Federation starship decks
Starships within the Federation, much like those found throughout the universe, were built with decks which served as the primary setting for all equipment, rooms, corridors, and personnel. The numbers for the deck count typically ran from top to bottom of a starship, beginning with deck 1. There was no set number of decks within Starfleet or Federation ships, as it varied from class to class.

Deck charts
California-class decks
Constitution-class decks
Crossfield-class decks
Defiant-class decks
Excelsior-class decks
Galaxy-class decks
Intrepid-class decks
Nova-class decks
NX-class decks
Oberth-class decks
Sovereign-class decks
Walker-class decks

Lists
 
Federation