tl;dr:

The US Navy first detected the sound of the Titan’s likely implosion soon after the vessel lost contact with its mothership on Sunday while on an exploratory dive to the Titanic shipwreck more than two miles beneath the surface, The Journal reported Thursday. A top secret acoustic detection system that is used by the Navy to identify enemy submarines first registered the sound of an implosion near the since-discovered debris site on Sunday, US defense officials told the outlet. Navy officials began searching for sounds from the missing Titan almost immediately after it lost contact, according to the newspaper. Officials told the Journal that the Navy couldn’t definitively conclude that the sound detected on its system came from the Titan, but the signal helped narrow the scope of the search. The device, capable of diving 20,000 feet underwater, discovered the debris believed to be part of the missing Titan on Thursday morning.

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