A whistleblower raised safety concerns about OceanGate’s submersible in 2018

&gt; “The vast majority of marine (and aviation) accidents are a result of operator error, not mechanical failure,” it reads. “As a result, simply focusing on classing the vessel does not address the operational risks. …”<p>The low occurrence of mechanical failure results from <i>rigorous manufacturing, testing, and inspection</i>. No one should have trusted their life to someone displaying such flawed reasoning.

&gt; “visible flaws” in the carbon fiber supplied to OceanGate raised the risk of small flaws expanding into larger tears during “pressure cycling.”