[Aktungbby]

Originally Posted by Aktungbby

The navy knew about the Seismic event recording but it takes time thru channels to release that secret information.

https://www.wsj.com/articles/titanic...ology-8c020e7b

There are government secrets, and then there are government secrets about underwater spying.

Of all the categories of national secrets the U.S. government keeps, few have been as tightly guarded as how the military uses sophisticated acoustic technology to keep an ear on what its adversaries are doing thousands of feet below the sea.

Driving the push for such capabilities are decades of Cold-War brinkmanship and fears about Soviet submarines that could launch nuclear weapons. Today’s tensions with China have provided a reminder of the systems’ importance: The People’s Liberation Army Navy sails a fleet of dozens of submarines, including six that can carry ballistic missiles. “Anything involving the nuclear triad is supersecret,” said Brynn Tannehill, a senior technical analyst at RAND, referring to the strategic concept of nuclear weapons deployed from land, sea and air. “Anything involving U.S. sensor capabilities is supersecret.”

One such system—it couldn’t be determined which—heard what officials thought could be the implosion of the Titan submersible just hours after the vehicle began its voyage Sunday to the wreck of the Titanic. The U.S. Navy reported its findings to the Coast Guard commander on site, U.S. officials said. While the Navy couldn’t say definitively the sound came from the Titan, the discovery helped to narrow the scope of the search for the lost craft before its debris was discovered Thursday.

U.S. efforts to develop underwater-surveillance capacities trace back more than a century. Sonar, which uses sound waves to detect and locate objects, was used in World War I by the British and others to detect submarines. During World War II, the U.S. developed long-range sonar systems to detect German U-boats in the Atlantic.

At the dawn of the Cold War, the U.S. began work on what would become the Sound Surveillance System, or SOSUS. Developed to detect Soviet nuclear submarines, SOSUS relied on a network of listening devices called hydrophones fixed to the sea floor. Even the program’s name was kept classified until after the collapse of the Soviet Union. The location and capabilities of the hydrophones remain secret today. The system remains in use today, and it likely detected the noises made by the implosion of the Titan, said Tannehill, the Rand analyst. But other detection methods might also have aided the search. Whatever happened, it might be a long time before the government discloses its secrets.

“As soon as you start talking about anti-submarine warfare systems and boats in the North Atlantic, you immediately hit top-secret clearance,” Tannehill said.

“So if the Navy doesn’t seem particularly forthcoming, it can’t be particularly forthcoming without presidential authority to declassify anything they say,”

the BOTTOM LINE from someone who been to the bottom-several times-33 dives to RMS titanic alone!!: https://nypost.com/2023/06/23/james-...for-implosion/

James Cameron on Friday blamed the carbon fiber composite construction hull of the doomed OceanGate submersible for its tragic implosion this week. It was always doomed to implode: James Cameron says Titan sub's Achilles heel was 'fundamentally-flawed' carbon fiber hull which weakened after each of its 10 expeditions - and fears occupants may have realized they were about to die
There were two titanium end caps on each end. They are relatively intact on the sea floor. But that carbon fiber composite cylinder is now just in very small pieces. It's all rammed into one of the hemispheres. It's pretty clear that's what failed.'

Rush, who died in the Titan incident, said in a video posted online in 2021 that he had 'broken some rules' to create the vessel and added: 'The carbon fiber and titanium, there's a rule you don't do that – well I did.'

He also said in 2020 that the hull had 'showed signs of cyclical fatigue'.

Carbon fiber is prone to delamination, the process whereby a material fractures into layers while put under pressure.

Cameron said: 'The way it fails is it delaminates. You have to have a hull, a pressure hull, made out of a contiguous material like steel, or like titanium, which is the proven standard.'

'This OceanGate sub had sensors on the inside of the hull to give them a warning when it was starting to crack. And I think if that's your idea of safety, then you're doing it wrong. And they probably had warning that their hull was starting to delaminate, and it started to crack...
The material likely led to the “critical failure” that claimed the lives of five passengers aboard the minivan-sized craft, Cameron told ABC News’ George Stephanopoulos.

“You don’t use composites for vessels that are seeing external pressure,” he said. “They’re great for internal pressure vessels like scuba tanks, for example, but they’re terrible for external pressure.”

Cameron said the submersible’s designers relied on aviation engineering rather than submergence technology — an approach he believes led to the implosion during a tour of Titanic wreckage. ames Cameron on Friday blamed the carbon fiber composite construction hull of the doomed OceanGate submersible for its tragic implosion this week.
The material likely led to the “critical failure” that claimed the lives of five passengers aboard the minivan-sized craft, Cameron told ABC News’ George Stephanopoulos. “They fail over time, each dive adds more and more microscopic damage,” he said. “So, yes, they operated the sub safely at Titanic last year and the year before, but it was only a matter of time before it caught up with them.” The film director said he had warned other would-be explorers against using submersibles made using composite materials, telling one such owner “you’re going to die down there, if you dive that thing.”
“I wish I'd spoken up, but I assumed somebody was smarter than me, you know, because I never experimented with that technology, but it just sounded bad on its face," Cameron told Reuters.

OceanGate CEO Stockton Rush, who died in the submersible, previously asserted that carbon fiber was preferable to alternatives like titanium.

https://www.dailymail.co.uk/news/art...lles-heel.html <Cameron in 2012 after his successful solo dive in Deepsea Challenger to the deepest-known point on Earth, the Pacific Ocean's Mariana Trench