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OceanGate’s ill-fated Titan sub relied on a hand-typed Excel spreadsheet

A former OceanGate contractor, Antonella Wilby, testified before a U.S. Coast Guard panel on Friday that the company’s Titan submarine, which imploded last year during a dive to the Titanic’s wreckage, relied on an incredibly convoluted navigation system. As Wilby described it during the US Coast Guard Marine Board of Investigation hearing, the Titan’s GPS-like ultra-short baseline (USBL) acoustic positioning system…