One of the officer's quarters. That's a small MOC cannon secured to the wall. The tan bed can fold up during combat. I saw a pic of an officer sharing his room with a cannon in a book.
I enjoy the details you put into the interiors. The research you've done on real ships is also nice. I want to suggest that instead of using the camera's flash, get some type natural lighting in there so you don't get bright areas and dark shadows.