Missing submarine: sounds captured during search may be passengers following rescue protocol

After reports from the US Coast Guard that they captured noises similar to knocks during searches for the Titan submarine, which went to the wreck of the Titanic, there is news that passengers may follow protocol safety.

Around 2 p.m. (Brasilia time) this Wednesday (21), Captain Frederick, involved in the search, reported that the Canadian plane P-3 had also heard noises this Wednesday (21).

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  • However, Carl Hartsfield of the Woods Hole Oceanographic Institution said it is very difficult to figure out what kind of noise it is;
  • The team has “lots of sensors in the area, bringing data back to the best people in the world and feeding it back to the team so they can make decisions”;
  • “They must eliminate potential artificial sources other than Titan,” he concluded;
  • Rescue operations have focused on the noise, but nothing has been found so far;
  • The oxygen supply to the five people trapped on the Titan is expected to run out at 6 a.m. Brasília time this Thursday (22), making the next few hours critical.


The noises were reportedly heard every half hour for four hours on Tuesday (21).

Deep-sea experts told the BBC It can be difficult to determine what these noises might be without analyzing the data. However, it is possible that these are short, high-pitched, and relatively high-frequency noises coming from inside the submarine.

Frank Owen of the Submarine Institute of Australia said he remained confident, based on the information available so far, that the sounds came from Titan. “If there was a 30-minute gap, it’s very unlikely to be anything other than human,” he said. BBC.

Among the five men on board, the noises could come from Paul-Henry Nargeolet, 77, a former sea diver and great explorer, according to Owen. “He would know the protocol for trying to alert the search forces… Every hour and half hour you knock frantically for three minutes,” he said.

However, in searches such as Malaysian Airlines flight MH370, which disappeared in 2014, and the Russian submarine Kursk, in 2000, underwater sounds were also intercepted, but did not yield results.

Additionally, Mauger indicated that there are several metal objects at the Titanic wreck site that could cause such noises.

Owen, however, remains hopeful, as the sounds were picked up by buoys in the area of ​​the Titanic, submerged at 3,800 meters. All types of magnetic radiation, including radio and radar, are almost completely useless underwater, but sound can travel great distances quickly.

Owen pointed out that it’s possible for sounds from deep layers of the ocean to reach the buoys, but are more likely to come from the same layer. “It is very difficult to hear the sound of the diaper [superior] because the sound is refracted by the drop in temperature. But when it’s in this isothermal layer… between the surface and 1.80 m… the sound behaves quite simply.

He further stated that if the sounds were indeed coming from the Titan, rescuers could find it very quickly. “[Eles podem] place standard buoys around this area so they can locate themselves. The sonobuoy receiver is able to trace this type of information very quickly… it would take very little time to find it.

But, as of this writing, the U.S. Coast Guard says underwater vehicles sent to find where the noises are coming from have yet to find anything.


So far, the depth of the ship or the problems it faces remain unknown.

But among the theories, one is that the Titan did not sink, but is on the surface. “It’s entirely possible the submarine is on the surface somewhere and hasn’t been found yet,” said David Russell, a former Royal Navy officer who helped search for the Kursk. . BBC.

If it is in the upper layer of the ocean, its recovery would be very fast; but if it’s at deeper levels – like the theory it was on the Titanic – the task would be much more complex.

“We’re talking about bringing it to the surface using some kind of fancy drone to attach wires and ropes to the craft and then hoisting it up or putting it on a crane,” Russell said. “We’ve done this stuff before, but never – as far as I know – in this kind of depth.”

Owen said such an operation, complex in itself, would require equipment that, so far, is not available in the search region.

The rescue “nerve center” is based in Boston, Massachusetts, USA. US and Canadian shipping agencies and commercial deep-sea companies are participating in the operation.

In the search area, there are military aircraft, a submarine and several ships, equipped with underwater ROVs (remotely operated vehicles), but these will be more useful in data collection, Owen said. “You need heavy equipment to bring something like this. Even lowering the extra cable you’re going to hitch requires a huge winch, as you’re probably talking about 5-6 km of cable.”

With information from BBC

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Elmer Hayward

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