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OceanGate’s ill-fated Titan sub relied on a hand-typed Excel spreadsheet
(www.theverge.com)
This is a most excellent place for technology news and articles.
Found a clip. And a CNN summary
There's much more meat to this story, but "hand-typed Excel spreadsheet!" is more relatable to laymen, even if it's completely irrelevant.
Edit: Here's the 7 hour long testimony if you want to hear the full version.