Titanic tourist sub goes missing sparking search
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Russjstewart
Contributor
Will there be criminal prosecutions?
On Saturday, Canadian investigators from the Transportation Safety Board were dispatched to St. John’s to gather information and conduct interviews, the agency said. The Royal Canadian Mounted Police confirmed that it’s determining whether a criminal investigation is warranted but declined to comment further.
gcaptain.com
On Saturday, Canadian investigators from the Transportation Safety Board were dispatched to St. John’s to gather information and conduct interviews, the agency said. The Royal Canadian Mounted Police confirmed that it’s determining whether a criminal investigation is warranted but declined to comment further.
Titan Disaster Probes Face Tricky Test of Criminal Liability
By Joel Rosenblatt and Teresa Xie (Bloomberg) — US and Canadian officials are looking into what went wrong in a commercial deep-sea adventure and whether crimes were committed that led the...
gcaptain.com
"Privatize the profits, socialize the losses"
Lemon socialism, underwater billionaire edition.
HalcyonDaze
Contributor
Well, we are seeing claims that the submersible's carbon fiber hull was de-rated from 4,000 to 3,000 meters after the test dive series and needed repair work or possibly even replacement. If that happened after 10 test dives over two years, inspection and repairs were done, there were 13 dives in two years on Titanic, and there was no inspection or repair of the hull before the last dive ... that raises a big red flag as to OceanGate's operations, and further reinforces the assessments of the sub not being suitable for repeated dives.
broncobowsher
Contributor
I'm still trying to understand the use of carbon fiber. Going the opposite direction, Carbon fiber wrapped gas cylinders they are a thin walled aluminum cylinder that can't take the pressure, but carbon fiber is wrapped around it to hold it together. The aluminum layer is what makes the cylinder gas tight, the carbon fiber keeps if from failing. And many, if not most, are not rated for in water service as water gets into the fibers. Yes, there are some diving rated carbon wrapped cylinders.
As I understand it Carbon fiber layup is generally a bit porous. They are just fibers and need a resin to glue them together. The rule I know of is the less glue, but still enough, is best for strength to weight ratio. But that is just a layer of glue on the fibers. It is not a solid block of resin that happens to have fibers in it. If you look at a typical fiberglass boat (glass fibers instead of carbon) it is typically referred to as Fiberglass reinforced plastic. The plastic being the main component, the fiberglass being the added structure. The opposite of carbon fiber where I typically know of vacuum bagging a part for the reason of removing the plastic resin as much as possible.
Now I can assume that the carbon fiber layup was done with a heavy resin to fill the voids, but that weakens the carbon fiber layup and adds weight.
I can't help but to think that the layup isn't a sealed and solid mass. Add pressure, and cycles, microscopic porosity through the structure. I just can't see anything good coming out of it.
As I understand it Carbon fiber layup is generally a bit porous. They are just fibers and need a resin to glue them together. The rule I know of is the less glue, but still enough, is best for strength to weight ratio. But that is just a layer of glue on the fibers. It is not a solid block of resin that happens to have fibers in it. If you look at a typical fiberglass boat (glass fibers instead of carbon) it is typically referred to as Fiberglass reinforced plastic. The plastic being the main component, the fiberglass being the added structure. The opposite of carbon fiber where I typically know of vacuum bagging a part for the reason of removing the plastic resin as much as possible.
Now I can assume that the carbon fiber layup was done with a heavy resin to fill the voids, but that weakens the carbon fiber layup and adds weight.
I can't help but to think that the layup isn't a sealed and solid mass. Add pressure, and cycles, microscopic porosity through the structure. I just can't see anything good coming out of it.
Dormant
Contributor
I wonder if they will be able to recover enough of the wreckage for an in depth analysis.
Bottom Surveyor
Registered
They recovered parts of the sub already
Dan
Contributor
Salvaged debris from Titan submersible contains 'presumed human remains': US Coast Guard
Debris recovered from the submersible that catastrophically imploded while on a voyage to see the Titanic wreckage last week contained "presumed human remains," the U.S. Coast Guard said. Salvaged pieces of the Titan vessel were unloaded from the Canadian ship Horizon Arctic at the Canadian...
Dan
Contributor
A timeline of the missing Titanic tourist submersible
While the recovery operation and investigation remains ongoing, here's what we know about the situation and how it unfolded.
abcnews.go.com
A timeline of the missing Titanic tourist submersible
While the recovery operation and investigation remains ongoing, here's what we know about the situation and how it unfolded.
abcnews.go.com
"A timeline of the missing Titanic tourist submersible
Multinational search and rescue efforts have turned into a recovery operation.ByMorgan Winsor
June 27, 2023, 5:56 PM
Multinational search and rescue efforts for a submersible that disappeared while on a tour of the wreckage of the Titanic off the coast of Newfoundland, Canada, have since become a recovery mission following the grim discovery that the deep-sea vessel had imploded underwater, killing all five people on board.
