Dr. Don Kramer, chief of NTSB’s Materials Laboratory, presented the lab’s findings when examining the debris left from ...

Kramer said the Titan debris on the ocean floor showed that ... Kramer noted that the NTSB's investigation is still ongoing, and the scope of his presentation was therefore limited.

Engineer Don Kramer told a Coast Guard panel there were wrinkles, porosity and voids in the carbon fiber used for the pressure hull of OceanGate’s Titan submersible. Two different types of ...