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> DSV Limiting Factor which seems much better built.

Understatement of the year. Limiting Factor is the only manned sub to make multiple dives (4!) into the Challenger Deep.

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There’s a good documentary on YouTube from a year or two ago on the design and building of the sub, and overall it just seemed like such a professional operation, whereas OceanGate felt like a DIY operation.

The company that built the LF also seems to have vastly more experience building subs.

Here's the video I think.

https://www.youtube.com/watch?v=pb5j9oeZCm0

Thanks, that’s the one! Sorry was on the move on mobile.

Really cool, had never heard of this before. I just watched the documentary on James Cameron and his Deepsea Challenger and was similarly impressed by the extraordinary lengths the team went to in engineering it. My takeaway was that OceanGate likely didn't have anywhere close to the same level of design and testing.

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