travel a few tens of metres. Submarines can deploy buoys equipped with antenna closer to the surface to enable them for communication when they are deeply submerged.

https://www.ofcom.org.uk/news-centr...s use very low frequency,a few tens of metres.

 

[Lplus]

FTFY.

 

[Jack by the hedge]

If they weren't charging anyone for the trip with wouldn't need to be regulated.

If they weren't charging anyone for the trip there wouldn't be any trip. All that super-valuable science the not-passengers were doing would just have go undone.

That they got away with charging all their paying passengers a quarter million (or whatever it was) while pretending they weren't passengers but rather mission specialists crewing an experimental craft on a test voyage, well that's a curious state of affairs.

 

[Myriad]

It's not clear to me how you send any messages underwater. Xbox controller or not.

A modulated (probably frequency modulated) sonic signal, that carries well enough through a mere few miles of water. Though the signal quality and reliability is affected by the changes of temperature, salinity, and current at different depths. It's too low bandwidth to carry voice, but it can carry text. Think of an old school 110 Baud acoustic modem.

The game controller is for the propulsion. I assume one or more of the several other screens arranged around the cabin displays the messages.

It appears the transmission capabilities are asymmetrical between the submersible and the mother ship. The mother ship can carry a larger, higher-power transmitter (underwater "loudspeaker") so it can send complete messages to the submersible, while the submersible is a bunch of wreckage scattered in a debris field so it can't do much of anything usually only "pings" back.

 

[JayUtah]

OK seriously, can the media scale their coverage of this back a bit. CNN has been almost nothing but oceangate this morning.

I find this a lot more palatable (though saddening) than wall-to-wall coverage of Donald Trump.

 

[Chris_Halkides]

unfortunately true

Just saw a heartbreaking tweet, but unconfirmed. Seems the 19 yr old was "terrified" of going in this thing but that he went as a Father's Day thing because his rich dad was so excited about it.

See comment #471, which links to a story at the Independent, not the original interview at NBC. His dad was a big Titanic buff. "Azmeh recalled that Shahzada was "absolutely obsessed" with the Titanic from a young age. When they were kids in Pakistan, the Dawood siblings would constantly watch the 1958 film "A Night to Remember," a British drama about the sinking of the cruise liner."

 

[JayUtah]

I've read quite a few articles and the likes about Cameron's interest with deep-sea diving, and it does seem as if he has extensive knowledge and understanding of deep-sea diving.

I'm satisfied with Cameron's understanding of both the practical and theoretical engineering challenges of deep-sea diving. He has been heavily and enthusiastically involved in the engineering of the equipment he uses for many years, and has trusted his life to those exercises more than once. That his formal training and initial experience was in filmmaking doesn't really bother me. I've known quite a number of engineering auto-didacts, and while they aren't licensed and therefore can't actually practice some kinds of engineering, they generally impress me with their ability to grasp even the difficult concepts.

 

[Regnad Kcin]

And they cried when they saw his bravery!

Big, burly guys with tattoos on their forearms eating spinach and tooting their corncob pipes.

 

[autumn1971]

And that's with just one atmosphere of pressure.

Probably ninjad, but the differential pressure is what’s important, so it was much closer to the differential in the deep sea.

 

[Jack by the hedge]

Probably ninjad, but the differential pressure is what’s important, so it was much closer to the differential in the deep sea.

Can't quite decide what you're saying there. Yes, it's the differential pressure that counts, but the rail tanker collapsed with < 1 atmosphere of difference. The sub faced something more like forty atmospheres difference.

 

[bruto]

I've only just seen this video; but it claims that Nargeolet was present on every dive and implies he had some kind of guide or instructional role. At first I'd assumed he was just another passenger but it looks like he was actually an employee of OceanGate, so there is your stake.

By the way I highly recommend everyone watch this video if you haven't seen it already. It's the promotional video for the expedition.



Despite the almost protest-too-much emphasis of the promo, this very much was tourism and absolutely was not science, "citizen" or otherwise. I have been unable to find evidence that any of OceanGate's Titanic expeditions have collected or shared any data or findings of scientific import. It's purely a LARP.

I interrupt my viewing of this puffery to note that what I think I counted as the 11th word in the introduction was "safely." Oops.

 

[Lplus]

Can't quite decide what you're saying there. Yes, it's the differential pressure that counts, but the rail tanker collapsed with < 1 atmosphere of difference. The sub faced something more like forty atmospheres difference.

a lot more than that - more like 400 atmospheres.

 

[shemp]

Hopefully, this story will die out in another week or two, and we can get back to more important matters like Hunter Biden's laptop.

 

[Steve]

Hopefully, this story will die out in another week or two, and we can get back to more important matters like Hunter Biden's laptop.

It went down with the ship.

 

[Jack by the hedge]

a lot more than that - more like 400 atmospheres.

Oops. Yes. About 1 atm per 10m depth so... then my mental arithmetic imploded.
NB: Don't let me design your submarine for you.

 

[Cat Not Included]

Can anyone clear up something that I feel like I've seen inconsistent info on? Had the Titan sub actually made it to the Titanic and back on previous trips or not? At first I thought it had, but now I feel like I've seen stuff saying it only tried once previously and had to turn back, and the other trips I'd seen were referring to Oceangate going to different and presumably less deep wrecks.