they're talking about nargeolet

> Wreck expert Paul-Henri "P.H." Nargeolet, who was also onboard, told me he wasn't worried about what would happen if the structure of the Titan itself were damaged when at the bottom of the ocean. "Under that pressure, you'd be dead before you knew there was a problem." He said it with a smile.

(as recounted by Arnie Weissmann, in Travel Weekly article published June 22, 2023)

Yeah I got the roles of pilot and guide mixed

https://www.newyorker.com/news/a-reporter-at-large/the-titan...