Deck G occupies the lower half of the saucer rim. Because of the concave curvature of the lower hull, the central area is separated from the outer rim, and can only be accessed from above or through Jeffries tubes.
About this creation
The central area is where most of the action takes place on Star Trek: The Original Series, aside from the Bridge and Engineering. If the corridors appear needlessly complicated it’s because I tried to re-create the layout of the set, which stood in for multiple locations and decks. I was still able to fit in everything I needed, including bathrooms, various labs and a morgue. I also put in dedicated turbolifts for Sickbay and Security. It’s not a big deck to walk around but given the higher traffic I felt justified in adding more access points.
Fwd centre is the security complex. A dedicated turbolift leads to the foyer. On the left a meeting is about to start, and to the lower right is the arnoury with racks of phasers.
The brig has seven cells. The corridor at the far end sports an extra force field barrier, used during prisoner transfers.
Off the entry corridor is a holographic target range.
Auxiliary control is just behind security. This area is rather poorly secured, considering how easily the Space Hippies took it over in “This Way to Eden.” It is meant to replace the main Bridge should it be damaged or occupied by hostiles.
The main computer room is at the centre. Although the core itself extends vertically to the upper and lower sensor domes, this is where the main interface is.
Sickbay is next. The central area is an examination/operating room.
To the right is the Intensive Care Unit, with four beds instead of three. I also duplicated this on the other end; for a crew of 430, three beds didn’t seem like enough.
To the left of the exam room is the CMO’s office and the med lab, which includes a hyperbaric chamber.
There are four 6-person transporters (p/s) with adjacent buffer rooms. That makes 24 pads available for emergencies, which would probably have to be computer co-ordinated so as not to all be in use simultaneously.
Two briefing rooms flank the main gangway to the secondary hull. One is the familiar room we usually see…
…and the other sports a long table like the one from the dinner scene in “Space Seed.”
Morgue. (This isn’t, however, why McCoy is called “Bones.”)
The concave midde ring is full of life support equipment, battery banks and field generators, all of which we’ve seen before on Decks D and E. The larger white tanks are 480 cubic metre compressed gas tanks, for hydrogen, oxygen, and nitrogen. These bulk supplies are used to replenish catastrophic loss, for example in the case of explosive decompression. Snaking around them are a number of catwalks connected to circular bulkhead openings. As for the long grey structures, well, that’s a surprise for later. (If you download the file don’t post spoilers!) Here we see one of four subspace transcievers.
And this is one of two transporter emitters, modelled after the ones we see on the outer hull of the Galaxy class ships and later. There’s no reason to think this technology is significantly different, I just tried to make it bigger and not have so many of them.
The outer ring of G deck has four turbolifts and six ladders leading up to F deck. There are four rec rooms (which also serve food) directly underneath the mess halls.
The chapel, though I've oriented it differently than as seen on screen.
Here there are also sixteen single guest staterooms. There are also several more briefing rooms, which can be modified to serve a variety of functions.
Aft is the 2-deck impulse egineering room. This is where Franz Joseph places main engineering, which is another commonly repeated mistake in fan-made deck plans. There isn’t a large enough volume available here to accommodate Scotty’s engine room. Furthermore the impulse engines would have to be squashed almost flat, when in fact the fusion reactors are generally shown to be quite large in other ship classes. Finally, it makes no sense to put the warp core at such an exposed point of the ship, so far from the nacelles. Besides, Matt Jeffries himself places engineering in the lower hull, even if the scripts in TOS were inconsistent about it. So I figure this is another area we never saw on screen, and I tried to render it in a fitting manner.
The impulse engines are essentially fusion reactors which provide sublight propulsion and secondary power. Nestled between the reactors is an equipment bay, and below that the connection points for the secondary hull. I can’t tell you how complicated it was to make this all fit.
This was a difficult section to lay out thanks to the hull connection and turboshafts. I actually finished the next few decks much earlier so they’ll be coming up right away. I should probably mention at this point that the only way to really see everything is to download the files and have a closer look. I’m also putting in Easter eggs that you can’t find otherwise, there are two on this deck and more to come. (Only in-universe, no franchise crossovers). So if you find one go ahead and post it in the comments, but SPOILER ALERT for those who want to find it on their own.
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