Keith Fawcett, U.S. Coast Guard Marine Board of Investigation (MBI) technical advisor, left, listens to witness testimony from Mark Negley, Boeing Co., during the Titan submersible hearing in North Charleston, S.C., on Sept. 26, 2024. The MBI is tasked with examining the causes of marine casualties and making recommendations to improve maritime safety. (U.S. Coast Guard photo by Petty Officer 2nd Class Kate Kilroy)