88reaper88 you are right. Most of the markings are small moving plates/hatches.. few of then you can see opened in few shots in the movie.
the other decals are warning signs..just like you wrote..
warnings, dangers, elevations, jet blasts, engine intakes and my alltime favourite
No steps
its a pity that the fueling of the dropship has not been completed.
Abou the Sulaco bay and it´s equipment. I think that this bay was specificly done for Dropships only (Cheyenne utility UD-4*** production row).
...most of the hardware has not moveable (optional) parts..I mean that this whole place was build bespoke. USS SULACO has different types of hangars,
but not that sofisticated as the dropship bay with its pressure chamber mechanism)
.... in this case (and othe cases)I´m filling the
unknown with my
fan fiction (for what is this hardware made?...is the typical question

)
Ilike to think about the hardware in the set (sulaco bay, colony ect...)and make some good explanation
for what is this for?
all that rocket holders, cranes, chains....
If this is satisfactorily explained for me , then my deviation is satiated
_______________________________________________
The same process I´ve applied to
fueling and Pods of the dropship
look at this hi res pic:
http://www.sulaco.cz/dropship-fuel-schematics.jpgLEGEND:ad A) this is decals layout from the movie...grabbed from dropship models and movie 1:1 instalation....there is
JP12 mark few times.
-and here comes my fan fiction - which i suppose is Military Jet Fuel.
JP12 is folower of known row of jet fuels today..which ends with
JP10.....it is nice coincidence..or FX crew or James Cameron knew something?
http://en.wikipedia.org/wiki/Jet_fuelad B) This is my addon to decals family with my own brand decals for
Fuel input hatches and for
mechanism which is holding the rocket pod attached to the moveable arm.
ad C) Here is explained everything about
pods :lol:
ad D) Here is a pic of the fuel tanks layout trough the dropship ...on right side is
FUEL VENT schematics of the tube
which filling the fuel from tank to tak trough lockable rings...on the left side is view with "new"opened inputs.
I think that THIS is something useful from what we can bounce.

and build functional world...
ALIENS world 
(and i can build my Dropship

)