Neat. Enjoyed that. You get a bit of a sense of what life is like on a sub watching movies, but it's cool to see more of the day-to-day stuff. Those dudes - the white ones, anyway - must be incredibly pasty after a few months of living in a tube.
Submarines strike me as the closest earthbound approximation to living in a space shuttle for a prolonged period of time: complete reliance on instrumentation, cramped quarters, surrounded by potentially lethal atmosphere at all times... what a life.