The decks of a Defiant-class Federation starship. There are four decks, and two sub-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.

• Deck Two
  • Lower Main Engineering
  • Main Impulse Enginess
  • Computer Core
  • Targeting Sensorss
  • Mess Hall
  • Warp Coils
  • Sickbay
  • Medical and Science Laboratory
  • Transporter Room Two
  • Officer and Crew Quarters
  • Warhead Control Room.

• Deck Three
  • Main Impulse Engines
  • Warhead Impulse Engines
  • Shuttlebays 1-3
  • Antimatter Storage
  • Cargo Bays 1-4
  • Airlocks (2)
  • Aft Topedo Magazine
  • Warp Coils
  • Shuttle and Work Bee 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.