Those are the campaign files from OHII v2.5 and I was kind of surprised to see such a massive amount of BRT expected. Stock version is around 100.000 as far as I remember and even that has been tuned down by other mods.
Might be just a typo by the editor/modder and should probably be about 50.000 tons then.
I just don't want to start all over again, that's why I'd like to edit the campaign files while the thing is underway