[rgovostes]

As a US Navy-owned submersible, Alvin also undergoes extensive safety evaluation under the Naval Sea Systems Command SUBSAFE program: https://ndsf.whoi.edu/its-official/

Other manned submersibles undergo classification from groups such as DNV: https://www.dnv.com/services/manned-submersibles-1102

Yet OceanGate seems to have avoided this kind of safety classification: https://oceangate.com/news-and-media/blog/2019-0221-why-tita...