I was pretty pleased with myself when I realized it was perfectly logical for my point-of-view character to be claustrophobic. After all, she was born in the ocean (literally) and lived almost her entire life on a raft. Sure they had canvas structures to keep the rain off their heads, but overall, the sky has been her ceiling.
So when she’s on a submarine, that’s got to be pretty awful, right?
I got to that point and realized that I know next to nothing about: a) claustrophobia, and b) submarines. After about two thousand words in this setting, I have finally dug up a cutaway of a typical attack submarine, and, well, the sub in my story has a lot more decks. Maybe that’s why the ceilings seem so low to her; the decks are only four feet apart to fit them in a 33-foot diameter cylinder.
But that’s what rewrites are for, right?