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

bbc.com

121–130 of 1001 posts

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

#121

Earlier quoted context omitted.

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

I could imagine a cost-benefit analysis making sense here. - Pro: increased chance of saving a few people's lives - Con: risk of leaking info about U.S. sonar sensitivity I.e., the decision would depend on the magnitude of the "pro" and "con" probabilities.

Also - Pro: Excellent realistic training opportunity to maintain and upgrade skills

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

#122
post #89

Why has this sub been so hard to find? I keep seeing reports that they've search an area "the size of" Massachusetts or Connecticut. Shouldn't OceanGate have recorded the exact coordinates where it was released and then been able to localize its possible location to a small area around that by modeling ocean currents or something? My understanding the Titan was designed to sink to the bottom and could only move very…

because the distance is so far that the sub even departing a few degrees from its intended destination means it can be anywhere along a huge swath of the sea floor, plus it's pitch dark and very far and cold and inhospitable to both human and machines.

drop a penny into a swimming pool vs drop it into the ocean.

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

#123
post #53

If it did implode in multiple pieces it means the experts were right; many said that carbon fiber was a poor choice because while it's light, it breaks like glass, contrary to steel which tends to "open" slowly.

Carbon fiber seems like a weird choice for this application anyway because its big advantage is in its tensile strength compared to its weight. Here, it’s in compression, not tension. And its light weight doesn’t matter.

I don't know and I'm not an SME, but it would seem weight always matter? For carrying, for bubbling up, etc.?

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

#124
Complete speculation: They wanted to see something very very upclose through the glass. While getting in close they managed to scrap some wreckage compromising the carbon fiber body leading it to break and implode. The banging noises are some of the equipment dangling on the Titanic wreckage and blowing in underwater currents occassionally.

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

#125

This story is weird to me Considering the current geopolitical weather and the presence of Russian submarines, you'd think the US army would be able to locate the missing object in no time, even with a triangulated location, they failed Worrying times

Military submarines don't go this deep.

Are you sure about that?

https://www.livescience.com/chinese-submarine-record-dive.ht...

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

#126

Earlier quoted context omitted.

This is something I'd also like to know. I'd assume they were assuming a worst case scenario of something like a ballast malfunction paired with a propulsion malfunction, so you have a partially buoyant (enough to stay off the ground, not enough to surface) craft being pushed both by currents, and possibly its own propulsion, in an unknown direction in some radius outside of the Titanic. I've no idea of the depth son…

Ever use a fish finder / depth finder? A narrow beam is sent in one direction, generally down, and reflections back are calculated. I would imagine that was the start of their search. After enough time or support: military grade sonar? https://man.fas.org/dod-101/navy/docs/es310/SNR_PROP/snr_pro...

Yip, but the issue is the depth. The Titanic's at 3800 meters. An average military sub isn't going to hit 1000 meters. So I'm reluctant to make any assumptions about deep search systems.

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

#127
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…

I'd imagine that location is the second most acoustically monitored part of the Atlantic (looking for ruskie subs coming from the north). https://en.wikipedia.org/wiki/SOSUS

What's the first?

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

#128
post #89

Why has this sub been so hard to find? I keep seeing reports that they've search an area "the size of" Massachusetts or Connecticut. Shouldn't OceanGate have recorded the exact coordinates where it was released and then been able to localize its possible location to a small area around that by modeling ocean currents or something? My understanding the Titan was designed to sink to the bottom and could only move very…

They looked on the surface because they didn't have anything that could go down to the Titanic. A ship with an ROV that could go to the Titanic arrived and they found the debris on the sea floor.

Right. It's my understanding that two remote submersibles that arrived earlier were lost trying to reach the sea floor—they weren't rated for the depth but the attempts were made anyway. (Don't have a link, I think it was nytimes)

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

#129

Earlier quoted context omitted.

Military submarines don't go this deep.

Are you sure about that? https://www.livescience.com/chinese-submarine-record-dive.ht...

That is a submersible. Military submarines (things that can travel thousands of miles, support themselves, have weapons, etc) appear to bottom out at ~2000m. At least one US military sub imploded well above 2000m.

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

#130

It's not clear from the headline - but the debris field is on the ocean floor and was found via the USGC's remote operated submersible vehicle.

Yes on the sea floor but according to BBC: > Debris patch was found by an ROV from the Horizon Arctic, a Canadian commercial vessel which arrived last night near the Titanic wreckage site. > It was loaded with support equipment and was also carrying an Odysseus 6k ROV that can reach depths of 6,000m. https://www.bbc.com/news/live/world-us-canada-65967464?at_bb...

From the article it seems like this ROV doesn't have sonar, and can only search visually at a short distance. They claim a distance of around 20 feet. I'm surprised they could find a debris field so fast with such a small range of observation.
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