During a recent US Coast Guard Marine Board of Investigation hearing, Wilby revealed that OceanGate relied on an Excel spreadsheet to map the submersible’s navigation. Furthermore, the data was manually entered by hand into the Excel spreadsheet.

A hearing into OceanGate’s Titan sub, which imploded during an expedition to the wreck of the Titanic last year, revealed that its navigation system allegedly relied on team members manually inputting the coordinate data into a spreadsheet in order to track the vessel.

A former OceanGate contractor claims teams would hand-write notes and input data into Microsoft Excel spreadsheets to help track the vessel.