The potential sources of the “banging noises” that were heard during the search for the Titan sub have been revealed.

On Thursday, the US Coast Guard confirmed the deaths of five crew members that were on OceanGate’s submersible Titan after parts of the submersible were found at the bottom of the Atlantic.

It has since been revealed that the vessel imploded on Sunday just hours after it set out on its journey to visit the Titanic wreckage.

In the days that followed, search and rescue teams repeatedly heard “banging noises” that were initially thought to be SOS signals from the Titan crew. At the time of the search, however, the five passengers were already long gone.

Experts have now explained the noises could have come from other search equipment deployed in the area or other manmade vessels.

“The ocean is a very noisy place with passing ships, submarines, fishing vessels, and indeed search vessels in this case,” Dr Jamie Pringle, a forensic geosciences expert, said.

“Noises can come from any source and sound waves don’t always travel radially outwards from a source, as water bodies are most often layered and sound waves travel along these.”

Elaborating on what we heard during the search, Pringle added: “Noise from the Titanic wreck at that water depth would also be unlikely to travel to the surface.

“The fact that it was every 30 minutes suggests a manmade cause and not vessel propellers which are continuous.”

The explanation comes after sources connected to the search said “banging noises” were detected by sonobuoys, prompting speculations that they were made by the crew from inside Titan to alert search crews of their location.

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