> "No other submersible currently utilizes real-time monitoring to monitor hull health during a dive. We want to know why. Classed subs are only required to undergo depth validation every three years, whereas our RTM system validates the integrity of the hull on each and every dive." [1]

I suspect your intuition may be why RTM is not really used. Failures happen too quickly for them to give useful preventative data, perhaps?

[1] https://oceangate.com/news-and-media/blog/2019-0221-why-tita...