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Debris found came from missing Titan sub, says friend of passengers

bbc.com

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Re: Debris found came from missing Titan sub, says friend of passengers

#51

RIP to these guys, yes it was a risky trip. But it was into international waters and they were AFAIC explorers. Stuff like this can not be done without risk. Hopefully future subs will have more safety features.

I might feel this way to the first people to land on Mars or something. This was not a "mission" to advance human knowledge. To me, it's one step away from "hold my beer"

Re: Debris found came from missing Titan sub, says friend of passengers

#52
post #8

Earlier quoted context omitted.

Seems likely, there's no point revealing classified capabilities in this context.

There's a lot of unclassified information about their historic capabilities, I'm pretty sure they can give a lot of detail without leaking anything not already public. https://en.wikipedia.org/wiki/SOSUS https://www.amazon.com/Red-November-Inside-U-S-Soviet-Submar...

A timely response conveys something about how fast we can locate something underwater.

Re: Debris found came from missing Titan sub, says friend of passengers

#54
post #6

I wonder if U.S. agencies (e.g. the Navy) had picked up the sound of the implosion days ago, back when the Titan was said to have lost communication, and knew all this time that the Titan had likely already been destroyed. But there's no incentive for them to publicly say anything, as it would hint to their underwater surveillance capabilities. And the "rescue effort" is good practice for their crews. I watched most…

Ya but even so they could have sent rescue ships there because "we think it could be here" - nothing given up.

It gives up bounds on how fast we can locate something.

Re: Debris found came from missing Titan sub, says friend of passengers

#55
post #42
post #9

Earlier quoted context omitted.

There's little other explanation for why contact would be abruptly lost. The company said that the sub has multiple forms of ballast, including systems that could be activated manually, and ties that were designed to dissolve after 20+ hours in seawater, allowing the sub to rise even if the crew were unconscious. > The latter is more probable to me as it has never been tested under water for more than a few hours at…

> That's not true, they've successfully reached the Titanic several times over a dozen or so expeditions. This is more concerning, given that metal fatigue is an understood phenomenon (1). (1) https://www.faa.gov/lessons_learned/transport_airplane/accid...

It's a carbon fiber hull, for which I think we know alot less about repeated stress events...

Re: Debris found came from missing Titan sub, says friend of passengers

#56
post #4

Based on this it seems pretty likely that it immediately imploded and the ‘banging’ was from the Titanic debris itself.

Why is it more likely that it immediately imploded rather than after a few days? The latter is more probable to me as it has never been tested under water for more than a few hours at a stretch. This will also be consistent with your banging hypothesis which was only heard after a day or two when it got lost. And also with the fact that no immediate sound disturbance was registered with the controlling ship. I of cou…

If the stories about some parts only being certified to 1.3km instead of 4km are true then it was probably operating closer to the yield point than ideal. My guess is that metal fatigue started to become an issue and it failed too quickly for anyone to react.

If the were too cheap to design and build it properly then they were too cheap to check for wear and tear properly.

Re: Debris found came from missing Titan sub, says friend of passengers

#57

Earlier quoted context omitted.

Would the implosion have been loud enough? I mean the thing was a tiny 7x3m cylinder located 700Km from the nearest coast...

How do submarines commonly fail? Is the assumption of a violent implosion warranted? I would think another failure mode could be water rushing in without the overall structure catastrophically failing, which would actually relieve pressure on the structure as it happened and be much less energetic.

Just note that the body was experimental: while the hull indeed have a thick titanium body, it was mixed with (don't know exactly how and where though) carbon fibers, which are known to catastrophically break under pressure if there's even a microscopic impurity or damage. At least that's what the experts say. Carbon fibers is great for lightweight things that need to bend, terrible for things to be relied under pressure.

Re: Debris found came from missing Titan sub, says friend of passengers

#59

RIP to these guys, yes it was a risky trip. But it was into international waters and they were AFAIC explorers. Stuff like this can not be done without risk. Hopefully future subs will have more safety features.

I feel bad for the 19yo who had a whole (well-funded) life ahead of him. He was probably trusting the older adults to know what they were doing.

Re: Debris found came from missing Titan sub, says friend of passengers

#60
post #6

I wonder if U.S. agencies (e.g. the Navy) had picked up the sound of the implosion days ago, back when the Titan was said to have lost communication, and knew all this time that the Titan had likely already been destroyed. But there's no incentive for them to publicly say anything, as it would hint to their underwater surveillance capabilities. And the "rescue effort" is good practice for their crews. I watched most…

That’s conspiracy thinking. The absence of your question being addressed doesn’t mean it’s plausible. The ocean is generally a noisy place, and the activities of a small submerged vehicle likely won’t raise notice without active listening.

What's the conspiracy? That Coast Guard officials declined to say any more than is necessary?

Yesterday the Coast Guard spokesman [0] said he hadn't even heard the notion that the banging noises were made at regular 30-min intervals, even though Rolling Stone published a leaked DHS report the day before [1], something which completely dominated the news coverage and gave people hope that there were survivors. When directly asked about most anything, the officials frequently demurred. Giving out the least amount of info necessary is their standard operating procedure, not a conspiracy

[0] https://www.dvidshub.net/video/887852/coast-guard-partners-h...

[1] https://www.rollingstone.com/culture/culture-features/titani...

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