While the recovery operation and investigation remain ongoing, here's what we know about the situation and how it unfolded.
Sunday, June 18
The 21-foot sealed craft, named Titan, submerged at 8 a.m. ET with five people on board and a 96-hour oxygen supply. About an hour and 45 minutes later, the sealed craft lost contact with its operator, OceanGate Expeditions.At 5:40 p.m. ET, the United States Coast Guard received a report of an overdue submersible. The Titan was supposed to resurface at 3 p.m. ET.
Monday, June 19
The U.S. Coast Guard in coordination with the Canadian Coast Guard and the Canadian Armed Forces conducted a surface search for the missing submersible using various aircraft, including one with underwater sonar capability.Tuesday, June 20
As of 7 a.m. ET, crews in multiple aircraft had flown over an area of the Atlantic Ocean "roughly about the size of Connecticut" while "looking for any signs of surfacing," Rear Adm. John Mauger, commander of the First Coast Guard District, told ABC News.Bahamian research vessel Deep Energy, which specializes in pipe-laying and has remotely operated vehicle capabilities, arrived at 7 a.m. ET to help with the search.
A source familiar confirmed to ABC News that there were reports of "banging" that were picked up by sonar in the search area sometime in the morning, but nothing has yet been found.
At 4 p.m. ET, a crew from the New York Air National Guard arrived on scene to help with the search.
Wednesday, June 21
At 12:18 a.m. ET, the U.S. Coast Guard announced via Twitter that a Canadian aircraft with sonar capabilities had "detected underwater noises in the search area." Remotely operated vehicle operations (ROV) were then relocated "in an attempt to explore the origin of the noises," according to the U.S. Coast Guard."Those ROV searches have yielded negative results but continue," the U.S. Coast Guard tweeted.
Data on the noises was sent to the United States Navy to be examined, according to the U.S. Coast Guard.
That evening, a U.S. Navy official told reporters that a portable crane system capable of bringing up items from as deep as 20,000 feet had arrived in St. John's, Newfoundland, but was waiting to be welded onto a chartered ship to take it to the search area.
At the time, the U.S. Navy had not yet contracted a ship for the system, known as Fly Away Deep Ocean Salvage System or FADOSS, the official said. Once the ship is contracted, U.S. Navy teams will spend approximately 24 hours working around the clock to weld the system aboard the ship before it can leave port, according to the official. FADOSS is the salvage system the U.S. Navy uses for all of its deep-water recoveries.
Thursday, June 22
At 6:56 a.m. ET, the U.S. Coast Guard announced via Twitter that a remotely operated vehicle, or ROV, deployed by the Canadian vessel Horizon Arctic has reached the sea floor, beginning its search for the missing submersible. The Titan's 96-hour oxygen supply was forecast to run out sometime in the morning.At 7:30 a.m. ET, the U.S. Coast Guard tweeted that the French vessel L'Atalante has deployed its ROV into the water in the search area.
The Royal Canadian Navy's HMCS Glace Bay arrived on scene at around 8 a.m. ET. The ship provides a medical team specializing in dive medicine and a six-person mobile hyperbaric recompression chamber, according to officials. Meanwhile, Canadian Coast Guard ships John Cabot, Ann Harvey and Terry Fox were also on scene and ready to provide rescue equipment and personnel, should assistance be required. A Royal Canadian Air Force CP-140 Aurora aircraft was maintaining continuous on-scene support with additional aircrews and assets, officials said.
At 11:48 a.m. ET, the U.S. Coast Guard tweeted that "a debris field was discovered within the search area by an ROV near the Titanic" and experts were "evaluating the information."
At 2:49 p.m. ET, OceanGate Expeditions issued a statement saying that all five people aboard the Titan were believed to be dead.
During a press conference at 3 p.m. ET, the U.S. Coast Guard announced that an ROV has located the tail cone of the submersible about 1,600 feet from the bow of the wrecked Titanic. Additional debris found was "consistent with the catastrophic loss of the pressure chamber," according to Rear Adm. John Mauger, commander of the First Coast Guard District. The victims' families were "immediately notified," he said.
Five major pieces of the Titan, including its nose cone and pressure hull, were discovered by the ROV in a large debris field and a smaller debris field nearby, suggesting a major implosion had occurred, according to Mauger. At the time, it was too early to tell exactly when the implosion happened. It was also unclear whether crews would be able to recover the bodies of those killed and how much of the vessel can be salvaged.
Mauger told reporters during the press conference that two ROVs, one from France and the other from Canada, will remain at the site to continue mapping the debris fields.
At around 6 p.m. ET, a senior U.S. Navy official confirmed to ABC News that an underwater acoustic detection system heard on Sunday what was likely the implosion of the missing submersible. The information was immediately shared with the U.S. Coast Guard and analysis continued afterward, the official said. Separately, a U.S. defense official told ABC News that an analysis of the "banging" noises picked up by sonar buoys on Tuesday were not from the Titan but were either natural ocean sounds, biological noises or noises associated with the surface response vessels."
