Crossfield class decks
Turbolift controls with 17 decks
A cross section of the USS Discovery, with deck plan in the saucer section
An evacuation diagram, with deck plan in saucer and engineering sections
The decks of a Crossfield-class Federation starship. (DIS: "Context Is for Kings", et al.)
- Deck 1
- Bridge (DIS: "Context Is for Kings", et al.)
- Captain's ready room, replaced by science lab (DIS: "Context Is for Kings", et al.)
- Deck 2
- Deck 3
- Two-level science lab: Logic sciences, replaced by Paul Stamets' spore drive lab (DIS: "Brother")
- Guest quarters (DIS: "The War Without, The War Within")
- Deck 4
- Sickbay (DIS: "The War Without, The War Within")
- Transporter room (DIS: "Point of Light")
- Loading bay (DIS: "The Examples")
- Deck 5
- Mess (DIS: "Stormy Weather")
- Deck 6
- Deck 7
- Deck 8
- Deck 9
- Deck 10
- Deck 11
- Deck 12
- Utility closet, replaced by Logic sciences lab (DIS: "Brother")
- Deck 13
- Deck 14
- Deck 15 (DIS: "Lethe", "Stormy Weather")
- Deck 16
- Deck 17 (DIS: "Stormy Weather")
- Deck 18

Deck 1, aboard the USS Discovery

Deck 1, aboard the USS Discovery

Deck 4, aboard the USS Discovery

Deck 5, aboard the USS Discovery

Directions to the shuttlebay from Deck 5

Deck 15, aboard the USS Discovery
Background
To account for set changes between season one and two, Star Trek: Discovery art director Jody Clement has suggested that the mess hall seen during season one was on deck 2, and the mess hall from season two was on deck 5. [1]
The Art of Star Trek: Discovery (p. 28) featured a production diagram depicting what deck each of the Discovery's frequently used rooms was intended to be located on.