Guys, I think I know where the base (PATHOS-II) is.
Who ever made the deduction of the base at Ireland, you are a genius! (I think it was Pluto but I could be wrong)
So I kept researching about Continental Shelves and they can be a good place to form a human marine habitat (That or trenches). I checked Fortigurn's deduction together with mine and Fortigurn deducted that it could be in the deepest parts of the Epipelagic zone.
Now, most continental shelves are in a ~150 km depth so it should fit the theory of in the deepest part of the Epipelagic. But then I remembered that Ireland was a potential location so I searched the depths of Ireland's continental shelf. And guess what? It's entirely possible.
Furthermore, from the picture above, it could be that the green plants are kelp so I checked where kelp forests can grow and as it turns out,
Ireland have lots of kelp forests around it.
And with the depth of 150 km, the pressure isn't that great (15 atm pressure) and it's still possible to create a pressurized base just like ground atmosphere pressure (1 atm pressure), and thus re-inforcing more of this theory.
So if we put it all together, it's
POSSIBLE that the base is somewhere around Ireland.
So Ireland is possible for the base. And I think there was a map.
YES, I KNOW THAT ISN'T KELP