Footage capturing moment Titan sub imploded has been revealed

It's been nearly two years now since the Titan sub made headlines across the globe following its implosion which killed all passengers on board.

The tragic events took place in June 2023 when a massive operation was launched after the missing submersible - which had an inside space of just 22ft long and 9ft wide with a height of a little over 8ft - vanished about 435 miles (700km) south of Newfoundland, Canada.

The craft, operated by OceanGate Expeditions, carried five people on board, including a pilot, a content expert, and three paying customers.

And now, coming up to the two-year anniversary of the disaster, ship footage shared with BBC has captured the haunting sound of the Titan sub imploding as they've been given unprecedented access to the US Coast Guard's (USCG) investigation for a documentary titled Implosion: The Titanic Sub Disaster.

Have a listen:

Titan lost contact with its surface crew on 18 June 2023 as it explored the underwater gravesite of the Titanic wreckage, which lies around 12,500ft deep.

The US Coast Guard later announced the 'catastrophic implosion' of the Titan vessel some days later (22 June) after debris was discovered near the wreck of the Titanic off the coast of Newfoundland.

The implosion ended up killing all five passengers on board, who were identified as OceanGate CEO and co-founder Stockton Rush, British billionaire Hamish Harding, French diver/Titanic expert Paul-Henri Nargeolet, and father and son Shahzada and Suleman Dawood.

Wendy Rush, the wife of Oceangate CEO Stockton Rush, seen asking what the noise she heard from the support ship was (BBC)

The BBC's footage shows Wendy Rush, the wife of OceanGate director Mr Rush, sitting in front of a computer that was used to send and receive text messages from Titan.

At the point when the sub reaches a depth of about 3,300m, a noise that sounds like a 'door slamming' can be heard.

Mrs Rush then pauses to look up and ask other OceanGate crew members what the noise was.

Hearing the sound of the implosion while watching on from the sub's support ship, she asked: "What was that bang?"

In the footage, a chilling noise that sounds like a 'door slamming' can be heard (BBC)

Shortly after, she receives a text message from the sub saying it had dropped two weights - something which seems to have led her to mistakenly think the dive was proceeding as expected.

However, the USCG has said that the noise was in fact the sound of Titan imploding but the text message, which must have been sent just before the sub failed, took a while longer to reach the support ship than the sound of the implosion.

The video in question has been presented as evidence to the USCG Marine Board of Investigation, which has spent the last two years looking into the sub's disastrous failure.

Implosion: The Titanic Sub Disaster airs on Tuesday 27th May on BBC Two at 9pm. It will also be available on BBC iPlayer.