Chilling last text of British billionaire stuck in missing Titanic sub revealed

 https://nypost.com/2023/06/20/last-text-of-british-billionaire-in-missing-titanic-sub-revealed/

This is always such a potentially dangerous situation.

https://www.mirror.co.uk/news/world-news/missing-titanic-submarine-sent-distress-30277280

https://nypost.com/2023/06/20/paul-henry-nargeole-diver-missing-on-titanic-sub-made-chilling-remark-about-deep-dives/

https://apnews.com/article/titanic-wreckage-missing-submersible-9f0e66fc1df5d9f1e8d262dc7ce0135e

A Remotely_operated_underwater_vehicle is so much safer. 

https://en.wikipedia.org/wiki/Remotely_operated_underwater_vehicle#Military_use

https://en.wikipedia.org/wiki/Remotely_operated_underwater_vehicle#List_of_scientific_ROVs