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#oceangate

1 post1 participant0 posts today
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immibis
TIL that on the dive where #OceanGate 's #Titan made a huge bang that everyone heard and shrugged off, the realtime monitoring system detected anomalous strain readings in one part of the hull, and continued to detect anomalous readings in every one of the 6-7 dives until the implosion, which nobody noticed. Source: Scott Manley's video based on NTSB reports
Public
Cosmic Log

OceanGate tale gets new twists as hearings wrap up
The tragic tale of OceanGate’s Titan submersible took on a few added twists today as the U.S. Coast Guard concluded two weeks of public hearings into last year’s catastrophic loss of the sub and its crew.

One former employee of Everett, Wash.-based OceanGate quote
cosmiclog.com/2024/09/27/ocean
#GeekWire #CoastGuard #OceanGate #Science #Submarines #Submersibles #Technology #Titanic

Cosmic Log · OceanGate tale gets new twists as hearings wrap upThe tragic tale of OceanGate’s Titan submersible took on a few added twists today as the U.S. Coast Guard concluded two weeks of public hearings into last year’s catastrophic loss of the sub and it…
Continued thread
Public
SnoopJ

In today's testimony before the Marine Board of Investigation, former USCG and former #OceanGate operations technician Matthew McCoy recalls a conversation with Stockton Rush about his concerns over the legal gymnastics required to keep the Titan from being exposed to USCG jurisdiction

"if the Coast Guard became a problem…he said 'I would buy a congressman, and…the problems would go away…'"

Public
Cosmic Log

After Titan sub’s loss, Coast Guard reviews regulations
The U.S. Coast Guard took a deep dive into the regulations governing submersibles today at a public hearing looking into the causes of last year’s loss of OceanGate’s Titan sub and its crew. And the issues raised sometimes got as murky as the depths of Puge
cosmiclog.com/2024/09/26/after
#GeekWire #CoastGuard #OceanGate #Science #Submarines #Submersibles #Technology #Titanic

Cosmic Log · After Titan sub’s loss, Coast Guard reviews regulationsThe U.S. Coast Guard took a deep dive into the regulations governing submersibles today at a public hearing looking into the causes of last year’s loss of OceanGate’s Titan sub and its crew. And th…
Public
Cosmic Log

Investigators identify problems with Titan sub’s hull
A pair of reports by the National Transportation Safety Board found evidence of imperfections in the carbon-fiber hull that was made for OceanGate’s Titan submersible — plus indications that the hull behaved differently after a loud bang was heard at the
cosmiclog.com/2024/09/25/inves
#GeekWire #CoastGuard #NTSB #OceanGate #Science #Submarines #Submersibles #Technology #Titanic

Cosmic Log · Investigators identify problems with Titan sub’s hullA pair of reports by the National Transportation Safety Board found evidence of imperfections in the carbon-fiber hull that was made for OceanGate’s Titan submersible — plus indications that the hu…
Continued thread
Public *
SnoopJ

I should note that the above figures were produced by NTSB. #OceanGate themselves visualized these data in a different way that makes it a bit harder to compare the behavior during ascent and descent.

Here's data from Dive 80 as visualized by OceanGate. The sudden jump in the strain gauge reading is when the "bang" occurred.

Slide from NTSB report "Material Investigation - OceanGate Titan" showing the strain gauge response (both "hoop" and "longitudinal") for Dive 80. A sharp discontinuity is visible in both gauge readings at approximately 750 meters during the after-dive ascent.
Continued thread
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SnoopJ

At the end of Dive 80, a loud bang was heard by submersible occupants, and reportedly at least one of the staff at surface level was able to hear it as well while the vehicle was still underwater.

Strain gauge data shows that this *permanently* changed the strain response of the hull on subsequent dives.

There was abundant evidence that the "bang" had fundamentally changed the vehicle's performance under pressure, and they continued to operate it until it got 5 people killed.

Slide from NTSB report "Material Investigation - OceanGate Titan" showing the depth of the submersible vs the output of a strain gauge. Data for both Dive 80 and Dive 81 are shown, with Dive 81 data showing a pronounced change in the slope of the gauge response between 0-500 meters depth. The changed slope is present for both descent and ascent.
Slide from NTSB report "Material Investigation - OceanGate Titan" showing the depth of the submersible vs the output of a strain gauge. The gauge data for both the "hoop" and "longitudinal" strains are shown. Data taken for Dives 81, 82, 83 show a different response slope from 0 to 500 m depths than the response for Dives 75, 80.
#OceanGate
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