Another mission specialist who worked with the company that owned the Titan submersible that imploded last year while on its way to the Titanic wreckage is scheduled to testify before a U.S. Coast Guard investigatory panel Friday. The investigatory panel has listened to three days of testimony that raised questions about the company's operations before the doomed mission. OceanGate co-founder Stockton Rush was among five people who died when the submersible imploded en route to the site of the Titanic wreck in June 2023.