[SandyCaesar]

Would it help if we managed to work out the design details/backstory of the sub? You never know what might be a plot point.

We know it runs off a lead-cooled reactor, as established by the in-game chatter. I conjecture that it has multiple pressure hulls, like a Typhoon-class, and was thus (at least partially) built by the Russians, given that the entire submarine hasn't been crushed flat. (Aren't retcons wonderful?)

Since it's an international crew, it's chartered by the Royal Navy. Someone already pointed that out. No ultra-sensitive materials onboard, so everything is about civilian-level--that includes sonar, radio, and ROVs. No torpedoes and no ESM/etc., and probably lax on sound discipline. She's not built to fight, after all.

...anything else?