About the Ishimura...

I can't find a forum for plain old Dead Space so this will have to do. Ok, I've read just about every DS novel, graphic & otherwise & played every game. This one of my favourite franchises ever,  I love all of them, even that darn Extraction! But nowhere, and I mean NoWhere can I find what the USG in the USG Ishimura stands for. :womanfrustrated: Not even in the "The Art of Dead Space" (which is pretty cool as well) & sure, there's speculation on what it is but still nothing on what Redwood/Visceral's designation really means...