Capt. Jamie Frederick, U.S. Coast Guard Sector Boston, testifies before the Marine Board of Investigation during the Titan submersible hearing in North Charleston, S.C., on Sept. 27, 2024. The hearing examines all aspects of the loss of the Titan, including pre-accident historical events, regulatory compliance, crewmember duties and qualifications, mechanical and structural systems, emergency response and the submersible industry. (U.S. Coast Guard photo by Petty Officer 2nd Class Kate Kilroy)