The Titan: here’s what’s going on with the missing Titanic wreckage tourist sub

Crews searching for the Titan submersible heard a “banging” sound early Tuesday.

A Canadian search aircraft with underwater detection capabilities picked up “banging” sounds coming from the depths around the HMS Titanic wreckage about every 30 minutes, per a US government memo obtained by CNN.

Rolling Stone, who first reported it, said an email to the Department of Homeland Security from the research group Explorers Society read:

“It is being reported that at 2 a.m. local time on site that sonar detected potential ‘tapping sounds’ at the location, implying crew may be alive and signaling.”

Knocking was heard 4 hours later when “additional sonar was deployed.”