According to reports, hours after the Titan submersible entered the water, the US Navy discovered its implosion on underwater sound monitoring equipment.

It was captured by a covert acoustic monitoring system intended to find submarines, according to The Wall Street Journal.

According to a senior US Navy official, the Titan submersible was operating in the general area when communications were lost when the US Navy conducted an analysis of acoustic data and discovered an anomaly that was consistent with an explosion or implosion.

Although not conclusive, the incident commander was immediately informed of this information to help with the ongoing search and rescue effort.

A senior Navy official told the Associated Press that after the submersible was reported missing on Sunday, the US Navy reviewed its acoustic data and discovered an anomaly that was suggestive of an explosion or implosion.

When communications were lost, the Titan submersible was operating roughly where that anomaly was, according to the official.

The Coast Guard carried on its investigation after receiving the information from the Navy.

‘Detection would have been child’s play for Navy’

According to aircraft and naval research consultant Steffan Watkins, the US Navy has spent a significant amount over the past five years creating a new deep-sea sensor network "that they don't talk about".

He said, "I'd expect narco "subs" and dubious submersibles that implode must be child's play for them since they're deploying underwater detection technology that's supposed to detect the most sophisticated, quiet subs."

Senior adviser Mark Cancian of the Center for Strategic and International Studies said he would have been "surprised" if the implosion had gone undetected by the US military's sensors.

They had suspicions about what had occurred but were unable to confirm it. All you are seeing are lines on a graph.

"And many people wouldn't accept it if you tried to convince them you weren't doing a search because the lines on a graph indicated an implosion," he continued.

The US Coast Guard announced on Thursday that it had discovered submersible wreckage close to the Titanic's wreckage, which is located 12,400 feet beneath the surface of the ocean.

The four-day search and rescue effort came to an end with the announcement.

Debris discovered on the ocean floor, according to officials, was consistent with the pressure chamber of the submersible imploding.

According to OceanGate Expeditions, the company that ran the submersible, all five of the passengers were believed to be dead.

It's too soon to say whether the implosion occurred at the time of the submersible's final communication on Sunday, according to US Coast Guard Rear Admiral John Mauger.

He claimed that later arriving search crews used sonar buoys to look for it, but they were unable to find it.

The Coast Guard will keep looking in the area of the Titanic in an effort to find more hints about what transpired with the Titan.

The recovery efforts for the submersible and the bodies of the five dead men will also go on.