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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

#141

Post by ChuckNorris89 »

danpalmer wrote: post #139
kzrdude wrote: post #136

Earlier quoted context omitted.

They lost contact about 1¾ hours into the voyage, while it's expected to take 3 hours to get down to the Titanic wreck. From that, it sounds like they would be somewhere midway down.

I believe I read that they lost "communication" 1hr 45 in, but continued to receive data of some kind or something for a little while longer. However, it sounds like they've had comms issues on most of their previous dives, so perhaps the 1hr 45 is just a red herring here.

>continued to receive data of some kind or something for a little while longer

The wireless Logitech controller was still in pairing mode.

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

#142

Post by bg46z »

anigbrowl wrote: post #107
eigenspace wrote: post #94

Earlier quoted context omitted.

> 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? Modelling and knowing surface currents is one thing, but this submersible was thousands of meters deep. Deep ocean currents can be very fast, change often, and we have way less data on them.

'Telemetry? who needs it' - Oceangate, probably

Telemetry doesn’t work very well under water. There’s work to be done on telemetry that is capable underwater, but it seems a long ways off.

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

#143

Post by civilitty »

somenameforme wrote: post #126
pizzafeelsright wrote: post #116

Earlier quoted context omitted.

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.

Most work class ROVs top out around 3,000 meters but there are plenty of ultra-deepwater ROVs that go to 4,000 meters and beyond that are specialized for search and rescue operations. The usual ROV players like Oceaneering International, Saab SeaEye, TechnipFMC, etc. all make them.

The Navy & Coast Guard would definitely have access to their own fleets

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

#144

Post by jonah »

sho_hn wrote: post #97
RIMR wrote: post #78

Earlier quoted context omitted.

>Hopefully future subs will have more safety features. From an engineering standpoint, Titan didn't have any safety features at all. What any sane engineer would recommend as a last-ditch backup system Oceangate relied on as a single-point-of-failure. No phone. No beacon. Budget bluetooth controller and touchscreens. Electronics you'd expect to find in an RV. All from a CEO who flaunted his corner-cutting and apathy…

> From an engineering standpoint, Titan didn't have any safety features at all. This isn't quite true. It had multiple redundant ways to drop ballast, for example. What I would say from what I was able to find out (and with some familiarity of safety engineering processes from work; I make cars) is that it's safety-concept was very spotty. It had solutions to some problems, but also large gaps in the safety concept.…

There were apparently timed-release (bags of lead shot on dissolvable links) and manual-release (rock the sub to tip lengths of steel pipe off their racks on the sides) ways of jettisoning ballast as well.

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

#145

Post by onesphere »

mindslight wrote: post #50
fuzzbazz wrote: post #12

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.

https://en.wikipedia.org/wiki/Brittle_strength If it imploded, maybe its wreckage is banging against itself and that's the sound we're hearing.

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

#146

Post by jonah »

TT-392 wrote: post #98
RIMR wrote: post #78

Earlier quoted context omitted.

>Hopefully future subs will have more safety features. From an engineering standpoint, Titan didn't have any safety features at all. What any sane engineer would recommend as a last-ditch backup system Oceangate relied on as a single-point-of-failure. No phone. No beacon. Budget bluetooth controller and touchscreens. Electronics you'd expect to find in an RV. All from a CEO who flaunted his corner-cutting and apathy…

You can't just have a phone that works at those depths

Acoustic data/voice connections are solved COTS hardware bits - https://www.l3harris.com/all-capabilities/acoustic-general-p...

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

#147

Post by accrual »

jrs235 wrote: post #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.

The Titan wreck was found 1,600 feet from the bow of the Titanic, it was found on a smooth bottom of the sea floor, per the ongoing Coast Guard press release.

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

#148

Post by xoxxala »

WhereIsTheTruth wrote: post #87

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

I doubt the US Army has many options for locating DSVs.

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

#149

Post by gregoriol »

anigbrowl wrote: post #107
eigenspace wrote: post #94

Earlier quoted context omitted.

> 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? Modelling and knowing surface currents is one thing, but this submersible was thousands of meters deep. Deep ocean currents can be very fast, change often, and we have way less data on them.

'Telemetry? who needs it' - Oceangate, probably

When communication has been lost, what kind of telemetry would you expect?

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

#150

Post by taco_emoji »

tivert wrote: 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…

the ocean is three dimensional
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