The Enterprise- any iteration thereof- must seem positively paradisical compared to this. The Sukhoy Nos is a hundred and seventy-five meters long and just barely has room for a hundred and sixty men. There are decent places on the sub, to be sure, but they're in the crew areas, not down towards the engine rooms and the reactor. And that's where they're heading- away from the parts of the vessel meant for men, and down into the belly of the beast.

Tsybenko mutters to Kirk as they pass through an especially narrow corridor, "I had an uncle on one of these things. How Arkady failed to go mad is beyond me."