The 1300m rated viewport was on the (retired/rebuilt) 1st gen sub, not the one that failed. If you pay attention to the photos, the Titan has an obviously different viewport.
If you are this mistaken on such a simple matter of fact, please look inward and maybe reconsider being so assertive and judgmental.
You won't because it doesn't fucking exist because there was zero certification of the vehicle. There's no way for potential customers to verify any safety claims of the sub.
You can, today, buy any manner of uncertified experimental aircraft and fly them in general aviation. What is the surprise? Experimental vehicles are a thing. If you don't like them, don't fly/float on them.
No you can't. Experimental aircraft have to get certified by the FAA.
[0] https://en.wikipedia.org/wiki/Ultralight_aircraft_(United_St...