The Navy confirm that it heard the implosion of the Titanic sub shortly after they lost comm with the mothership. An analysis of the SOSUS network confirmed this.
https://www.msn.com/en-us/news/technology/us-navy-detected-titan-implosion-hours-after-mission-started/ar-AA1cUd41?ocid=msedgntp&cvid=3017109f196a4fbe90ce69678eb607b1&ei=11
They’re dead, never saw it coming.