From the Main Circuit Breaker Room on Deck 9, power to all the saucer's internal systems is monitored both manually and by computer, insuring that unexpected energy surges do no damage to shipboard equipment.
The Waste Recovery System reduces discarded items and other waste products down to their component elements for later re-use by the ship's fabrication facility.
The primary hull's lower port and starboard phaser banks are mounted at hardpoints on Deck 9, behind the outer bulkheads.
Three viewing lounges are located on Deck 9. Each of these features four small viewports, which are built into the flooring beyond a protective handrail. The center of the deck is occupied by the computer core and its supercooling system.