Defiant class decks
The decks of a  Federation starship. There were five decks. 

Deck One ()
Main bridge ()
Captain's ready room ()
Transporter room One ()
Phaser cannons (2) ()
Upper main engineering ()
Plasma Exhaust Vents ()
Upper sensor array
Officer and Crew Quarters ()
Deuterium storage tanks

Deck Two ()
 Computer core
 Lower Main Engineering ()
 Main impulse engines
 Medical and Science Laboratory
 Mess hall ()
 Officer and Crew Quarters
 Sickbay ()
 Section 2: Engine room ()
 Targeting sensors
 Transporter Room Two ()
 Warhead control room ()
 Warp coils

Deck Three ()
 Aft Torpedo Magazine
 Airlocks (2)
 Antimatter Storage
 Cargo bay 1-4
 Section 15: Crew quarters ()
 Main Impulse Engines
 Shuttlebays 1-3
 Warhead Impulse Engines
 Warp Coils
 Shuttle and workbee maintenance

Deck Four ()
Landing struts
Navigational deflector
Pulse Phaser Cannons (2) (; )
Forward and Aft Torpedo Magazines ()
Aft torpedo launchers (2) ()
Forward Torpedo Launcher (1) ()
Lower Sensor Array
Shuttlebay 1-2 exterior Doors and Elevator System ()
Main tractor beam emitter
Deck Five ()
 Section 1 ()