Oh, you mean the deck that contains primarily research labs, work areas for various technicians, and related duty stations, according to TMoST. Quarters, including passenger quarters, are on decks 4, 5, and 6, same source. A source that has Gene Roddenberry's name on it I might add.
Which appears to be the official mark for material to be ignored, at the rate these things are going. Is there anything
left in TMoST that would actually hold true for the Star Trek universe?