^ Actually, unless things have changed, the Polaris' internal "up" is aligned with its external "forward," and its internal "down" is its external "aftward." If that is still true, than the ship's external notions of up, down, port and starboard are irrelevant with respect to the orientation of the internal forward/backward and leftward/rightward axes.
Y'know ... I knew that. It's one of the things I like about the concept. And yet, when I posted above, that fact wasn't anywhere in my thoughts. Nor were there any thoughts about decks at all ... I just seem to have picked an orientation and said, that looks weird, so that's it!
What an amazing mind I have!