I thought you'd never ask!
http://www.public.navy.mil/bupers-npc/reference/nec/NECOSVol1/Documents/05-NAVSTDs_CH-51,%20Jul12.pdf
Thanks to a friendly Senior Chief for pointing this out to me, I actually had never seen it in writing before. It's a useful document to serve as an understanding of what exactly is expected of the various enlisted ranks in the Navy.
I couldn't find a similar document for officers. My guess is we simply step up or down accordingly to fill the role we're given.
